ASHRAE Standard 206-2013 Method of Testing for Rating of Multi-Purpose Heat Pumps for Residential Space Conditioning and Water Heating Wayne Reedy Oak.

ASHRAE Standard 206-2013

Method of Testing for Rating of Multi-Purpose Heat Pumps for Residential Space Conditioning and Water Heating

Wayne Reedy Oak Ridge National Laboratory

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BACKGROUND

• Development of standard was supported by ORNL as part of the U.S. Department of Energy’s effort to facilitate market penetration of multifunction heat pumps.

• In order to achieve an instantly recognizable, authoritative document, a test standard was requested of ASHRAE, which in turn established a Standard Project Committee to develop Standard 206

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• Committee was made up of 15 voting members, representing manufactures, testing laboratories, electric utilities, and a university; AHRI was a non-voting member.

SPC 206 INCLUDED REPRESENTATION FROM ALL

INDUSTRY SEGMENTS

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Standard 206 applies to electrically powered unitary heat pump equipment that provides both space conditioning and water heating functions, and may include other functions, such as dehumidification and/or ventilation.

SCOPE

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• Standard 206 addresses air-source, water-source, ground water-source, ground-source closed loop, and direct geoexchange equipment.

• It applies to air-source equipment rated below 19,000 W (65,000 Btu/h), and water-source, ground water-source, ground-source closed loop, and direct geoexchange equipment rated below 40,000 W (135,000 Btu/h).

SCOPE

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• Standard 206 addresses single-capacity, dual-capacity, and variable-capacity equipment

• Provides for up to 7 modes of equipment operationo Space conditioning onlyo Dedicated water heatingo Dehumidification+space conditioningo Dehumidificationo Space conditioning+water heatingo Dehumidification+space conditioning+water

heatingo Dehumidification+water heating

SCOPE

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• Space conditioning may be heating or cooling

• Dehumidification may be during summer or winter

• Dedicated water heating may be during summer or winter, with the heat source being either indoor or outdoor

SCOPE

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• Test procedure covers packaged, split, mini-split, and triple split equipment configurations

• Refrigerant-to-water HX may be internal or external to a heat pump section or water storage tank

• Specifies refrigerant and water line lengths/configuration for all options

SCOPE

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• ANSI/ASHRAE Standard 37Methods of Testing for Rating Electrically Driven Unitary Air-

Conditioning and Heat Pump Equipment (Steady-State Performance)

• ANSI/ASHRAE Standard 116Methods of Testing for Rating Seasonal Efficiency of Unitary Air Conditioners and Heat Pumps

STANDARD 206 IS AN EXTENSION OF AND CONSISTENT WITH:

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• AHRI Standard 210/240 Standard for Unitary Air-Conditioning and Air-Source Heat Pump

Equipment

• ANSI/AHRI/ASHRAE ISO Standard 13256-1Water-source heat pumps - testing and rating for performance - Part 1: Water-to-air and brine-to-air heat pumps

• AHRI Standard 870Standard for Performance Rating of Direct GeoExchange Heat Pumps

• ANSI/ASHRAE Standard 118.2Method of Testing for Rating Residential Water Heaters

STANDARD 206 IS ALSO CONSISTENT WITH:

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ANSI/ASHRAE Standard 137Methods of Testing for Efficiency of Space-Conditioning/Water-

Heating Appliances that Include a Desuperheater Water Heater

and

various waivers from DOE’s Central Air Conditioner and Central Air Conditioning Heat Pump Test Procedure

STANDARD 206 SHOULD REPLACE:

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• Water heating load

• Space latent load

• Space sensible load

CALCULATION PROCEDURE IS A BIN PROCESS BASED ON:

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• Three performance descriptors are used to completely describe the performance of the combined appliance:

o Combined appliance space conditioning performance for the cooling season;

o Combined appliance space conditioning performance for the heating season;

o Combined appliance water heating performance on an annual basis.

• In all cases, the descriptor ends in a subscript “ca” to designate “combined appliance”.

PERFORMANCE DESCRIPTORS

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• Air-source equipmento SEERca

o HSPFca

o EFwca

• Water-source equipmento EERca

o COPca

o EFwca

PERFORMANCE DESCRIPTORS

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• Approved as an ASHRAE standard 6/26/2013

• Available from ASHRAE in paper or electronic form

• Includes an excel spreadsheet to perform calculations

STATUS:

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QUESTIONS

COMMENTS