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NIST Authors in Bold
|Author(s):||William V. Payne;|
|Title:||Development and Verification of a Linear-Fit Mixed System Rating Method for Unitary Two-Speed and Variable-Speed Air Conditioners|
|Published:||June 07, 2010|
|Abstract:||A linear-fit method of rating residential-type air conditioning systems was evaluated based on performance predictions and laboratory testing of one two-speed matched system and two mixed systems (matched two-speed condensing unit, matched indoor coil blower, and two mixed coil blowers). The individual evaporators and the condensing unit were separately tested using water heated/cooled condensing/evaporating units at standard air conditions over a range of evaporator refrigerant saturation temperatures, evaporator superheats, and liquid refrigerant temperatures. Capacity predictions were within ±1.0 % of the tested values for the mixed systems, and the EER predictions were within ±1.5 % of the measured EERs. The methods used for system rating on the two-speed system can also be applied to a variable-speed system.|
|Citation:||Technical Note (NIST TN) - 1667|
|Keywords:||air conditioner, cooling capacity, mixed system, rating procedure, SEER, two-speed system, variable-speed system|
|Research Areas:||Building Energy Conservation, Building Equipment Efficiency, Sustainability Metrics and Tools|
|PDF version:||Click here to retrieve PDF version of paper (4MB)|