ASHRAE 41 9 ERTA-2017 Standard Methods for Volatile-Refrigerant Mass Flow Measurements Using Calorimeters.pdf

1、Page 1 of 2 2017 ASHRAE. All rights reserved. ERRATA SHEET FOR ANSI/ASHRAE STANDARD 41.9-2011 Standard Methods for Volatile-Refrigerant Mass Flow Measurements Using Calorimeters April 18, 2017 The corrections listed in this errata sheet apply to ANSI/ASHRAE Standard 41.9-2011. The first printing is

2、identified on the outside back cover as “Product Code: 86133 3/11”. Page Erratum 5 7.1.8.2. Revise Section 7.1.8.2 and replace Equation 7-1 as shown below. 7.1.8.2 The heat leakage coefficient is shall be determined using the following equation Equation 7-1: nullnullnullnullnullnullnullnullnullnulln

3、ullnullnull(7-1) nullnullnullnullnullnullnullnullnullnullnullnullnull(7-1) 5 7.1.8.3. Revise Section 7.1.8.3 as shown below. 7.1.8.3 Heat leakage measured during the test is at each refrigerant mass flow rate test point shall be determined using Equation 7-2: nullnullnull nullnullnullnullnullnullnul

4、lnullnullnull (7-2) where qhqr= measured calorimeter heat input leakage out of the calorimeter during heat leakage testing, kW (Btu/h) qa= calculated heat leakage into the calorimeter during refrigerant mass flow rate testing, kW (Btu/h) AUa= heat leakage coefficient, kW/C (Btu/hF) ts= secondary ref

5、rigerant saturated temperature, C (F) ta= mean ambient temperature around the calorimeter, C (F) 9 9.1.7.2. Revise Section 9.1.7.2 and replace Equation 9-1 as shown below. 9.1.7.2 The heat leakage coefficient is defined as shall be determined using Equation 9-1: nullnullnullnullnullnullnullnullnulln

6、ullnullnullnull(9-1) nullnullnullnullnullnullnullnullnullnullnullnullnull(9-1) 9 9.1.7.3. Revise Section 9.1.7.3 and replace Equation 9-2 as shown below. Page 2 of 2 2017 ASHRAE. All rights reserved. 9.1.7.3 Heat leakage at the time of the test is given by at each refrigerant mass flow rate test poi

7、nt shall be determined using Equation 9-2: nullnullnull nullnullnullnullnullnullnullnullnullnull (9-2) nullnullnull nullnullnullnullnullnullnullnullnullnull (9-2) where qr= measured heat leakage out of the calorimeter during heat leakage testing, kW (Btu/h) qa= calculated heat leakage into the calorimeter during refrigerant mass flow rate testing, kW (Btu/h) AUa= heat leakage coefficient, kW/C (Btu/hF) ta= mean ambient temperature around the calorimeter, C (F) ts= mean surface temperature of the pressure vessel, C (F)