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GraviVent® – TTC Silent Gravity Cooling/HeatingPlanning Documentationfor Engineers and Plant Contractors

TTC Timmler Technology

AASS 30 33 2 L 1

Order Key for Cooling Units

Performance category1 = for construction height 33 (effective duct height Heff 1,5–6 mm)2 = for construction height 51 (effective duct height Heff 1,5–7 mm)

© 2010 TTC Timmler Technology GmbH

This document or any part thereof may not be

reprinted, copied, or translated and figures and

diagrams may not be used without prior permission

in writing from TTC Timmler Technology GmbH.

Order Key for TTC Cooling Units

SeriesAASS ArCo; on duct; cupboardAVSI ArCo; in front of duct; integratedAISI ArCo; in duct; integratedAASI ArCo; on duct; integratedISHK In duct; Heating/Cooling

Length [mm]800 – 1000 – 1200 – 1400 – 1600 – 1800 – 2000 – 2200 – 2400 mm

Construction height [cm]33 > for series AASS, ASVI, AISI, AVSI51 > for series AASS, ASVI, AISI, AVSI

Function2 = 2 pipe system

Water connectionL = leftR = right

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ContentsGraviVent® – Silent Gravitiy Cooling

· Order key for TTC cooling units · Air conditioning in general

· Function, advantages and applications of TTC cooling units

· Installation options · Air inlets and outlets for TTC cooling units

· TTC cooling units in primary air mode

· Dimensions, series and weights

· Cooling capacitiy for categories 1 and 2 · Water sided pressure drop

· Formulae to calculate capacity

· Water and air cooling · Water sided pressure drop

3

iGeneral Information page 2–5

Design Example page 16–17

Performance Diagrams page 13–15

Technical Specifications page 10–12

Installation Examples page 6–9

· Capacity reducing factors for TTC air inlet and outlet gratings

· Part no. for TTC air inlet and outlet gratings

Options page 18

· Pipe installation for TTC cooling units · Reduced capacity through infiltrated air

Installation Instructions page 19–20

· TTC cooling units and optional extras

Order and Calculation Sheet page 21

4

General Information

Why do we air condition rooms?

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4.1 Intellectual performance at different room temperatures

4.3 Acceptance with different air conditioning systemsAcceptance with different air conditioning systems and room temperatures. (A study by P. O. Fanger and D. Wyon)*) Note! Instead of cooling ceilings, cooling units or cooling convectors could be used.

Advantages of TTC GraviVent®?

· No draughts, air speed 0.1–0.2 m/s · Condensation tray as standard, to prevent damage to fur-nishings and the building if condensation occurs

· High fall ducts for the cooling air to provide high cooling capacity with a small space requirement

· Silent operation without ventilation · Low running and investment costs for high comfort levels · Easy to upgrade if alterations are required · A wealth of design options for the room, for planners and architects

· High thermal and hygienic comfort if combined with a primary air system

· Additional to let area · Room temperatures can be individually controlled

Preferred cooling systems

Either water or air is generally the carrier for the cooling energy. The following solutions are commonly used to cool down com-mercial premises: · Centrally treated and cooled primary air · Cooling of structural elements · Chilled ceiling systems · Wall and ceiling systems with cooling units or chilled beams · Cooling units or convectors combined with cooled primary air

Working people spend the majority of their working life indoors. A maximum of physical and intellectual work is to be performed in this artificial environment. Studies with volunteers have shown that a persons productivity can be directly related to the thermal and air hygienical comfort of the room. In this context the air velocity, the relative humidity, the temperature gradient and the supply of primary air are of particular interest. Fig. 4.1-4.3 show mainly the results of studies by Prof. Ole Fanger and D. Wyon with a select number of volun-teers to determine peoples dissatisfaction with and ac-ceptance of air-conditioning systems.

4.2 Unhappiness of people at different room temperaturesPercentage of people who are unhappy with the rooms air conditioning, dependent on the:• floor level (ankle height) 0,1 m, and• head height (person is seated) 1,1 m

Present in room for 90 min

Presen

t in roo

m for 180 min

1 3 50 2 4 6

60

20

1

40

5

0,1

10

Room temperature [°C]

Men

tal e

f�ci

ency

[%]

22 23 24 25 26 27 28 29 30

95

90

85

80

75

70

65

60

40

20

15

10

5

0

22 23 24 25 26 27 28

25

30

35

(1)

(2)

(3)

(1) without vent./air cond. system(2) with vent./air cond. system(3) cooling ceiling* + source air

Relevant laws* and regulations* provide that commercially used spaces must have a primary airflow rate of approx. 6-9 m3/(h · m2) or a change of air at 2-3 times the room volume to comply with air hygiene requirements. These minimal primary air streams can thus significantly reduce ventilation systems and save running and investment costs.* (German Work Place Directive, DIN 1946/Part 2/Paragraph 3.2)

Is ventilation required?

General Information

The functional principle of TTC cooling units

5

Performance factors

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The functional principle of the TTC cooling units is based on the natural fact that warm and cold air have a different air density ρ [kg/m3].

