NG and Propane powered heat pumps - AEE ... - AEE New...
Transcript of NG and Propane powered heat pumps - AEE ... - AEE New...
Richard J. Costello, PE Acela Energy Group, Inc
1
Natural Gas / Propane Powered Heat Pump Program Chilled Water and / or Hot Water
ACELA THERMAL ENERGY
1/9/2014 2
Natural Gas-Engine Driven Heat Pump Water Heaters
HEWH-500-AS
HEWH-500-WS
Association of Energy Engineers New England Chapter
10/9/14 3
Ilios High Efficiency Water Heater: More than twice the efficiency of a conventional boiler
10/9/14 4
Why is a boiler like an iceberg?
10/9/14 5
Water Heating Costs
First Costs
Fuel Costs
$
$ $
$
$
$ $
10/9/14 6
Ilios Product Line
§ HEWH-500-AS “Air-Source” § 300-600 MBH Heat Output § Efficiencies 1.2-2.2 (120-220%) § 4’ X 7’ X 6’ Box § Typically Installed Outdoors
§ HEWH-500-WS “Water-Source”
§ 300-600 MBH Heat Output § Efficiencies 2.0-3.0+ (200-300%) § 3’ X 5’ X 6’ Box § Typically Installed Indoors
10/9/14 7
HEWH-500-AS Product Concept
Heat Out A
A2
B
C
E
A1
Air-‐Cooled Evaporator
Condenser
Compressor
Natural Gas
Heat From Outdoor Air
Refrigeration Cycle
Engine Waste
Heat
D5 kW
Generator for
Parasitics
78 °F Ambient 120 °F Hot Water
This energy is free and renewable!
You only pay for gas input energy…
10/9/14 8
Product Specification- HEWH-500-AS § 300,000-600,000 Btu/hr Heat Output § Engine (<50 HP)
§ 2.5 L FORD 4-Cylinder § Natural Gas or Propane Fuel § Ultra Low Emissions
§ Small 5 kW generator for electrical parasitic load § Electrical Requirement 115/60/15A similar to household appliance
§ Control power & battery charging § Cogenerates parasitic load for pump and fans § NO COSTLY 3-PHASE POWER SERVICE NEEDED
§ Next-generation control system Internet-Based Touch-screen display Advanced communications (CAN)
§ Efficient, low-pressure, HFC-134a refrigerant
10/9/14 9
Coefficient of Performance
10/9/14 10
Heat Output
10/9/14 11
How Do We Stack Up?
Conditions: Producing 120°F Hot Water @ 78°F Ambient
Ilios HEWH-500AS COP = 2.0 (Source Efficiency)
= 5.5 (Site Efficiency)
Commercial Electric Heat Pump Water Heater COP = 1.2 (Source Efficiency)
= 4.0 (Site Efficiency)
Boiler COP = 0.85 (85%) (Source Efficiency)
A BTU of Electricity is approximately 3X the cost of a BTU of Gas!
10/9/14 12
Source Efficiency Comparison
η=33%
Power Plant
100 Units of Energy
Overall Efficiency
200 Units of Heat
200%
6% Loss
200 Units of Heat
200 Units of Heat
166 Units of Energy 120%
235 Units of Energy 85% Gas Boiler
Electric Heat Pump Water Heater
Natural Gas Heat Pump Water Heater
Conditions: Producing 120°F Hot Water @ 78°F Ambient
55 50
10/9/14 13
Operating Cost Comparison
Example: Hotel/Condo/Hospital in New York City Average thermal load per month = 4000 therms 400 MMbtu or 117,200 kWh monthly
or 4800 MMBtu or 1,406,400 kWh annually
Virginia Assumptions: Natural Gas = $0.90/therm Electricity = $0.12/kWh (Blended Rate)
10/9/14 14
Operating Cost Comparison COP = 2.0
4800 MMBtu
4800 MMBtu
COP = 4.0 (Site Efficiency)
4800 MMBtu
COP = 0.85
$27,600* (2400 MMBtu)
$42,192 (351,600 kWh)
$50,823 (5647 MMBtu)
*Includes full annual maintenance contract
10/9/14 15
Fuel In (Natural Gas or Propane)
252,527 Btu/hr
Chilled Water Hot Water
24 Tons (287,638 Btu/hr)
Coefficient of Performance (COP) = 252,527 Btu/hr
287,638 + 476,289 Btu/hr = Fuel In
Total Energy Out = 3.0
Conditions: Hot Water Out =120°F Source Water = 47/54°F
476,289 Btu/hr
Example of Ilios HEWH-500-WS producing hot and chilled water simultaneously.
