ARI 325-1998 Ground Water-Source Heat Pumps《地下水资源蒸汽泵》.pdf

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1、 STD-AR1 325-ENGL 3798 0352320 UOLLL7b 452 1998 STANDARD for AIR-CONDITIONING requirements for testing and rating performance requirements; marking and nameplate data; and conformance conditions. 1.1.1 This standard is intended for the guidance of the industry, including manufacturers, engineers, in

2、stallers, contractors 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 ground water-source heat pumps, as defined in Section 3. 2.1.

3、1 Energy Source. This standard applies only to electrically-driven, mechanical compression type systems. 2.1.2 Alternative Applications. Equipment designed for rating under this standard may not be suitable for alternative applications covered in related ARI Standards 320 and 330. 2.2 Exclusions. Th

4、is standard does not apply to individual assemblies for separate use. Section 3. Definitions 3.1 Definitions. Ali terms in this document will follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air- conditioning and Repigeration unless other

5、wise defined this section. 3.2 Coefficient of Performance (COP). A ratio of the heating capacity in watts w, excluding supplementary resistance heat, to the power input in watts Wl at any given set of rating conditions expressed in wattslwatt Wnv. (The international community uses the term EER as eq

6、uivalent to cooling COP.) 3.2.1 Standard Coefficient of Performance. A ratio of the capacity to power input obtained at Standard Rating Heating Conditions. 3.3 Enew EBcienCy Ratio (EER). A ratio of the cooling capacity in Bairn to the power input in watts w at any given set of rating conditions, exp

7、ressed in Btu/W*h WN. 3.3.1 Standard Energy Efficiency Ratio. A ratio of the capacity to power input values obtained at Standard Rating Conditions. 3.4 Ground Water-Source Heat Pump. A ground water- source heat pump typically uses water pumped from a well, lake or stream as a heat sourceheat sink. T

8、he temperature of the water is related to climatic conditions and usually rangeshm45“Fto 75F 7.2“C to 23.9“CI for deep wells. Rated efficiencies include an allowance for power to pump the water. A pund water-source heat pump consists of one or more faory-made assemblies which normally include an ind

9、oor conditioning coil with air moving means, compressor(s) and refrigerant-to-water heat exchanger(s), including means to provide a heating function and may include a cooling function. When such equipment is provided in more than one assembly, the separated assemblies shall be designed to be used to

10、gether, and the requirements of rating outlined in the standard are based upon the use of matched assemblies. 3.4.1 Functions. Ground water-source heat pumps shall provide the function of heating with controlled temperature, and may include the functions of water heating, air-cooling, air-circulatin

11、g, air-cleaning, dehumiwng or humiwng. 3.5 Published Rating. A statement of the assigned values of those performance characteristics, under stated rating conditions, by which a unit may be chosen to fit its application. These values apply to all units of like nominal size and type (identification) p

12、roduced by the same manufacturer. As used herein, the term “published rating“ includes the raing of all performance characteristics shown on the heat pump or published in specifications, advertising or other literature controlled by the manufacturer, at stated rating conditions. 3.5.1 Standard Ratin

13、g. A rating based on tests performed at Standard Rating Conditions. 3.5.2 Application Rating. A rating based on tests performed at application rating conditions (other than Standard Rating Conditions). 1 COPYRIGHT Air-Conditioning and Refrigeration InstituteLicensed by Information Handling ServicesA

14、R1 STANDARD 325-1 998 3.6 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. 3.6.1 Standard Rating Condtiork. Rating conditions used as the basis of comparison of performance characteristics.

15、 3.7 “Shall,“ “should, Recommended“ or 7t Is Recommended “Shall,“ should, “recommended“ or “it is recommended“ shall be interpreted as follows: 3.7.1 Shall. Where “shail“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.7.2 S

16、hould, Recommended or It Is Recommended. “Should,“ “recommended“ or “it is recommended“ is used to indicate provisions which are not mandatory but which are desirable as good practice. Section 4. Classification 4.1 Classijkation. Normaily, ground water-source heat pumps wihin the scope of this stand

17、ard may be classified as shown in Table 1. Section 5. Testing and Rating Requirements 5.1 Standard Rating. Siandard ratings shall be established at the Standard Rating Conditions specified in 5.1.4. All standardratings shall be verifed by tests conducted in accordance with ASHRAE Standard 37, and wi

18、th the test methods and procedures as describe in this standard exceptthat the total cooling and heating capacity shall be the average of the Air-Enthalpy Method and the Water Coil Method. Standard Ratings relating to cooling or heating capacities shall be net values, including the effects of circul

19、ating-fan heat, but not including supplemenmy heat. Power input shall be the total power input to the compressor(s), fm(s), pump penalty (see 5.1.3), plus controls and other items included as part of the model number). Standard Ratings of units which do not have indoor air- circulating fans fimished

