infrared unit heater - nicor · design and application approximate tube temp across tube system 60...

Infrared Unit Heater Fundamentals

Presented by:

November 13, 2014

Shonda Biddle, energySMART

Jamie Tuinstra, Modine Manufacturing Company

Special guest: Modine

Infrared Unit Heaters - Fundamentals • energySMART overview

• Rebates for your infrared unit heaters • Rebates and incentives for energy efficiency upgrades

• Special Guest: Jamie Tuinstra, Product Manager,

Modine Manufacturing Company • What are infrared unit heaters? • What are ideal applications? • How do they save energy?

• Nicor Gas serves over 2 million customers in 643 communities.

Nicor Gas service area

How are the programs funded?

Residential and commercial Nicor Gas customers, based on consumption

About energySMART

energySMART rebates are available through May 31, 2015* or until funds are exhausted. Please Note: Rebate must be submitted within 90 days of installation date or by June 30, 2015, whichever comes first.

energySMART dates

Rebates available Project Rebate

Steam traps commercial (<15 psig)

$50 per trap

Steam traps industrial/process (≥15 psig)

$300 per trap

Boiler controls $0.50 per MBH, up to $1,500

Boiler tune-ups

$0.40 - $0.50 per MBH up to $1,500

Pipe insulation

$4.00 / linear foot – indoor $8.00 / linear foot - outdoor

Ozone laundry

$25 per pound of washer capacity

Pool / spa covers $0.75 - $1.25 per sq. ft.

Rebates available Project Rebate Programmable thermostats $50 per unit

Condensing boilers (AFUE/TE ≥90%)

$500 - $7,500

Non-condensing boilers (AFUE/TE ≥85%)

$400 - $2,500

Furnaces (≥92%) $300 - $400

Storage water heaters

$150 - $200

Condensing unit heaters

$325

Infrared heaters

$700

Rebates available – Commercial Food Services Project Rebate Pre-rinse spray valves $50 per unit

Fryers

$500 - $550

Ovens $400 - $1,400

Conveyor oven $500 – 1,000 per deck

Infrared charbroiler $500

Other commercial food service equipment

Varies

• For natural gas-saving projects not addressed by rebates.

• Incentives based on the amount of natural gas (in therms) saved in first year by completing the project.

• Maximum incentive per project is $500,000 (cannot exceed 50% of the installed project cost).

• Pre-approval required before any work starts

Custom incentive

Project Savings Incentive Amount Incentive Cap 2,500 – 15,000 therms saved / year

$0.75 / therm saved

$500,000 / year > 15,000 therms saved / year $1.00 / therm saved

Opportunity Assessments Targeted assessment for

specific energy saving opportunities

Facility Assessments Complete analysis and

report of energy-saving opportunities

Includes prioritized savings opportunities and incentives available

Other technical assistance available

Technical assistance

Jamie Tuinstra, Modine Manufacturing Company

Infrared unit heaters

•Basics – What is infrared – Why use infrared

•Product features and benefits – High-intensity heaters – Low-intensity heaters

•Design & applications


Types of heat transfer

•Conduction - no motion – Handle on a pan

•Convection - currents – Boiling water

•Radiation - rays – Campfire


What is infrared?

• Radiant energy travels in line-of-sight

– Heats upon striking object – If not line-of-sight, object won’t be

heated

• Objects warmed by IR provide heat

– Secondary effects • Conduction to other objects • Convection to air


Benefits

•Quiet/clean – No air movement / blowing of dirt or dust

•Low maintenance – Few moving parts

•Installation – No ductwork

•Excellent for zone or spot heating


Benefits

• Energy cost reduction – Objects are heated, not the surrounding air – No air mover energy costs – Lower thermostat settings

• Quick temperature recovery – Continues to heat objects when doors are open


Unit Specifics


Model MHR - Features

• Natural or Propane Gas • 30,000 to 200,000 Btu/hr • Unvented Operation • Direct Spark and Millivolt • 1- and 2-Stage Gas Controls • Tile temperatures Up To 1850°F • 115V or 24V Supply (Except Millivolt) • Indoor use only!

High intensity infrared

Note: Units must always be installed with controls on the bottom.

16 Gauge Aluminized Steel

Frame

Polished Aluminum Reflector

Ceramic Burner

Spark Electrode

Model MHR - Features High intensity infrared

Full Perimeter Tile Retention

Frame

Ignition Control & Gas Valve

Serial Plate

Ignition Controller

Manifold

Gas Orifices

Burner Assembly

Gas Valve

Model MHR - Features High intensity infrared

Spark Electrode

Model MHR – Unit Mounting

• Rigid mounting • 3/8” threaded rods • Where code allows,

chain mounting • 0°-30° mounting

angle • Manifold at bottom • Utilities not to cross

over top

High intensity infrared

0° to 30°

• Pressurized system • Natural or propane • 50,000 to 200,000 Btu/hr Input • Indoor or outdoor • Straight or U-tube systems (20-70’) • Vented • 115 V supply & 24 V controls • Service friendly • Conversion kits

Model TLP - Features

Low intensity infrared

Hot Surface Igniter & Flame

Sensor

Enclosed Burner

Compartment

180° Rotate-able Gas Valve

Terminal Board

Combustion Blower

Flame Sight Glass

Hanging Access Doors

Model TLP – Burner Features

Low intensity infrared

20 gauge aluminized steel casing, baked-on polyester powder

coat paint

Combustion Airflow Indicator

Light

• 16 Ga. darkened aluminized steel* tubes – Improved corrosion resistance for longer life – Heat treated for darkness (better heat transfer) – Doesn’t flake or scratch like painted tubes