At ceiling level warm air enters through the inlet grating [4] and is cooled down in the air cooler [1] through which cold water flows (see Fig. 5.1). If operated at high humidity, e.g. in a hotel room, special production rooms or when operated with-out pre-conditioned primary air a conden-sation tray is supplied as stan-dard under-neath the air cooler. Through the fall duct [2] and an attractive air outlet [3] the cooled air is returned to the room. This cooled air is then warmed up again by heat sources in the room, e.g. people, lighting, computers and other electrical and electronic equipment, sunrays through the windows, the warmth of the walls and rises to the ceiling.

The air velocity generated in the room through thermal condi-tions is very low and can only be measured with special equip-ment. This minute air circulation results in high thermal comfort levels and minimum temperature gradients in the occupied zone. The characteristic curves shown in the capacity diagrams on pa-ges 12–14 are based on test rig measurements and were carried out under defined installation and operating conditions.

Differing constructional conditions will need to be taken into account when determining the cooling performance of cooling units. TTC will be happy to help you with your calculations.

Treq.

Hef

f.

2

3

11

12

41

10

The performance of the TTC cooling units depends on many factors, for example: · The effective fall duct height Heff · The fall duct depth Treq (for unit height 330 = 100 mm and for unit height 510 = 150 mm)

· Spacing between sealing off walls (desired 600–800 mm, see page17)

· Smooth surface of the fall ducts and sealing off walls · Duct insulation on front and rear walls · The free cross-section of the inlet and outlet gratings (at least 70 % of the visible surface of the finned cooling unit)

· For other cross-sections see chapter »Reduced Preformance« on page 16

· Median temperature difference ∆m [K] between air intake and median temperature of the cooling medium

· Water viscosity and quality (VDI 2035) · Flow path restriction caused by pipe work or structural obstacles

· Redirection of the cool air flow

TTC Modultherm cooling units are ideally suited for all areas of application, where silent and efficient control of temperature is required:

Small and open plan offices, Conference rooms, Computer rooms, Recording and TV studios, Hotel rooms, Public access areas, Reception areas, Department stores, Printing and paper works, Assembly and production facilities, to remove heat from electronic or electrical control cabinets, etc.

5.1 Room airflow in cooling mode using TTC cooling units

[1] Air cooler incl. condensation tray[2] Fall duct for cold air[3] Air opening min. 70 % free cross-section of the air cooler visible area[4] Air inlet grating min. 70 % free cross-section of the air cooler visible area[10] False floor convector for heating mode[11] Required fall duct depth Treq

[12] Effective duct height Heff

Area of application

Products in Use | Examples

Example 1: Cooling unit on a wall

Example 2: Air intake for cooling units

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Fig. 6.1 shows the installation of an AASS unit in a TV studio or a test centre on a wall (dry construction wall installed in post-and-beam construction).

Key to Fig. 6.1[1] Cooling unit incl. condensation tray to collect condensate in dehumidification mode[2] Fall duct with sealing off walls [5] (spacing 600–800 mm) The minimum depth Dreq is 100 mm for unit height 33 and 150 mm for unit height 51.[3] Floor outlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[4] Air inlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[5] Sealing off walls to stabalize the cold air flow[9] Mixing desk or test console in studios or test centers[14] Upper sealing bar

Note:The minimum requirements under [2], [3] and [4] must be complied with to ensure the quoted capacities. For other cross-sections see page 16 or contact TTC.

6.1 Room air flow with TTC cooling units in cooling mode

Fig. 6.2-6.4 show three options for the air intake. Other options are available, please contact TTC. Fig. 6.2 shows the air flow to the cooling unit [1] via an air inlet grating [4] which has been integrated into a false ceiling. In Fig. 6.3 the air inlet grating has been replaced by an air gap [7] in the false ceiling.Fig. 6.4 shows ceiling panels with slits for the air intake. Op-tionally slots may also be placed at the ceiling edges.

Key to Fig. 6.2-6.4[1] Cooling unit incl. condensation tray to collect condensate in dehumidification mode[2] Fall duct with sealing off walls [5] (spacing 600–800 mm) The minimum depth Dreq is 100 mm for unit height 33 and 150 mm for unit height 51.[4] Air inlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[7] Air gap in the false ceiling (70 % free cross-section)[8] Ceiling panels with air slits (free cross-section 70 % of the visible area of the finned air cooler)[9] Gaps between wall and ceiling (not shown)

Note:The minimum requirements under [2], [4], [7] and [8] must be complied with to ensure the quoted capacities. For other cross-sections see page 16 or contact TTC.

6.2 Air intake through air inlet gratings in a false ceiling

2

3

7

1

6.3 Air intake through an air gap in the false ceiling

2

6

9

5

4

114

2

3

8

1

6.4 Air intake through ceiling panels


Example 3: Cooling unit behind a screen

Example 4: Air outlet grating into the room

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1

The example Fig. 7.1 illustrates the installation of an AASS cooling unit above a cupboard or shelve.

Key to Fig. 7.1[1] Cooling unit AASS incl. condensation tray to collect condensate in dehumidification mode[2] Fall duct with sealing off walls [5] (spacing 600–800 mm) The minimum depth Dreq is 100 mm for unit height 33 and 150 mm for unit height 51.[3] Air outlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[4] Screened air inlet grating (the free air intake should be 70 % of the visible area of the finned air cooler)[5] Sealing off walls to stabalize the cold air flow

Note:The minimum requirements under [2], [3] and [4] must be comlied with to ensure the quoted performances. For other free cross-sections see page 16 oder contact TTC.