20、 as part of the model, i.e., split system with indoor coil alone (see Table i), shall be established by subtracting from the total cooling capacity 1250 Btu/h per 1000 scfm 0.775 watts per m3/s, and by adding the same amount to the heating capacity. Total power input for both heating and cooling sha

21、ll be increased by 365 wattdl000 scfm 0.775 watts per m3k of indoor air handled. 5.1.1 Values of Standard Capacity Ratings. These raings shali be expressed only in terms of Btu/h WJ in multiples of 100 Btu/h 10 w. 5.1.2 Values of Pressure Drop Ratings. Water flow rate) and pressure drop(s) shall be

22、determined at each Standard Rating Condition specified in 5.1.4. Water pressure drop through the unit for the rated standard flow rate(s) shall be expressed in multiples of 0.5 psi 3.5 Wal. Single Package + A sutKx of “O“ following any of the above classifications indicates equipment not intended fo

23、r use with * Denotes cooling mode function. field-instailed duct systems (see 5.1.4.5). 2 COPYRIGHT Air-Conditioning and Refrigeration InstituteLicensed by Information Handling ServicesSTD-AR1 325-ENGL 1998 33521217 0011LL6L ALT H AR1 STANDARD 325-1998 Water flow rate) shall be expressed in gpm PSI

24、in multiples of 0.1 gpm to 10 gpm and 0.5 gpm for over 10 gpm Standard coefficients of performance for hating, whenever published, shali be expressed in multiples of the nearest O. 1. in caiculating EERs or COPS, a penaity for the water pump effect sha be added to the measured power input and determ

25、ined as follows: PP = WF (PP, x AP) + 651 where PP = total pumping penalty, watts Wl WF = water flow rate, gpm Ks PP, = basic pumping penaity (Table 2), wattdgpm per hp in psi W/(L/s) per AP in Wal AP = unit water pressure drop, psi Wal 65 lo301 = constant, wattdgpm W per L/s based on 50 ft 15.24 m

26、externai head Example: At rated flow of 10 gprn 0.63 1 Us, from Table 2 PP, = 2.69 wattdgpm per AP in psi w/(ws) per AP in Ha With water coil pressure drop = 10 psi 68.9 kPa PP = 10 (2.69 x 10) + 651 = 919 watts 919 watts 5.1.4 test for Standard Ratings shall include the following: Standard Rating C

27、onditions. The conditions of 5.1.4.1 Standard Rating Temperatures. a. Cooling. (High Temperature) (Not required for heating-only units) Air temperature entering indoor portion ofunit 80F 26.7“C dry bulb 67F 19.4“CI wet bulb AI; temperature surrounding unit 0F 26.7“C dry bulb Water temperature enteri

28、ng refligerant-to-water heat exchanger . 70F 21.1C manufacturer Water flow rate ,.As specified by b. Cooling. (Low Temperature) (Not required for heating-only units) Air temperature entering indoor portion of unit . 80F 26.7“C dry bulb 67F 1.9.4“C wet bulb Air temperature surrounding unitSO“F 26.7“C

29、 dry bulb Water temperature entering reiigerant-to-water heat exchanger 50 “F 1 O O C Water flow rate . As specified by manufacturer c. Heating. (High Temperature) Air temperahire entering indoor portion of unit . 70F 21.l0C dry bulb 60F 15.6“C wet bulb, max. Air temperam surrounding unit 70F 21.l0C

30、 dry bulb Water temperature entering refrigerant-to-water heat exchanger . 70F 21.1“C manufacturer Water flow rate As specified by d. Heating. (Low Temperature) Air temperahire entering indoor portion of unit 70F 21.l0C dry bulb 60F 15.6“C wet bulb, max. Air temperature surrounding unit . 70F 21.l0C

31、 dry bulb Water temperature entering reiigerant-to-water heat exchanger 50F lOC Water flow rate . As specified by mandacturer No manual adjustment of water flow quantities between heating and cooling standard rating conditions shall be made. Automatic adjustment of the quantities by system function,

32、 however, is permissible. For water flow, a separate control signai output for each step of pump capacity will be considered automatic adjustment. 3 4 COPYRIGHT Air-Conditioning and Refrigeration InstituteLicensed by Information Handling ServicesAR1 STANDARD 325-1998 gpm IJ-JSI 1 - 4.0 4.1 - 7.9 8.0

33、 - 11.9 12.0 - 15.9 16.0 - 19.9 0.063 - 0.252 0.258 - 0.498 0.504 - 0.750 0.757 - 1.002 1.010 - 1.254 1.262 and above Uater Flow Rate per AP 11.50 3.88 8.92 2.32 5.34 5.1.4.2 Electrical Conditions. Standard RaLg tests shall be performed at the nameplate rated voltage(s) and frequency. For heat pumps

