IEEE 802.16J:2009 pdf free download

IEEE 802.16J:2009 pdf free download.Methods of Testing for Rating Liquid Coolers.
8. TEST PROCEDURE
8.1 General
The liquid cooler, the selccted instruments, and test apparatus shall be assembled, connected. tested. dehydrated, evacuated. and chargcd with refrigerant. If ncccssary, refrigerant subcoolers. superheaters. or hcat cxchangcrs shall be used to cnsurc accuracy of measurements and to obtain specified conditions. If designed and included as a specific part of the cooler assembly, any such superheater, subcooler, or heat exchanger shall be considered a part of the liquid cooler.
8.2 Operation and Limits
8.2.1 The system shall be started, and the specified conditions shall be obtained and maintained in accordance with the following tolerances. After establishment of steady-state and steady flow conditions, take all required readings at intervals of not less than 15 minutes and continue the test until four consecutive sets of readings are within these specified conditions.
(a) The arithmetic average of pressure readings used to determine refrigerant enthalpies shall not vary from the required values by more than 2.0% of their absolute values, nor shall the individual pressure readings vary by more than this amount from the average value. Convert pressure readings to absolute values to determine refrigerant saturated temperatures.
(b) The arithmetic average of pressure readings used to determine the specified value of refrigerant saturated temperahire shall not vary from the required value by more than the equivalent of 0.3°C (0.5°F). nor shall the individual pressure readings vary by more than this equivalent from the average value.
(c) The arithmetic average of temperature readings of liquid leaving the cooler shall not vary from the specified value by more than 0.3°C (0.5°F). nor shall the individual readings vary by more than this amount from the average value.
(d) The individual temperature readings of liquid entering the cooler, and water entering and leaving the condenser when used for the confirming test, shall not vary by more than 0.3°C (0.5°F) from these average values.
(e) The arithmetic average of temperature readings of the superheat of the leaving refrigerant shall not be below the temperature specified.
(f) The arithmetic average of the refrigerant temperature entering the expansion device shall not vary from the specified value by more than 3°C (5°F) nor shall the individual temperature readings vary by more than 1°C (2°F) from the average value.
8.2.2 In the test record, include the date, observers’ names, essential identifying physical data of the cooler tested. refrigerant and liquid used, all test readings. rekrences to instrument calibrations and computations. and the determined results.
8.3 Computation of Results
8.3.1 From the primary test, calculate the net refrigeration capacity qH from the heat removed from the liquid as shown in Equation 4.