7.1 Room air flow with TTC cooling units in cooling mode

7.2 Air beeing released into the room through wall and floor gratings

Fig. 7.2 illustrates the option for air to be dispersed into the room through an air outlet grating [3]. This type of air flow into the room ensures a good, even temperature distribution. To dimension the floor air outlets consultation with a ventilation engineer is required.

Key to Fig. 7.2[1] Cooling unit AASS incl. condensation tray to collect condensate in dehumidification mode[2] Fall duct with sealing off walls [5] (spacing 600–800 mm) The minimum depth Dreq is 100 mm for unit height 33 and 150 mm for unit height 51.[3] Air outlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[4] Air inlet grating with a free cross-section of 70 % of the visible area of the finned air cooler

Note:The minimum requirements under [2] and [3] must be complied with to ensure the quoted capacities. For other cross-sections see page 16 or contact TTC.

25

3

4

1

8


Example 5: Cooling unit integrated into the duct

Example 6: Cooling unit on a wall with dispersed air outlet at the window

Fig. 8.1 shows the AISI cooling unit [1] integrated into a fall duct [2]. On the room side the cooling unit is screened by an ar-chitecturally appealing air inlet grating which should have a free cross-section of 70 %. For this type of installation a mounting frame is supplied as standard. The top joint to the bare ceiling is formed, for example, by a waffle-type ceiling at the discretion of the architect and client.

Key to Fig. 8.1[1] Cooling unit AISI incl. condensation tray to collect condensate in dehumidification mode[2] Fall duct with sealing off walls [5] (spacing 600–800 mm) The minimum depth Dreq is 100 mm for unit height 33 and 150 mm for unit height 51.[3] Floor outlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[4] Air inlet grating with a free cross-section of 70 % of the visible area of the finned air cooler[5] Sealing off walls to stabalize the cold air flow


Fig. 8.2 shows a cooling unit [1] above a fall duct [2]. On the room side the cool-ing unit is screened by an architecturally appealing air inlet grating [4] which should have a free cross-section of 70 %.The air is returned to the room through a floor grating at the window. This type of installation always requires a false floor.

Key to Fig. 8.2Items [1], [2], [4] and [5] equivalent to Fig. 8.1. [6] Floor grating integrated into the false floor as a dispersed air outlet


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1 4

2

1

3

5

4

5

6

8.1 TTC Cooling units integrated in the duct

8.2 Luftverteilung über Quellluftauslass im Boden


9

Example 7: Cooling unit in a false ceiling with additional primary air mode function

FunctionExample 7 (Fig. 9.1) shows how TTC units may be combined with a primary air system. Via the primary channel [8] conditioned outdoor air is blown at low speed into the fall ducts via channels or pipes. If suitable silencers are used the sound pressure level can be kept below 30 (dBA).

InstallationThe cooling unit [1] can be installed on a wall between the bare and the false ceiling, on a cupboard or shelves. Design options showing how the cooling units could be covered on the room side are shown on page 6 (Fig. 6.2–6.4).

For the primary air intake the following variants would be suitable: · Air outlet gratings [3] in walls, cupboards or shelves · Air outlet gratings in the false floor, see Fig. 8.2 on page 8 · Dispersed air outlets

Outdoor air flowIn rooms to be occupied by people the outdoor air flow needs to be sized dependent on how many people are present in the room at the same time and what the room is used for (see the table in the right).

The outdoor air flow is frequently provided at 2.5–3 times the change of room air (see DIN 4701/Parts 1 and 2, as well as VDI 2078) the outdoor air flow can be reduced by 50 % dof the minimum outdoor air flow per person.

For rooms with additional pollution through smells (e.g. tobacco smoke) the minimum out-door air flow is increased by 20 m³/h per person.

2

1

3

5

4

5

6

Minimum primary air flow per person and hour*

Room type m3/h

Small office 30 Open plan office 50 Theatre/Concert hall 20Canteen 30Conference room 30Cinema 20Banqueting hall 20Rest room 30Break room 30Class room 30Reading room 20Lecture theatre 30Show room 20Shop 20Museum 20Hotel room 30Public House/Restaurant 40Gymnastic and sport hall 20 with seating for spectators*) in accordance with DIN 1946 / Part 2/Paragraph 3.2

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Key to Fig. 9.1

[1] Air cooler incl. condensation tray[2] Fall duct for cold air [3] Air outlet min. 70 % free cross-section of the visible area of the air cooler[4] Air inlet grating min. 70 % free cross-section of the visible area of the air cooler[5] Sealing off walls to stabalize the cold air flow[13] Primary air channel

9.1 TTC Kühlunit mit Zuluftbetrieb

10.1

Series AASS + AAVSDesign | Specification | Dimensions

AASS 33/51** seriesDesign

[1] Air cooler made of copper pipes with aluminium fins, max. operating temperature 90° C, max. operating pressure 10 bar[2] Housing completely made of aluminium plate [3] Water connection with R ¾", torsion protection[4] Condensation tray to collect condensate in dehumidification mode[5] Condensate drain, G ½”, mounted on the condensate tray and supplied as standard

InstallationThe cooling unit can be installed above shafts, cupboards or shelves. For examples see pages 6–9.

Important: To ensure optimum operation sealing off walls spaced at 600–800 mm need to be installed in the fall ducts.

