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8/18/2019 6D Greg Wilson

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Heat Pump Water Heaters

Applied to Commercial Kitchens


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The Technology


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Commercial Heat Pump Water Heating

If you understand how air conditionerswork, then you are familiar with the basicprocess that allows an air conditioner to

concentrate cold in one coil (inside the house)and heat in another coil (outside the house).

Refrigerators, freezers and air conditionersare all examples of heat pumps.


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Instead of dumping heat outdoors, as in anair conditioner, heat pump water heaters save

the heat for useful purposes—water heating.

Heat pump water heaters work using thissame principle.


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Heat pump water heaters do not createheat, they move heat, which is significantlymore energy efficient than other technologies.

The efficiency can be 300 to 500 times

more efficient than standard gas and electriccommercial water heaters.


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Commercial HPWH Schematic


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Performance Table

AWH-35


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Performance Table

AWH-35


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Performance Table

AWH-35


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Performance Table

AWH-35


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Performance Table

AWH-35


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Performance Table

AWH-35


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The Application

Commercial Kitchens


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Commercial Kitchen Heat Sources

Cooking equipment

Condensing side of coolingequipment

Lighting and heat lamps

Steam from dish and potwashing

Steam from stock pots


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Commercial Kitchen Hot Water Needs

Washing pots, pans, dishes and hands

Sanitizing serving and dining areas

Cooking

U it I t ll ti


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Unit Installation


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The Savings Story


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Setting the Stage

Daily hot water usage: 1,000 gallons per day

Entering water temperature: 45º F

Final tank temperature: 140º FDelta T: 95º F

Commercial Average Cost/kW: $0.0958Commercial Average Cost/Therm: $0.931


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Energy Formulas

Formulas – 1. Gallons of use per day to Btu/day

Total gallons/day X 8.346 X ΔT = Btu/Day

– 2. For our example:

1000 gallons/day X 8.346 X 95 = 792,870 Btu/Day


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Heating Water: Heat Pump Water Heater

Formulas – 1. HPWH Cost Per Day Formula:

Btu/day X Cost of Electricity kW/h = $/Day

3413 X COP X Standby Loss %

– 2. HPWH Cost Per Day Example:

792,870Btu/day X $0.0958 kW/h = $6.69/Day

3413 X 3.5 X .95

H i W El i R i


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Heating Water: Electric Resistance

Cost per Day Electric Water Heating:

– 1. Electric Water Heater Cost per Day

Btu/day X Cost of Electricity = $/Day

3413 X Standby Loss %

– 2. Electric Water Heater Cost per Day Example:

792,870Btu/day X $0.0958 kW/h = $23.43/Day3413 X .95

H ti W t N t l G


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Heating Water: Natural Gas

Cost per Day Natural Gas Water Heating:

– 1. Gas Water Heater Cost per Day:

Btu/day X Cost per Therm = $/Day

100,000 x System Eff. % X Standby Loss %

– 2. Gas Water Heater Cost per Day Example:

792,870Btu/day X $0.931Therm = $11.10/Day100,000 x .70 X .95

W t H ti C t S


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Water Heating Cost Summary

Heat Pump Water Heater Cost per Day…..$6.69Electric Resistance Cost per Day…………$23.43

Natural Gas Cost per Day…………………$11.10

Heat Pump Water Heater Cost per Year…$2,442

Electric Resistance Cost per Year………..$8,552Natural Gas Cost per Year………………...$4,051

W t H ti C t S


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Water Heating Cost Summary

Electric Resistance Cost per Year………..$8,552Heat Pump Water Heater Cost Per Year...$2,442

Yearly Savings $6,110

Natural Gas Cost per Year………………...$4,051

Heat Pump Water Heater Cost Per Year...$2,442

Yearly Savings $1,609

B t Th ’ M !!


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But There’s More!!

The Water Heating Story Ends Here for ElectricResistance and Natural Gas Water Heating

Water Heating is the End

Heat Pump Water Heaters also Provide SpaceCooling



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But There s More!!

Approximately 2 tons of cooling from the HPWH

will offset about 2 tons of building air conditioning

Cooling is Useful in Commercial Kitchens


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Cooling is Useful in Commercial Kitchens

For every ton of room air conditioning offset by the

HPWH, approximately 1.3 kW/hr is saved.

Cooling: Less Quantifiable Impact


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Cooling: Less Quantifiable Impact

Productivity: cooling on the cook line

reduces heat fatigue

HPWH in Commercial Kitchens


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HPWH in Commercial Kitchens

Anyone Hungry??

Presenter


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Presenter

Greg Wilson

– National Sales Manager, Heat PumpTechnology

[email protected]

678-990-4150 direct line

770-453-9323 fax
mailto:[email protected]:[email protected]

6d greg wilson

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