| 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: |
NIST TN - 1667 |
| Pages: |
84 pp. |
| 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) |