10

Part.no. AASS …/…** 08 10 12 14 16 18 20 22 24

Finned length Lfinned [mm] 662 862 1062 1262 1462 1662 1862 2062 2320

Total unit length Lnom [mm] 800 1000 1200 1400 1600 1800 2000 2200 2400

Total weight*** (33) ≈ [kg] 10 12 13 16 18 20 22 23 26

Total weigth*** (51) ≈ [kg] 14 16 19 21 25 27 30 32 35

10.2

Part.no. AAVS …/…** 08 10 12 14 16 18 20 22 24



Total weight*** (33) ≈ [kg] 15 19 21 24 26 30 32 35 38

Total weigth*** (51) ≈ [kg] 20 24 28 30 34 38 40 44 46

*) Dimensions in brackets are for construction height 51

300

150L�nned

Lnom -23 mm

330

(510

)*

1

2

4

3

55

3030

60

visible side inside

ca. 200

100(150)*

200

L�nned

Lnom -23 mm

330

(510

)*

1

2

3

4

6

1

505580

30

visible sideinside

50

5ca. 200 5

100(150)*

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AAVS 33/51** seriesDesign

[1] Air cooler made of copper pipes with aluminium fins, max. operating temperature 90° C, max. operating pressure 10 bar[2] Housing completely made of aluminium plate incl. mounting frame [6][3] Water connection with R ¾", torsion protection[4] Condensate tray to collect condensate in dehumidification mode[5] Condensate drain, G ½”, mounted on the condensate tray and supplied as standard[6] Mounting frame made of galvanized steel sheet, supplied as standard

InstallationThe mounting frame is used to install the cooling unit in front of the fall duct wall.


Subject to modifications


** see order key on page 2 *** Unit weight + water content

11

11.1

Series AISI + AASIDesign | Specification | Dimensions

AISI 33/51** seriesDesign

[1] Air cooler made of copper pipes with aluminium fins, max. operating temperature 90° C, max. operating pressure 10 bar[2] Housing completely made of aluminium plate incl. mounting frame [6][3] Water connection with R ¾”, torsion protection[4] Condensate tray to collect condensate in dehumidification mode[5] Condensate drain, G ½”, mounted on the condensate tray and supplied as standard[6] Mounting frame made of galvanized steel sheet, supplied as standard

InstallationThe cooling unit is installed in the fall duct for the cold air (see page 8).


Part.no. AISI …/…** 08 10 12 14 16 18 20 22 24



Total weight*** (33) ≈ [kg] 15 18 20 23 25 29 31 33 37

Total weigth*** (51) ≈ [kg] 20 23 27 29 33 36 39 42 45

11.2

Part.no. AASI …/…** 08 10 12 14 16 18 20 22 24



Total weight*** (33) ≈ [kg] 15 18 20 23 25 29 31 33 37

Total weigth*** (51) ≈ [kg] 20 23 27 29 33 36 39 42 45



AASI 33/51** seriesDesign

[1] Air cooler made of copper pipes with aluminium fins, max. operating temperature 90° C, max. operating pressure 10 bar[2] Housing completely made of aluminium plate incl. mounting frame [6][3] Water connection with R ¾”, torsion protection[4] Condensate tray to collect condensate in dehumidification mode[5] Condensate drain, G ½”, mounted on the condensate tray and supplied as standard[6] Mounting frame made of galvanized steel sheet, supplied as standard

InstallationThe mounting frame is used to install the cooling unit in front of the fall duct wall.




345

(525

)*70

153

2

1

3050

5

L�nned

Lnom -23 mm

4

6

3

visible side

178

100(150)*

153

345

(525

)*

1

30

178

50

4

70

2

L�nned

Lnom -23 mm

6

3

visible side

5ca. 200

5

inside

100(150)*

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Series ISHK | Cooling/HeatingDesign | Specification | Dimensions

12

Specification of series ISHK

GraviVent® Type s ISHK are espacially designed for a silent cooling with less temperatur gradient.

Design · Air cooler made of copper pipes with aluminium fins · max. operating temperature 90°C · max. operating pressure 10 bar · other operatung conditions possible, but have to be agreed with TTC

· 2-pipe-system · 1 or 2 loops selectable to adjust the specific pressure drop (see diagramm below)

· Housing complet e made of aluminium · Water connection with ½“ external thread from left or right side possible

· Condensate tray (only to collect some drops of condensate!) · Condensate drain, D=12mm mounted on the condensate tray and supplied as standard

Installation · A special bar is supplied as standard and will be mounted to the wall; the ISHK has to be installed on top of this bar and has to be fixed at the wall.

Important · To ensure optimum operation sealing off walls spaced at 600–800mm need to be installed in the fall duct.

· Water quality has to be according to VDI 2035. · The minimum heigth for air inlet and air outlet of the fall duct have to be 0,15m²/m ISHK to ensure to reach the capacity in the diagram beside.

· It is possible to use grills for housing the air inlet or air outlet but then you need the 0,15 m²/m free area too.

