1、 AHRI STANDARD 871 (SI)-2015 2016 Standard for Performance Rating of Direct Geoexchange Heat Pumps AHRI Standard 871 (SI) - 2016 Price $10.00 (M) $20.00 (NM) Copyright 2016, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Offi
2、ce IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, tested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, const
3、ructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices
4、. AHRI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This standard supersedes ANSI/AHRI Standard 870-2005 with Addendum 1. For I-P ratings, see AHRI Standard 870 (I-P) -2016. TABLE OF CONTENTS SECTION PAGE Section
5、 1. Purpose 1 Section 2. Scope . 1 Section 3. Definitions . 1 Section 4. Classification . 3 Section 5. Test Requirements . 4 Section 6 Rating Requirements . 4 Section 7. Minimum Data Requirements for Published Ratings 5 Section 8. Operating Requirements 6 Section 9. Marking and Nameplate Data . 6 Se
6、ction 10. Conformance Conditions. 6 TABLES Table 1. Classification of Direct Geoexchange Heat Pumps . 3 Table 2. Capacity Rating Multiples . 4 Table 3. Standard Rating Conditions 5 APPENDICES Appendix A. References Normative 7 Appendix B. References Informative 7 AHRI STANDARD 871 (SI)-2016 1 PERFOR
7、MANCE RATING OF DIRECT GEOEXCHANGE HEAT PUMPS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Direct Geoexchange Heat Pumps: definitions; classification; test and rating requirements; minimum data requirements for Published Ratings; operating requirements; marking an
8、d nameplate data; and conformance conditions. For the remainder of this standard, the terms “heat pump” or “equipment” are also used to designate Direct Geoexchange Heat Pumps. 1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, c
9、ontractors and users. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to factory made residential, commercial and industrial Direct Geoexchange Heat Pumps as defined in Section 3, and within the ca
10、pacity range of 5,270 W through 52,700 W. 2.1.1 Energy Source. This standard applies only to electrically-driven, mechanical vapor-compression refrigeration systems. 2.1.2 Alternative Applications. Equipment designed for rating under this standard is not suitable for alternative applications covered
11、 in ANSI/AHRI/ASHRAE ISO Standards 13256-1 and 13256-2. 2.1.3 Exclusions. This standard applies to the rating and testing of complete refrigeration systems and does not apply to individual system components for separate use. Section 3. Definitions All terms in this document will follow the standard
12、industry definitions in the ASHRAE Terminology website (https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology) unless otherwise defined in this section. 3.1 Cooling Coefficient of Performance (COPC). The ratio of Cooling Capacity in watts to the power input values in watts a
13、t any given set of Rating Conditions expressed in watts/watt. 3.2 Cooling Capacity. The capacity associated with the change in air enthalpy which includes both the latent and sensible capacities, expressed in watts. 3.3 Direct Geoexchange Heat Exchanger. A continuous sealed tube(s) heat exchanger wi
14、th refrigerant supply and refrigerant return. This may be comprised of several tubes and may be supplied with each heat pump. The heat exchanger(s) may be factory or field assembled. 3.4 Direct Geoexchange Heat Pump(s) (DGX). A heat pump consisting of (1) one or more factory made assemblies which no
15、rmally include an indoor conditioning coil with air or water moving means, (2) compressor(s), and (3) a subsurface refrigerant piping loop system functioning as a Direct Geoexchange Heat Exchanger, and may include means to provide a heating function, or a cooling function, or both. The separate syst
16、em components shall be designed for use together. Models designated as “cooling only” need not include the heating function and models designated “heating only” need not include the cooling function. The four types of Direct Geoexchange Heat Pumps within the scope of this standard are as follows. AH
17、RI STANDARD 871 (SI)-2016 2 3.4.1 DGX-to-Air Split System (Type 1). Compressor and indoor coil are in separate cabinets. Indoor coil is with or without a fan. 3.4.2 DGX-to-Air Packaged System (Type 2). Compressor and indoor coil are in one cabinet, with or without a fan. 3.4.3 DGX-to-Water Split Sys
18、tem (Type 3). Compressor and Indoor Water-to-refrigerant heat exchanger are in separate cabinets. Indoor Water-to-refrigerant heat exchanger is with or without a pump. 3.4.4 DGX-to-Water Packaged System (Type 4). Compressor and Indoor Water-to-refrigerant heat exchanger are in one cabinet. Indoor he
19、at exchanger is with or without a pump. Note: ANSI/ASHRAE Standard 194 uses the term Direct-expansion Ground Source Heat Pump in lieu of Direct Geoexchange Heat Pump. 3.5 Effective Power Input. The average electrical power input in watts, supplied to the equipment within a defined interval of time.