HEWH-500-WS Product Concept
10/9/14 16
1. Chilled Water Loop q Free chilled water (15-25 tons) while producing hot water q Chilled water value dependent on:
q Existing electric chiller efficiency q Electric Rate q Demand Charges
q Any large building with a chiller and boiler loop 2. Condenser Water Loop
q 80-95°F Source Temp = Very High Heating Efficiencies q Only works with water-cooled chilling plants
3. Low-Grade Waste Heat q Manufacturing & Food/Beverage Production Plants
4. Groundwater/Geothermal q Not a common application but is possible
Available Sources
Efficiencies (COP) from: q 1.5-2.5 Heating q Up to 3.1 w/ cooling effect
10/9/14 17
Product Specification- HEWH-500-WS
§ 300,000-600,000 Btu/hr Heat Output § Engine (<50 HP)
§ 2.5 L FORD 4-Cylinder § Natural Gas or Propane Fuel § Ultra Low Emissions
§ Next-generation control system Internet-Based Touch-screen display Advanced communications (CAN)
§ Efficient, low-pressure, HFC-134a refrigerant
10/9/14 18
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
Dollars ($)
Electric Water-‐SourceHeat Pump
Annual Operating Cost Comparison (NYC)
Boiler & Electric Chiller
IliosGas-‐Engine DrivenWater-‐SourceHeat Pump
Assumptions:1. 4000 operating hours/year2. 22 tons of chilling (47°F/54°F)3. 527,500 Btu/hr of hot water (120°F)4. Electric Rate $0.12/kWh, $20/kW Demand Charge5. $1.00/Therm Natural Gas6. Electric Heat Pump COP = 6.0, Boiler Efficiency = 75%,
Electric Chiller Efficiency (0.6 kW/ton)
Maintenance Cost
10/9/14 19
Utility Incentives
§ The Ilios machine falls either under existing incentive programs with several utilities or under custom programs
§ Many utilities will pay $1.00-$2.50/therm saved in the first year. This could be anywhere from $15,000-$50,000 depending on the installation.
§ Incentives currently available through, National Grid, NStar, SoCalGas, and others.
§ Helps Utilities meet their therm savings goals § Typical installations save 15,000-30,000 therms/year
10/9/14 20
Federal Incentives
§ Ilios heat pump qualifies for the 10% Investment Tax Credit as it is considered mechanical CHP. This is available until December 21, 2016.
§ Per section 48(a)(3)(A)(v) of the IRC the CHP Tax Credit is defined as:
“A property compromising of a system which uses the same energy source for simultaneous or sequential generation of electrical power, mechanical shaft power, or both, in combination with the generation of steam or other forms of useful thermal energy (including heating and cooling applications”
10/9/14 21
§ 500,000 Btu/hr Output (nominal) § Hot Water delivery temperature 100°F-165°F § Highly Efficient Heat Pump cuts heating costs and
carbon footprint in half § Ultra Low emissions with near zero criteria
pollutants § Simple installation to existing hot water system § Minimal Electrical Requirements-120V/60Hz/10A § Modular & Scalable
Product Features and Benefits
10/9/14 22
Safety Certifications § ETL Approved to the following standards:
§ UL 1995-Safety Standard for Heating and Cooling Equipment
§ ANSI Z21.40.2- Gas-Fired, Work Activated Air-Conditioning and Heat Pump Appliances (Internal Combustion)
§ CE Marked for Europe § Indoor and Outdoor Installation Approved
10/9/14 23
What about the service?? § Annual preventive maintenance-just like a boiler
§ Up to 8,000 hour oil change intervals! § Tecogen Full Factory Service available at a rate of
$1.00/run hour § All economic analysis presented includes service fee § Tecogen currently has over 1500 machines in the
field running under factory service contracts § Everything is covered “bumper-to-bumper”
§ Essentially an unlimited parts & labor warranty § The first Tecogen cogeneration module has been
running for over 31 years-serviced by Tecogen!
10/9/14 24
Screen shot of unit running at full load producing 130°F hot water at 90°F ambient in Boston on 7/19/13 in our factory test cell. As you can see the unit is putting out 650,000 Btu/hr of heat with a gas input of only 289,577 Btu/hr. This provides a COP = 650,000/289,577 = 2.25
This is 3X the efficiency of typical gas boiler!!
HEWH-500-AS
10/9/14 25
HEWH-500-WS
Screen shot of unit running at full load producing 122°F hot water using a 55°F chilled water return as the source temperature. As you can see the unit is putting out 476,289 Btu/hr of heat with a gas input of only 252,527 Btu/hr. This provides a COP = (476,289+287,638)/252,527 = 3.0
This is 4X the efficiency of typical gas boiler!!
1/9/2014 26
Applications q Domestic Hot Water q Pool heating q Laundry/Food Prep q Process Heating
q Food/Beverage q Manufacturing
q Desiccant Regeneration q Summer Reheat (Humidity Control) q Space Cooling (chilled water) q Process Cooling (chilled water)
q Hotels q Condos q Correctional Facilities q Nursing Homes q Hospitals q Spa/Health Clubs q Universities q Manufacturing Facilities
Building Types
10/9/14 27
Sample Installations
10/9/14 28
Questions?
Richard J. Costello, PE, MSEM, BSME, CEM President – Acela Energy Group, Inc. [email protected]
508 530 3040 www.acelaenergy.com
ACELA THERMAL ENERGY