500

= =

60

32

total unit length

3015ø 5.2

½”ag

1503045

min. 150

min. 100

500

serv

ice

hatc

h

ø 12 x 30

active fall duct height

min. 150

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12.1

130010008007006005004003001501002

3

4

5

6

7

89

10

15

20

200

24 20121416180830

40

10

22

spec

if. c

oolin

g ca

paci

ty [W

/m]

Specif. cooling capacitiy category 2

effe

ctiv

e fa

ll du

ct h

eigh

t [m

]

spec

if. p

ress

ure

drop

[kPa

/m]

Specif. pressure drop of ISHK capacity category 2

water mass flow mw [kg/h]Average temperature difference ∆m [K]

13

Series ISHK | Cooling/HeatingPart no. | Capacity category 2

Part no. ISHK …** 0851 1051 1251 1451 1651 1851 2051 2251 2451


Total length Lnom [mm] 800 1000 1200 1400 1600 1800 2000 2200 2400

Total weight*** (55) ≈ [kg] 9 11 13 15 17 19 21 23 25

Water content ≈ [kg] 2,5 3 3,5 4 4,5 5 5,5 6 6,5

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spec

if. h

eatin

g ca

paci

ty [W

/mfin

ned]

Heating capacities ISHK 51

∆m [K]13.3


∆m[K] = Average temperature difference between two different mediatR [°C] = Room temperaturetW1 [°C] = Water inlet temperature tW2 [°C] = Water outlet temperaturem· W[kg/h] = Water volume flowQ·

K(tot) = Total cooling capacity of a hilled beam q· K(specif)[W/m] = Cooling power per metre of finned chilled beam length (L(finned))(L(finned)) [m] = L(tot)[m] - 0,2 m∆pW(tot)[kPa] = Total pressure drop of a chilled beam∆pW(specif)[kPa/m] = Specific pressure drop of 1 m finned chilled beam length (L(finned))

14

Series AASS/AAVS/AISI/AASI | Cooling/HeatingCapacity Charts Category 1

900

800

700

600

500

400

300

200

100

1600

1500

1400

1300

1200

1100

1000

2,5 m

3,0 m

4,0 m

5,0 m

3,5 m

1700

2,0 m

1,5 m

6 8 9 10 11 12 13

280

2,2 m

7

Average temperature difference ∆m [K]

spec

if. c

oolin

g ca

paci

ty q·

spec

if [W

/m]

Specif. cooling capacity category 1 [qK(spec)]

spec

if. p

ress

ure

drop

∆p· w

spe

cif [

kPa/

m]

Specif. water-sided pressure drop category 1

Formula 3 Calculating the total cooling capacity QKtot (1 unit)

Formula 4 Estimating roughly the water volume flow mw

Formula 1 Calculating the average temperature difference ∆m

for cooling mode

Water mass flow mw [K]

Q· K(tot)[kW] = q ˙K(specif)[W/m] · L(finned)[m]

q (spezif) [kW/m] · L(finned)[m]tW2 - tW1 [K]mW[kg/h] = 860 ·

tW1 [°C] + tW2 [°C]2∆m[K] = tR -

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14.1

14.2 Baugröße 33

2

3

4

5

6

7

8

9

10

15

20

30

40

13001000800700600500400300150100 200

24

201214 0810

22

18 16

15

Series AASS/AAVS/AISI/AASI | Cooling/HeatingCapacity Charts Category 2

900

800

700

600

500

400

300

200

1600

1500

1400

1300

1200

1100

1000

2,5 m

4,0 m

3,5 m

3,0 m1700

1800

1900

2000

2,0 m

1,5 m

2100

2200

6 8 9 10 11 12 13 14 15 16

2300

2400

5,0 m

2500

2600

435

2,2 m

7

Average temperature difference ∆m [K]

spec

if. c

oolin

g ca

paci

ty q·

spec

if [W

/m]

Specif. cooling capacity category 2 [qK(spec)]

spec

if. p

ress

ure

drop

∆p· w

spe

cif [

kPa/

m]

Specif. water-sided pressure drop category 2

Water mass flow mw [K]

∆m[K] = Average temperature difference between two different mediatR [°C] = Room temperaturetW1 [°C] = Water inlet temperature tW2 [°C] = Water outlet temperaturem· W[kg/h] = Water volume flowQ·

K(tot) = Total cooling capacity of a hilled beam q· K(specif)[W/m] = Cooling power per metre of finned chilled beam length (L(finned))(L(finned)) [m] = L(tot)[m] - 0,2 m∆pW(tot)[kPa] = Total pressure drop of a chilled beam∆pW(specif)[kPa/m] = Specific pressure drop of 1 m finned chilled beam length (L(finned))

Formula 3 Calculating the total cooling capacity QKtot (1 unit)

Formula 4 Estimating roughly the water volume flow mw

Formula 1 Calculating the average temperature difference ∆m

for cooling mode

Q· K(tot)[kW] = q ˙K(specif)[W/m] · L(finned)[m]

q (spezif) [kW/m] · L(finned)[m]tW2 - tW1 [K]mW[kg/h] = 860 ·

tW1 [°C] + tW2 [°C]2∆m[K] = tR -

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15.1

15.2 Baugröße 5110 08 16 14

12 +

24

18 +

20

22

2

3

4

5

6

7

8

9

10

15

20

30

40

13001000800700600500400300200

16

The TaskAn office (see page 15 Fig. 15.1) with a sensitive cooling load Q· K(sen) = 2.000 W is to be cooled with AASS or AAVS series cooling units and also be ventilated with additional, pre-conditioned primary air. The unit is to be installed above a range of cupboards or a set of shelves at a height of 2.5 m, see Fig. 15.1. The room volume is approx. 80 m³.The pre-conditioned primary air is blown into the room at 18°C through flexible pipes in the fall ducts.

