water-days systems for grey water recycling, rain water ... · water-days dubai – frank mewes...

1Water-Days Dubai – Frank Mewes 08.07.2009

Water-DaysDubai, 07./08. July 2009

Systems for grey water recycling, rain water utilisation and ernergy savings by pumps

Frank Mewes

KSB AG, Frankenthal, Germany – Pumps and ValvesDirector Competence Center Building Service Overseaswww.ksb.com


Energy Efficient and Enviroment-friendlyProducts

Energy efficency of pumpsand systems

Systems for reducing the water

consumption

•Rain water utilisation systems

•Grey water recycling systems

Power savings of up to 60% possible


The first step towards saving energy cost

Hydraulics Selection

Impeller adjustment: Energy saving: up to 20 %

Energy efficiency of pumps and systems

Impeller Trimming

Speed Control

Motor speed adjustment-Energy saved: up to 60 %

EFF1 Motor

Standard at KSB:Efficiency gain: up to 3.5 %

EFF1 Motor

Impeller Trimming Speed Control


Increase of the effiency in details


Energy Efficiency

Better energy efficiency with the optimal motor

Efficiency gain: up to 3.5 % (only motor)


Source: Siemens catalogue D81.1 20081/2 (classification to CEMEP)

Efficiency class 1 motors

EFF1: Motors with high efficiency

EFF2: Motors with improved efficiency

EFF3: Motors with low efficiency

Compared with EFF2

motors,

EFF1 motors save up to

3.5% energy.

& more by using IE3 motors

6Water-Days Dubai – Frank Mewes 08.07.2009 6

Efficiency of motors

Source: Siemens low-voltage motors Catalogue D 81.1 · 2006

70

80

90

60

1,1

1,5

2,2

3,0

4,0

5,5

7,5

11,0

15,0

18,5

22,0

30,0

37,0

45,0

Rated power [kW]

Eff

icie

nc

y [%

]

EFF1 100% load

EFF2 100% load

3%

1.5%1.2%


Potential savings:- 3,000 kWh per annum- 300 € per annum- Approx. € 0.04 per hour

EFF1 pays off from the first minute

Motor shaft power required Pmech: 30 kW Motor load: 100% (4/4) Operating period p.a. Tyear: 7,400 h Energy costs Ken: 0.10 €/kWh Motor efficiency ηmot: EFF 2: 92.3%; EFF 1: 93.5%

Motor input power Pel: Pmech / ηmot Energy costs per annum: Pel * Tyear * Ken

EFF2

240,500 kWh

€ 24,050

EFF1

237,500 kWh

€ 23,750


Saving energy while providing

full performance

Energy saved: up to 60%

Speed control is the key to adjust

pumps to variable system

requirements.

Speed Control


Flow rate [%]

System curve(full load)

B1

Hea

d [

%]

160

140

120

100

80

60

40

20

020 40 60 80 100

20 40 60 80 100 Flow rate [%]

120

80

40

0

PW1

B2

System curve(low load)

Throttling

Excessivehead

Head required

PW2

Powersaved

Fitting a throttle valve in

the system

Influencing the system

curve through systematic

changing of the system

resistance

Pump operation at constant

speed

Energy losses up to 70 %

Flow rate adjustment by throttling: High energy losses


With speed control: Major energy savings

Diagrams: Pump and power curves

20 40 Q [%]

PW [%]

100

80

60

40

20

060 80 100

20 40 Q [%]

H [%]

160

140

120

100

80

60

40

20

060 80 100

50 %

60 %

70 %

80 %

90 %

n = 100 %

Power saved

P1

P2

System curve(full load)

B1

Head required

B2

n = 100 %

90 %80 %

70 %

60 %50 %

No excessive head , hence no waste of energy

When reducing the flow rate by decreasing the drive speed, the operating point moves along the system curve from B1 to B2

Optimum benefits with little effort and high efficiency



Speed control reduce energy cost!