20、This is the sum of the following, as appropriate: 3.5.1 The power input for the operation of the compressor, excluding supplemental electric heat, W 3.5.2 The power input of all control and safety devices of the equipment, W 3.5.3 The proportional power input of the conveying devices for the transpo
21、rt of heat transfer media through the heat pump only (e.g., fans, pumps, whether internal or external, whether provided with heat pump or not), W 3.6 Heating Capacity. For DGX-to-Air systems, the rate at which the equipment adds heat to the air passing through the indoor coil under specified conditi
22、ons of operation, including the fan power adjustment. For DGX-to-Water systems, the rate at which the equipment adds heat to the Indoor Water passing through the indoor heat exchanger under specified conditions of operation, including the pump power in watts, W. 3.7 Heating Coefficient of Performanc
23、e (COPh). The ratio of the Heating Capacity in watts to the Effective Power Input in watts at any given set of Rating Conditions expressed in watts/watt, W/W. Supplementary resistance heat shall be excluded. 3.8 Indoor Water. The liquid used in the indoor side water-to-refrigerant heat exchanger. Th
24、is is not the same working fluid as the Test Liquid. 3.9 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a heat pump may be chosen to fit its application. These values apply to all units of like nominal size and type
25、 (identification) produced by the same manufacturer. The term Published Rating includes the rating of all performance characteristics shown on the heat pump or published in its specifications, advertising or other literature controlled by the manufacturer, at stated Rating Conditions. 3.9.1 Applicat
26、ion Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Conditions). 3.9.2 Part-load Rating. A rating based on tests performed at part-load Rating Conditions. 3.9.3 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.
27、10 Rating Conditions. Any set of operating conditions under which a single level of performance results and which causes only that level of performance to occur. 3.10.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics as listed in Table 3.
28、 3.11 “Shall” or “Should”. “Shall” or “Should” shall be interpreted as follows: AHRI STANDARD 871 (SI)-2016 3 3.11.1 Shall. Where “Shall” or “Shall not” is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.11.2 Should. “Should” is used to indic
29、ate provisions which are not mandatory but which are desirable as good practice. 3.12 Test Liquid. An antifreeze mixture used in the refrigerant-to-test liquid heat exchanger (ground loop simulator) consisting of water and 15% methanol, by mass. Section 4. Classification 4.1 Classification. Direct G
30、eoexchange Heat Pumps (DGX) within the scope of this standard shall be classified as shown in Table 1. Table 1. Classification of Direct Geoexchange Heat Pumps Designation AHRI Type3 Arrangement1 Heating & Cooling Heating Only Cooling Only DGX-to-Air Split System (Type 1) with Indoor Fan HRCU-DGX-CB
31、 HORCU-DGX-CB HCRCU-DGX-CB FAN HEAT2 COMP INDOOR COIL GROUND LOOP DGX-to-Air Split System (Type 1) without Indoor Fan HRCU-DGX-C HORCU-DGX-C HCRCU-DGX-C HEAT2 COMP INDOOR COIL GROUND LOOP DGX-to-Air Packaged System (Type 2) with Indoor Fan HSP-DGX-CB HOSP-DGX-CB HCSP-DGX-CB FAN HEAT2 COMP INDOOR COI
32、L GROUND LOOP DGX-to-Air Packaged System (Type 2) without Indoor Fan HSP-DGX-C HOSP-DGX-C HCSP-DGX-C HEAT2 COMP INDOOR COIL GROUND LOOP DGX-to-Water Split System (Type 3) with Circulating Pump HRCU-DGX-CWP HORCU-DGX-CWP HCRCU-DGX-CWP CIRC PUMP HEAT2 COMP INDOOR HX GROUND LOOP DGX-to-Water Split Syst
33、em (Type 3) without Circulating Pump HRCU-DGX-CW HORCU-DGX-CW HCRCU-DGX-CW HEAT2 COMP INDOOR HX GROUND LOOP DGX-to-Water Packaged System (Type 4) with Circulating Pump HSP-DGX-CWP HOSP-DGX-CWP HCSP-DGX-CWP CIRC PUMP HEAT2 COMP INDOOR HX GROUND LOOP DGX-to-Water Packaged System (Type 4) without Circu
34、lating Pump HSP-DGX-CW HOSP-DGX-CW HCSP-DGX-CW HEAT2 COMP INDOOR HX GROUND LOOP Notes: 1) Arrangement denotes Heating & Cooling and Heating Only mode functions. Separated enclosures indicate a remote condensing unit (RCU) and adjoining enclosures indicate a single package (SP). 2) “HEAT” denotes sup
35、plemental heating options such as electric resistance heat. 3) For AHRI Types XXXX-YYY-ZZZ, XXXX is Segment 1, YYY is Segment 2, and ZZZ is Segment 3. Legend First Segment: H = Heat Pump (Heating and Cooling, unless followed by an “O” or “C”) O = Heating Only C = Cooling Only R = Remote CU = Condens