· Cold water temperatures: tW1 = 16°C and tW2 = 20°C · Room temperature: tR = 26°C · Primary air temperature: tL(prim)= 18°C · Max. possible installation length Lmax for the cooling unit(s) = 5.50 m · The primary air rate V· L(prim) is 240 m³/h at 3 times room air change · The sound pressure level shall not exceed 30 dB(A) · Effective fall duct height Heff ≈ 2.2 m

The Solution (explained step-by-step)1. Calculating the average temperature difference with formula 1 (pages12/13):

2. Calculating the specific cooling capacity q·K(specif): · Category »1« (Fig. 12.1) determins ∆m = 8 K = q· K(specif) = 280 W/m · Category »2« (Fig. 13.1) determins ∆m = 8 K = q· K(specif) = 435 W/m

This results in:a) required finned length Lfinned for category 1 = 2000 W : 280 W/m ≈ 7.15 mb) required finned length Lfinned for category 2 = 2000 W : 435 W/m ≈ 4.60 m

Conclusion: · Due to structural restrictions (max. 5.5 m) the length required under a) Lfinned = 7.15 m cannot be used

· The length calculated under b) Lfinned = 4.6 m meets the requirement

3. Select the required TTC cooling units · Max. available TTC cooling unit Ltot = 2.4 m with Lfinned = 2.2 m · To fulfill the requirement you will need 2 TTC capacity category 2 cooling units

2 units AASS.24.51.2._.2 (see order key on page 2)

4. Calculating the actual water-sided cooling capacity:

Q· K(tot)[W] = q ˙specif[W/m] · L(finned)[m] · n[units] = 435 W/m · 2.32 m · 2 ≈ 2020 W = 2.02 kW (needed 2,000 kW)

5. Calculating the additional cooling capacity of the primary air:

6. Total cooling capacity on the water and air side:

Q· K(water, air) = 2.02 kW (step 4) + 0.64 kW (step 5) = 2.66 kW

Other calculation criteria >

Calculate ∆m >

Determine q· K(specif.) >

Required finned length Lfinned >

Required TTC cooling units >

Water-sided cooling capacity >

Result >

Cooling power of primary air >

Total cooling power >

Please note > If TTC gratings are used as air inlets and outlets (see page 16) the cooling power calcu-lated under point 4 must be multiplied by the correction factors in Fig. 16.1–16.7.

Design Example Calculating a Cooling Unit for Cooling Mode

(tW1 + tW2)°C2

∆m[K] = tR - = 26 - 16°C + 20°C2

= 8 K

V·L(tot) [m³/h] · pL [kg/m³] · cpL [kJ/kg·K] · ∆tL [K]3600Q· K(air)[kW] =

240 (m³/h) · 1.2 (kg/m³) · 1 (kJ/Kg·K) · 8 (K)3600Q· K(air)(kW) = = 0.64 kW

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Design Example Illustration of the system

17

Illustration of the system calculated in examples 1 and 2

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2

1

5

3

4

2

2200

300

3

13

5500

3300

1

ALKey to Fig. 15.1

[1] Air cooler with condensation tray[2] Fall duct for cold air [3] Air outlet grating[4] Air inlet grationg[13] Primary air channel[AL] Sealing batten against infiltrated air

Note:For other free cross-sections of the air inlet and air outlet gratings please refer to page 16 or contact TTC.

17.1

Rodspacing »a«

[mm]

Freecross-sect.

[%]AASS33

AASS51

AAVS33

AAVS51

AISI33

AISI51

AVSI33

AVSI51

Longitudinal grating rigid (full

profile) made of aluminium, for 20 88 0,94 0,84 0,94 0,84 0,94 0,84 0,94 0,81

air inlets and outlets in ceilings, 15 83 0,93 0,82 0,93 0,82 0,93 0,82 0,93 0,82

walls and on the floor 10 77 0,92 0,81 0,92 0,81 0,92 0,81 0,92 0,81

Part no. TTC-LSF ❏ AluComb grating rigid (full profile)

made of aluminium or V2A, for 20 87 0,94 0,83 0,94 0,83 0,94 0,83 0,94 0,83


walls and on the floor 10 77 0,92 0,81 0,92 0,81 0,92 0,81 0,92 0,81

Part no. TTC-KSF ❏ Alu ❏ V2AComb grating rigid (T-profile)

made of aluminium, for air inlets 20 80 0,92 0,82 0,92 0,82 0,92 0,82 0,92 0,82

and outlets in ceilings, walls 15 73 0,91 0,80 0,91 0,80 0,91 0,80 0,91 0,88

and on the floor 10 65 0,88 0,78 0,88 0,78 0,88 0,78 0,88 0,78

Part no. TTC-KST ❏ AluComb grating rigid (U-profile)

