Abstract
This paper describes results of a project to develop and compare the performance of a second-generation mobile R-744 air-conditioning system to the first mobile R-744 system tested by our group. An analysis of results obtained with the first-generation system indicated many possible areas of improvement. Thus, the impetus for constructing and subsequently testing the second-generation system was to demonstrate that significant gains in system performance were possible with enhanced system components. Performance enhancements were achieved by introducing a superior compressor and improved heat exchangers. However, the most influential impact on improved performance was the introduction of a cross-counterflow gas cooler. Results of tests at similar operating conditions, including compressor speed, show an 11% to 63% increase in evaporator capacity and a 1.6% to 6.3% increase in COP. Additional tests performed at similar conditions, high-side pressure, and/or evaporator capacity illustrate COP improvements of 7% to 75%.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 542-554 |
| Number of pages | 13 |
| Journal | ASHRAE Transactions |
| Volume | 109 PART 1 |
| State | Published - 2003 |
| Event | Technical and Symposium Papers Presented At the 2003 Winter Meeting of The ASHRAE - Chicago, IL, United States Duration: Jan 26 2003 → Jan 29 2003 |
ASJC Scopus subject areas
- Building and Construction
- Mechanical Engineering