34、 with dual nameplate voltage . ratings, Standard Rating tests shall be performed at both volages, or at the lower of the two voltages, if oniy a single Standard Rating is to be published. 5.1.4.3 Indoor-Side Air Quanti the amount of allowance to be minus 5 percent. Section 6. Performance Requirement

35、s 6.1 Performance Requirements. To comply with this standard, ground water-some heat pumps shall be designed and produced in accordance with the provisions of this section in such a mer that any production unit will meet the requirements detailed herein. 6.2 Maximum Operating Conditions Test. Ground

36、 water- source heat pumps shall be designed and produced to pass the following maximum operating conditions test with an indoor-side coil air quantity as determined under 5.1.4.3: 6.2.1 Temperature Conditions. 6.2.1.1 Cooling. (Not required for heating-oniy units) Air temperature surrounding Air tem

37、perature entering unit 95F 35.0C dry bulb indoor portion of unit 95F 35.0C dry bulb 71F 21.7“C wet bulb Water temperature entering refigerant-to- water heat exchanger . .7 5 OF 23 .9 O C Water flow rate . maintained at 75 percent of flow rate specied in high temperature cooling test of 5.1.4. la 5 C

38、OPYRIGHT Air-Conditioning and Refrigeration InstituteLicensed by Information Handling Services6.2.1.2 Heating. Air temperature entering indoor portion of unit. 80F 26.7“C dry bulb Air temperature surrounding unit 80F 26.7“C dry bulb Water temperature entering refrigerant-to- waterheaexchanger 75F 23

39、.9“C Water flow rate . maintained at 110 percent of flow rate specified in high temperature heating test of 5.1.4. IC 6.2.2 Voltages. AR1 STANDARD 325-1 998 - 6.2.2.1 Tests shall be run at 90 percent and 110 percent ofthe units nameplate rated voltage at the units service connection and at rated fre

40、quency, or at a lower than 90 percent minimum or a higher than 110 percent maximum voltage if so listed on the nameplate. 6.2.2.2 The power supplied to the heat pump shali be adjusted just prior to the shut down period (see 6.2.3.2) so that the resulting voltage at the units service connection is 86

41、 percent of nameplate rated voltage when the compressor is on locked rotor. (For those dual voltage units so specifed on their specification sheets for a minimum voltage 5 percent below the lower rated voltage, this locked-rotor voltage setting shall be 91 percent of the lower rated voltage.) 6.2.2.

42、3 Within one minute after the heat pump has resumed continuous operation (see 6.2.4.3), the voltage shall be restored to the values specifed in 6.2.2.1. 6.2.2.4 Single phase dual voltage units whose lower voltage is 208V, which spec on their specification sheets a minimum voltage to be applied at th

43、e unit service connection for the maximum operating conditions test, shall be tested at the lower of this minimum voltage or 198V in accordance with 6.2.2.1, 6.2.2.2 and 6.2.2.3. 6.2.3 Procedure. 6.2.3.1 Theheat pump shall be operated for two hours at the temperature conditions and voltage(s) specif

44、ed. 6.2.3.2 All power to the heat pump shall be cut off for a period mfcient to cause the compressor to stop (not to exceed five seconds) and then restored. 6.2.4 Requirements. 6.2.4.1 During both entire tests, the heat pump shaii operate without failure of any of its parts. 6.2.4.2 The heat pump sh

45、all operate continuously without interruption for-any reason for the two- hour period preceding the power interruption. . 6.2.4.3 The Unit shall resume continuous operation within two hours of restoration of power and shall then operate continuously for one hour. peration and resetting of safety dev

46、ices prior to establishment of continuous operation is permitted. 6.3 Low-Temperature Start and Operate Test leafing). Ground water-source heat pumps shall be designed and produced to pass the following low-temperature start and operate test when operating with air quantities as determined in 5.1.4.

47、3. 6.3.1 6.3.2 Temperature Conditions. Air temperature entering and surrounding indoor portion of unit . 6O0F 15.6“C dry bulb Water temperature entering refrigerant- to-water heat exchanger . .45 “F 7.2 “ Cl Water flow rate maintained at 90 percent of flow rate specified in low temperature heating t

48、est of 5.1.4.ld Procedure. The unit shall soak for 10 minutes with 45F 7.2“C fluid circulating through the coil. The unit shall start and nin for a minimum of 2 hrs. without being interrupted by any type of safety control or limit control. 6.3.3 Requirements. During the entire test, the heat pump sh

49、all operate continuously without damage to the equipment. For a dual voltage unit, unit shall operate continuously at the lower range. 6 COPYRIGHT Air-Conditioning and Refrigeration InstituteLicensed by Information Handling ServicesAR1 STANDARD 325-1998 6.4 Insulation Eflciency Test (Cooling) (Not required for heating-only units). Ground water-source heat pumps shall be designed and produced to pass the following insulation efficiency test wh