36、ing Unit SP = Single Package Second Segment: DGX = Direct Geoexchange System Third Segment: C = Outdoor Coil (Ground Loop) B = Indoor Fan W = Indoor Water Heat Exchanger P = Indoor Circulating Pump AHRI STANDARD 871 (SI)-2016 4 Section 5. Test Requirements 5.1 Test Methods. All tests shall be conduc
37、ted in accordance with ANSI/ASHRAE Standard 194. Section 6 Rating Requirements 6.1 Standard Rating. Standard Ratings shall be established at the Standard Rating Conditions specified in Section 6.1.3, using test procedures described in ANSI/ASHRAE Standard 194. Standard Ratings relating to Cooling an
38、d Heating Capacities shall be net values, including the effects of circulating fan and circulating pump heat, but not including supplementary heat. Standard efficiency ratings shall be based on Effective Power Input as defined in Section 3.6. 6.1.1 Values of Standard Capacity Ratings. Capacity ratin
39、gs shall be expressed only in terms of watts in multiples shown in Table 2. Table 2. Capacity Rating Multiples Capacity Ratings, W Multiples, W 5,270 25 and 11,000 50 11,000 and 9 150 19,000 and 39,600 300 39,600 and 52,700 600 6.1.2 Values of Standard Coefficients of Performance. Standard Coefficie
40、nts of Performance for heating and cooling, whenever published, shall be expressed in multiples of the nearest 0.1 watt/watt. 6.1.3 Standard Rating Conditions. Equipment with dual rated frequencies shall be tested at each frequency. The test conditions for Standard Ratings shall include the followin
41、g. 6.1.3.1 Standard Rating Conditions. Standard Rating Conditions for all types are described in Table 3. For each test, the heat pump shall be operated and readings taken in accordance with ANSI/ASHRAE Standard 194. 6.1.3.2 Electrical Conditions. Standard rating tests shall be performaned at the na
42、meplate rated voltage and frequency. AHRI STANDARD 871 (SI)-2016 5 Table 3. Standard Rating Conditions Equipment Classification Rating Conditions Operating Mode Entering Air Temperature dry bulb/wet bulb, C Entering Water Temperature, C Surrounding Air Temperature, C Saturated Refrigerant Temperatur
43、e1, (Evaporating) (Condensing) C DGX-to-Air (Types 1 & 2) Standard Heat 20.0/15.0 N/A 20.0 0.0 (Evap) Cool 27.0/19.0 N/A 27.0 25.0 (Cond) Part-load Heat 20.0/15.0 N/A 20.0 5.0 (Evap) Cool 27.0/19.0 N/A 27.0 20.0 (Cond) DGX-to-Water (Types 3 & 4) Standard Heat N/A 40 15.0-30.0 0.0 (Evap) Cool N/A 12
44、15.0-30.0 25.0 (Cond) Part-load Heat N/A 40 15.0-30.0 5.0 (Evap) Cool N/A 12 15.0-30.0 20.0 (Cond) Note: 1. Refrigerant pressure and temperature are measured at the inlet to the heat pump being tested. Increasing superheat will increase the equipment entering refrigerant temperature and increasing s
45、ub-cooling will decrease the equipment leaving refrigerant temperature. 6.2 Part-load Rating. Heat pumps which are capable of capacity control shall be rated at each step of capacity reduction provided by the heat pump and allowed by the controls. 6.2.1 Part-load Rating Conditions. The conditions of
46、 test for Part-load Ratings are the same as for the Standard Ratings in Section 5.3 except for the values listed in Table 3. 6.2.1.1 Capacity Reduction Means May be Adjusted to Obtain the Specified Step of Unloading. No manual adjustment of indoor air quantities or water flow rates from those of Sta
47、ndard Rating Conditions shall be made. Automatic adjustment of the quantities by system function is permissible provided it is by means of a control system which is an integral part of the equipment to be tested and the control is configured to function in accordance with the manufacturers published
48、 instructions. The manufacturer must provide a schematic and sequence of operation for providing control of the system during test. Section 7. Minimum Data Requirements for Published Ratings 7.1 Minimum Data Requirements for Published Ratings. As a minimum, Published Ratings shall include Standard R
49、atings and, as applicable, Part-load Ratings. All claims to ratings within the scope of this standard shall include the statement “Rated in accordance with AHRI Standard 871 (SI)”. All claims to ratings outside the scope of this standard shall include the statement “Outside the scope of AHRI Standard 871 (SI)”. Wherever Application Ratings are published or printed, they shall include a statement of the conditions at which the ratings apply. Calculations for the Published Ratings shall be in accordanc