*For units rated 150,000 Btu/hr and up: – First tube is 16 Ga. Titanium Aluminized Steel (not heat

treated) with stainless steel clamps

Low intensity infrared LOW INTENSITY INFRARED Model TLP – Tube System Features

•Chain Mounting Sets with “S” Hooks – 20’ chain (MHR & TLP) – 40’ chain (TLP)

Low intensity infrared Model TLP – Unit Mounting

High & low intensity infrared

•Applications •Selection •Additional Considerations

Design and application

•When to use infrared: if impractical/costly to heat large air volumes

– Where only people need to be warm

– Small section within a large building

– Near frequently opened doors

– High ceilings


Typical applications

Our focus: • Partial building heat

• Assembly line

• Spot/area heating • Single work cell • Door coverage

• Commercial/industrial

Not our focus – will not discuss (See 9-200) • Total building heat

• Entire space



• Aircraft hangars • High ceilings/air changes

• Loading docks

• Spot heating/open doors

• Warehouses

• High ceilings/limited occupancy

• Manufacturing areas



• Fire stations • Open doors/air changes

• Automotive service stations • Open doors/air changes

• Car washes • Open doors/air changes


Typical applications •Service counters

•Outdoor Restaurant Seating •**Big Opportunity**



•Airplane hangers



•Factories (especially old drafty w/high ceilings)


Typical Applications

•Warehouses/cold storage



•Service bays


Typical (Mis) applications


Typical misapplication

Greenhouses: • Dirt floors • Plants may be

intolerant to infrared heat

• Lack of uniform heat distribution

• Clearance issues to house materials


Typical misapplications

Animal shelters/barns: • Animals cannot voice discomfort • May stress animals • Poor production



•Applications •Selection •Additional considerations


Criteria for proper selections

Application • Indoor or outdoor?

– High intensity is indoor only • Spot heating or partial building area heating

– Typical: spot=high intensity, area=low intensity Mounting height • Clearance to combustibles

– Typical: more=high intensity, less=low intensity Building layout


Criteria for proper selection •Area of coverage

– High Intensity


30°

30°

Criteria for proper selection

•Area of coverage – Low intensity



• Understanding tube temperature profile • Typically around 1000°F at burner • Typically around 350 to 400°F at vent end • Radiant output is directly proportional to (∆T)4


Approximate Tube Temp Across Tube System30 Foot Straight Tube

200

400

600

800

1000

0 5 10 15 20 25 30 35

Feet from Burner

°F


200

400

600

800

1000

0 10 20 30 40 50 60

Feet from Burner

°F

Selection & layout

• Partial building heating • Low intensity best suited • Mount within recommended mounting height • U-tube system recommended: Why?

Let’s look at a 60’l assembly line example:


Selection & layout

• Using a 60 foot straight tube system:



200

400

600

800

1000

0 10 20 30 40 50 60

Feet from Burner

°F

I agree, it’s so nice, I feel productive.

It’s so freaking cold over here, that heater above is junk.

It’s so nice and warm at work, I could handle cold fish all day.

Not a good application Be prepared for service calls!

Selection & layout

• Using (2) – 30 foot straight tube systems:


A fairly good application

It’s not bad, but I wish that heater worked better.

I’m really happy my employee cares enough to keep me warm.


Approximate Tube Temp Across Tube SystemQty (2) - 30 Foot Straight Tubes

200

400

600

800

1000

0 10 20 30 40 50 60

Feet from Burner

°F

Selection & Layout

• Using (2) – 60 foot u-tube systems:

DESIGN AND APPLICATION

A very good application

Approximate Tube Temp Across Tube SystemQty (2) - 60 Foot U-Tubes

200400600

8001000

0 10 20 30 40 50 60

Feet from Burner

°F

It’s really comfortable in here, I feel so productive.

I’m really happy my employee cares enough to keep me warm.


Selection & Layout

•Spot heating – High intensity @ 30° mounting angle – Low intensity u-tube @ 45° mounting angle – Typically uses 2 units where practical

DESIGN AND APPLICATION

MHR 30

MHR 60

MHR100

MHR160

MHR120


• Building layout – Lighting – Racked/stacked combustible material – Clearance to combustibles based on 90°F over ambient – Sprinkler heads – watch clearances!!! – Overhead cranes – Utility location



•Applications •Selection •Additional considerations


Additional considerations

• Low-intensity tube system expansion – Systems can expand/contract by 1-6” – Installation must accommodate to avoid alignment

issues

• Expansion remedies – Chain-mounting (min. Length per I&S manual) – Flexible gas connectors – Tighten tube clamps to 50 ft-lb. – Overlap reflectors by 4” – Every other joint screwed



•Thermostat location – Never in line-of-sight – Can also use simple on/off switch

•Multiple unit wiring to one thermostat (9-410) •Contaminated atmospheres

– Never for hazardous areas!!

•Negative pressure in space – High intensity – Low intensity with outside combustion air



• Indoor vs. Outdoor defined – Outdoor: area ALWAYS exposed to outdoor ambient

conditions (i.e. no door to structure) – Indoor: area SOMETIMES or NEVER exposed to

outdoor ambient conditions (i.e. opening/closing door)



•Indoor or outdoor?


Shonda Biddle Nicor Gas energySMART [email protected] 312.607.3978

Questions?

nicorgasrebates.com 877.886.4239

Jamie Tuinstra Product Manager [email protected] 262-636-1850

mailto:[email protected]


Thank you!

Shonda Biddle Nicor Gas energySMART [email protected] 312.607.3978 Jamie Tuinstra Product Manager [email protected] 262-636-1850.



infrared unit heater - nicor · design and application approximate tube temp across tube system 60...

Documents