13%50%

22%60%

34%70%

51%80%

73%90%

100%100%

Energy costwhen using PumpDrive

Speed and flow rate


Optimisation of single efficiencies (e.g.hyadraulics & EFF1 motors)

Selection without unnecessary reserves

Optimized impeller diameters

Sizing of piping

Piping layout specific to pump

Operating mode in line with demand

Suitable control strategies

M3~

3~

3~

M3~

3~

3~

MUp to60%

Approx. 3.5 %

Up to20%

System

Module

Components

Diverse energy savings potentials for pumps


Enviroment-friendly Products

Systems for reducing water consumption

•Rain water utilisation systems

•Grey water recycling systems


Water is not available all over the world as an endless resource


… and will be even less in the future!


Source: Source: EuropeanEuropean UnionUnion Source: TexasSource: Texas

Incl. Household

Water use by building typesWater use by end applications



Hya-Rain

Suction pipe

Rain waterstorage tank

Overflow to the sewersystem or drainage pitwith check valve

Float switch with 20 mcable (included in thescope of supply)

Main waterconnection

Rain water filter

Duct

Steadiedinflow

Overflow

A Rain Water Utilisation System

Concept

Floating suctiondevice


Where to use Rain/Service Water Utilisation Systems

• Irrigation systems• Sprinkling systems• WC-Flush• Cleaning purposes

Medium

• Clean to turbid water not containing aggressive, abrasive or solid components

A Rain Water Utilisation System


Automatic operationRain water is pumped from the storage tank.

If it is empty, the main water supply is activated automatically.

Manual operation in “storage tank” modeSystem exclusively uses rain water from the storage tank. In this mode, the storage tank may be drained for cleaning and maintenance. If it is empty, the dry-running protection is activated to protect the pump.

Manual operation in “main water” mode

System exclusively uses the main water supply even if the storage tank contains rain water. (Useful when work is being done on the storage tank).

Function of the system


Compact design

Low-noise

Easyinstallation

Economicaloperation

Rain water utilisation system

Hya-Rain

Eco-Rain


• Water from shower and bath tub...

• ...is recycled in the Grey water Unit with a complete mechanical-biological process...

• ...and reused a second time for applications that do not require drinking water quality as e.g. WC-flush, cleaning purposes, irrigation, etc.

How does grey water recycling work?

Source: Pontos GmbH

Grey Water Recycling


1. filter

2. pre-recycling and main recycling chamber

3. sediment disposal

4. drinking water back-up

supply

5. UV-lamp

6. clear water chamber

7. pressure pump/booster

8. control unit

Function

Source: Pontos GmbH

Grey Water Recycling


• Separate piping system for collection and supply pipes

• Separate ventilation of the inlet above the roof

• Overflow with integrated stench trap (overflow, sediment removal)

• Drainage of the installation room

Source: Pontos GmbH

• Installation room with

weatherproof and dry

conditions with min. 12°C

room temperature

Installation requirements

• Ventilation of the

installation room


• Biological-mechanical cleaning without Chemical additivesThe system uses the microorganisms present in the water. They break down substances such as soap and shampoo contained in the water. All this is donewithout adding chemicals or other biological substances.

• Non weather-dependentShower water is generated every day, thus ensuring a continuous supply.

• Consistent water quality thanks to patented 4-stage purification processAfter pre-filtration, the water undergoes a 2-stage biological treatment processfollowed by UV disinfection.

The quality of the recycled clear water conforms to the EU Bathing Water Directive.

• Fully automatic systemThe filter is automatically backwashed at regular intervals, thereby sucking out thesediments from stages 1 and 2.

• Low operating costsThe power consumption amounts to 1 – 1.2kW per treated cubic metre of clear water, depending on the size of the installation.

Benefits of the system

Source: Pontos GmbH


An exact calculation for the pump and using

high efficency motors and speed control systems

will reduce the energy consumption.

Systems for Rain water utilisation and

Grey water recycling reduce water consumption.

All of them help to protect our

environment!

Summary & Conclusion


KSB is a leading provider of Pumps and Valves. We offer modules and systems for transfer of liquid and solid loaded media as well as comprehensive Service.

KSB comprises:

Global Presencewith Manufacturing, Sales and Service

A broad Product Portfolioincluding complete System solutions

A strong brand,which stands for Quality, Competence and Safety

Innovation Power of a Technology LeaderQualified Human Resources with exceptional solution competence

More space for solutions.

Thank you for your attention!

water-days systems for grey water recycling, rain water ... · water-days dubai – frank mewes...

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