PART-LOAD PERFORMANCE OF ON-OFF AIR-COOLED CHILLERS
The nominal Energy Efficiency Ratio (EER) as defined and measured under European Standard EN 14511 does not enable the performance characterisation of a chiller under real usage conditions. This is because the rating conditions and methods do not take into account the changes in outdoor conditions and building load. In order to calculate the real airconditioning system electricity consumption, part-load performance must therefore be accounted for. In 2006, Eurovent Certification implemented a certification scheme to calculate a European Seasonal Energy Efficiency Ratio (ESEER) for staged capacity chillers. In order to extend the ESEER concept to the residential application sector on a sound and fair basis, testing was conducted at CETIAT on small capacity air-cooled chillers. This paper shows the testing methodology and the results obtained on an On-Off air-cooled chiller which was tested at 100％, 75％, 50％ and 25％ loads at 35℃, 30℃, 25℃ and 20℃ outdoor conditions.The results from this exhaustive testing show in particular that the part-load energy efficiency can be related to full load efficiency at all outdoor temperatures following a unique relationship. This means that on-off chiller part-load performance can be predicted from a number of full-load tests and only a single part-load test measurements. Alternatively, as a less accurate and default method, stand-by power measurement can be used to calculate partload performance during cycling.
A.BENSAFI N.GAILLARD J.M.MORIN
Centre Technique des Industries Aérauliques et Thermiques (CETIAT) BP 2042 – 69603 Villeurbanne Cedex France
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）