infrared unit heater - nicor · design and application approximate tube temp across tube system 60...
TRANSCRIPT
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Infrared Unit Heater Fundamentals
Presented by:
November 13, 2014
Shonda Biddle, energySMART
Jamie Tuinstra, Modine Manufacturing Company
Special guest: Modine
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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?
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• Nicor Gas serves over 2 million customers in 643 communities.
Nicor Gas service area
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How are the programs funded?
Residential and commercial Nicor Gas customers, based on consumption
About energySMART
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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
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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.
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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
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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
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• 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
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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
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Jamie Tuinstra, Modine Manufacturing Company
Infrared unit heaters
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Infrared unit heaters
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•Basics – What is infrared – Why use infrared
•Product features and benefits – High-intensity heaters – Low-intensity heaters
•Design & applications
Infrared unit heaters
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Types of heat transfer
•Conduction - no motion – Handle on a pan
•Convection - currents – Boiling water
•Radiation - rays – Campfire
Infrared unit heaters
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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
Infrared unit heaters
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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
Infrared unit heaters
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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
Infrared unit heaters
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Unit Specifics
Infrared unit heaters
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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
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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
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Ignition Controller
Manifold
Gas Orifices
Burner Assembly
Gas Valve
Model MHR - Features High intensity infrared
Spark Electrode
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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°
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• 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
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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
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• 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
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•Chain Mounting Sets with “S” Hooks – 20’ chain (MHR & TLP) – 40’ chain (TLP)
Low intensity infrared Model TLP – Unit Mounting
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High & low intensity infrared
•Applications •Selection •Additional Considerations
Design and application
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•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
Design and application
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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
Design and application
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Typical applications
• Aircraft hangars • High ceilings/air changes
• Loading docks
• Spot heating/open doors
• Warehouses
• High ceilings/limited occupancy
• Manufacturing areas
Design and application
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Typical applications
• Fire stations • Open doors/air changes
• Automotive service stations • Open doors/air changes
• Car washes • Open doors/air changes
Design and application
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Typical applications •Service counters
•Outdoor Restaurant Seating •**Big Opportunity**
Design and application
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Typical applications
•Airplane hangers
Design and application
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Typical applications
•Factories (especially old drafty w/high ceilings)
Design and application
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Typical Applications
•Warehouses/cold storage
Design and application
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Typical applications
•Service bays
Design and application
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Typical (Mis) applications
Design and application
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Typical misapplication
Greenhouses: • Dirt floors • Plants may be
intolerant to infrared heat
• Lack of uniform heat distribution
• Clearance issues to house materials
Design and application
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Typical misapplications
Animal shelters/barns: • Animals cannot voice discomfort • May stress animals • Poor production
Design and application
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High & low intensity infrared
•Applications •Selection •Additional considerations
Design and application
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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
Design and application
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Criteria for proper selection •Area of coverage
– High Intensity
Design and application
30°
30°
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Criteria for proper selection
•Area of coverage – Low intensity
Design and application
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Criteria for proper selection
• 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
Design and application
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
Approximate Tube Temp Across Tube System60 Foot Straight Tube
200
400
600
800
1000
0 10 20 30 40 50 60
Feet from Burner
°F
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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:
Design and application
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Selection & layout
• Using a 60 foot straight tube system:
Design and application
Approximate Tube Temp Across Tube System60 Foot Straight Tube
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!
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Selection & layout
• Using (2) – 30 foot straight tube systems:
Design and application
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.
It’s so nice and warm at work, I could handle cold fish all day.
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
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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.
It’s so nice and warm at work, I could handle cold fish all day.
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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
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Criteria for proper selection
• Building layout – Lighting – Racked/stacked combustible material – Clearance to combustibles based on 90°F over ambient – Sprinkler heads – watch clearances!!! – Overhead cranes – Utility location
Design and application
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High & low intensity infrared
•Applications •Selection •Additional considerations
Design and application
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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
Design and application
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Additional considerations
•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
Design and application
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Additional considerations
• 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)
Design and application
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Additional considerations
•Indoor or outdoor?
Design and application
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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
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Thank you!
Shonda Biddle Nicor Gas energySMART [email protected] 312.607.3978 Jamie Tuinstra Product Manager [email protected] 262-636-1850.