made of aluminium or V2A, for 15 73 0,91 0,80 0,91 0,80 0,91 0,80 0,91 0,80


walls and on the floor

Part no. TTC-KSZ ❏ Alu ❏ V2A

Air Inlet and Outlet Gratings Part No. | Reduced Performance Factors

18

Reduced performance of the TTC air outlets in conjunction with TTC cooling units

a

a

a

a

Roll grating flexible (hollow) 17,5 70 0,81 0,71 0,81 0,71 0,81 0,71 0,81 0,71

aus Aluminium oder V2A, for air 16 65 0,79 0,70 0,79 0,70 0,79 0,70 0,79 0,70

outlets on the floor 12,5 62 0,79 0,69 0,79 0,69 0,79 0,69 0,79 0,69

Part no. TTC-QFH ❏ Alu ❏ V2ARoll grating flexible (T-profile) 20 80 0,83 0,74 0,83 0,74 0,83 0,74 0,83 0,74

made of aluminium, for air 15 70 0,81 0,71 0,81 0,71 0,81 0,71 0,81 0,71

outlets on the floor 10 65 0,79 0,70 0,79 0,70 0,79 0,70 0,79 0,70

Part no. TTC-QFT ❏ AluRoll grating flexible (T-profile)

made of aluminium, for air 8 40 0,71 0,61 0,71 0,61 0,71 0,61 0,71 0,61

outlets on the floor

Part no. TTC-BFT ❏ Alu

a

a

aa

Reduced perfomance factors »f«

All figures are based in the cooling unit and the air outlet grating being identical in length.The heights of the cooling units are for a grating height of 200 mm in line with the preliminary documentation.

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18.1

18.2

18.3

18.4

18.5

18.6

18.7

Note:The cooling power of the cooling unit in the diagrams on pages 12/13 must be corrected by the reduced performance factors »f« stated in the tables Fig. 16.1–16.7 if the above air inlet and outlet gratings are used. The reduced performance factors »f« are dependent on the type and the free cross-section of the gratings. The following formula ist to be used:

Q· K(reduced) = Q· K(1 unit) · fin · fout

Q· K(reduced) = reduced cooling capacityQ· K(1 unit) = calc. cooling capacity per unitfin = inflowing room air fout = outflowing cooling air

ExampleQ· K(1 unit) = 1,01 kW (s. example on page14)

fin = 0,82 (Fig. 16.3, AAS 51 series)fout = 0,82 (Fig. 16.3, AAS 51 series)

Q· K(reduced) = 1,01 kW · 0,82 · 0,82 ≈ 0,68 kW

Control of cooling capacity2 x AASS = 1,36 kWCooling cap. of inflowing prim. air = 0,64 kWTotal of cooling capacity 2000 W = 2,0 kW

~

A

B

C

DE

F

G

H

G~~

ED

A

C

B

H

F FE

≈ 250

B

G

~

A

A

C

E

H

FDI

D

C

B

F

H

~ ~

A A

H

F

EI

A

Instruction for Pipe Work Installation

19.1 19.2

19.3 19.419

Example of a pipe wirk installation for AASS cooling unit Example of a pipe wirk installation for AISI cooling unit

Example of a pipe wirk installation for AAVS cooling unit Example of a pipe wirk installation for AASI cooling unit

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A Cold water supply (do not install these in front of the air cooler)B Stop valves for forward and return flowC Electrical control valve D Sealing off walls in the fall duct for the cooling air

E Siphon to drain condensationF Side seals on the cooling unit against infiltrated airG Flexible connecting hosesH Relief valve


E Siphon to drain condensationF Side seals on the cooling unit against infiltrated airG Flexible connecting hosesH Relief valve


E Siphon to drain condensationF Side seals on the cooling unit against infiltrated airG Flexible connecting hosesH Relief valveI Mounting frame supplied as standard


E Siphon to drain condensationF Side seals on the cooling unit against infiltrated airG Flexible connecting hosesH Relief valveI Mounting frame supplied as standard

The calculated performance will not be achieved with this installation. Air infiltration will not be possible.

The calculated performance will not be achieved with this installation (air turbulences).

The calculated performance will not be achieved with this installation (problems with infiltrated air).

Best Performance by Reducing Infiltrated Air

600–800 mm

1 122

3

600–800 mm

1 122

3

600–800 mm

1 122

3

20

Design of side sealing off walls and fall ducts

CorrectInstallation

IncorrectInstallation

Falschluft Falschluft Falschluft


Installation in front of ducts

The cooling unit has been correctly installed; no reduction in performance.[1] Side sealing off walls[2] Fall ducts correctly arranged

The cooling unit is too big; the calculated performance will not be achieved with this installation. [1] Side sealing off walls[2] Fall ducts walls correctly arranged

The cooling unit is too big; the calculated performance will not be achieved with this installation. [1] Side sealing off walls[2] Fall ducts walls correctly arranged

600–800 mm

1 122

3

600–800 mm

1 122

3

1 1

3



Airturbulences

Infiltrated air

Infiltrated air


The cooling unit is too small; the calculated performance will not be achieved with this installation. [1] Side sealing off walls[2] Fall ducts walls incorrectly arranged

The cooling unit is too small; the calculated performance will not be achieved with this installation. [1] Side sealing off walls[2] Fall ducts walls incorrectly arranged

The fall ducts have not been installed; the calculated performance will not be achieved with this installation. [1] Side sealing off walls

Airturbulences

Unstable air flowdue to lack of fall duct walls

100(150)*

100(150)*

100(150)*

CorrectInstallation



20.1 20.2 20.3

20.4 20.5 20.6

20.7 20.8 20.9

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Calculation and Order Sheet

21

Calculation Parameters

Calculation of the required cooling unit

Calculating the water-sided pressure difference

Company

Address

Project

Contact Person

Position

Direct Dial

Fax

Email

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1 Req. sensible cooling capacity Q· K(sens) [W]

2 Clear room height hclear [m]

3 Clear room width bclear [m]

4 Clear room length lclear [m]

5 Room volume [m³]

6 Effective fall duct heigth Heff [m]

7 To be installed >

8 Max. width for cooling unit(s) W(tot) [m]

9 Max. height for cooling unit(s) H(tot) [m]

10 Cold water inlet tw1 [°C]

11 Cold water outlet tw2 [°C]

12 Room temperature tR [°C]

13 Primary air temperature tL(in) [°C]

14 Primary air volume flow V· L(in) [m³/h]

15 Max. sound pressure level for pr.air [dB(A)]

W

m

m

m

m³

m

❏ Cupb./shelve ❏ in front of/above ❏ in fall duct

m

m

°C

°C

°C

°C

m³/h

dB(A)

With regard to the whole of the room

hclear · bclear · lclear

See page 5, Fig. 5.1

Please check as appropriate

With reference to the installation space

With reference to the installation space

See page15, Fig. 15.1

16 Average temperature difference ∆m [K]

17 Specif. cooling capacity q· K(specif) [W/m]

18 Total ripped length required Lfinned [m]

19 Specif. cooling capacity q· K(specif) [W/m]

20 Total ripped length required Lfinned [m]

21 Select no. of cooling unit(s) required [n]

22 Req. length Lfinned for 1 cooling unit [m]

23 Cooling capacity Q· K(1 unit) (1 unit) [W]

24 Corrected cooling capacity Q· K(1 unit) [W]

25 Cooling capacity Q· K(air) from V· L(in) [kW]

K

> for cat. 1: W/m

> for cat. 1: m

> for cat. 2: W/m

> for cat. 2: m

n

m

W

W

kW

Item 12 - [Item 10 + Item 11 : 2]

From Fig. 12.1 (see page 12)

Item 1 : Item 17

From Fig. 13.1 (see page 13)

Item 1 : Item 19

See tables on pages 10/11

Item 18 or Item 20 : Item 21

Item 17 or Item 19 : Item 22

See tables on page 16

Item 14 · 0.0003 · (Item 12 - Item 13)

26 Water mass flow m· W [kg/h]

27 Spec. water-sided pr. drop ∆pW(specif) [kPa/m]

28 Total pressure drop ∆pW(tot) [kPa]

kg/h

kPa/m

kPa

860 · [Item 23 (in kW) : Item 10]

See tables on pages 12/13

Item 22 · Item 27

Important for your order

Part no. for cooling unit (see page 3)

Series

Make: TTC Timmler Technology GmbH

Christian-Schäfer-Str. 8

D-53881 Flamersheim

Part no. for air inlet grating

Series



D-53881 Flamersheim

Part no. for air outlet grating

Series



D-53881 Flamersheim

Developing innovative solutionsfor new buildings and redevelopment projectsin close co-operation with architects and plannersAssisting architects and planners to develop customized solutions during the planning phase is just one of the strengths of TTC Timmler Technology.TTC supplies intelligent buildings technology for contemporary residential and work environ-ments: LED lights, innovative air conditioning systems, design-oriented façade components and gratings for both interior and exterior applications. Our know-how and many years experience let you combine modern design, energy efficiency and economic viability. Whatever your technical requirements, we design customized solutions consisting of standard components or tailor-made components, produced to your specifications.

Kind to the environment and economically viablePeople and the environment are at the heart of TTC’s philosophy. We develop natural air conditioning systems that are both energy and cost efficient.

Multi-functionalityUse our know-how to enhance your designMulti-functionality is a particularly strong point of TTC buildings technology. To name just a few examples:

• LED Lightdesign – As with TTC gratings you can also use TTC Lighttools in our mainte-nance platforms to create a stunning illumination and to put your design into the »lime-light«. The options TTC Lightdesign is offering are as versatile as your ideas: From Façade space lights, Power LEDs, LED light lines and tiles to wall washers – with individual designs and a wide range of materials we can deliver customized solutions for your projects.

• TTC Modultherm is the ideal system to noiseless air condition whole buildings cost efficiently, using the natural force of gravity.

• TTC Chilled Beams ensure an air conditioning with high comfort an very low noise in working areas. In arrangement with the architect chilled beams add themselves into the design of the ceiling.

• TTC Floorunits with different functionalities of heating, cooling and ventilation provide the free view through space high glass façades. These products combine design with func-tionality an energy efficiency.

• Homogeneous grating systems allow a seamless transition between the interior and the exterior design of a building. On the inside TTC Under Floor systems provide solutions for all your heating, cooling and ventilation requirements and on the outside they comple-ment the TTC Façade Drainage systems.

• Filigree sun protection systems on the façade provide openness and transparency.

TTC Timmler Technology

TTC Timmler Technology GmbH

Christian-Schäfer-Str. 8 | D-53881 FlamersheimTel +49(0)2255 921-0 | Fax +49(0)2255 [email protected] | www.ttc-technology.eu

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