TY - JOUR
TI - ASSESSMENT OF R290 AS A POSSIBLE ALTERNATIVE TO R22 IN DIRECT EXPANSION SOLAR ASSISTED HEAT PUMPS
AU - Paradeshi Lokesh
AU - Mokkala Srinivas
AU - Simon Jayaraj
JN - Thermal Science
PY - 2017
VL - 21
IS - 12
SP - 369
EP - 378
PT - Article
AB - In this paper, the energy performance of a direct expansion solar assisted heat pump has been experimentally assessed with R290 as an alternative to R22 to meet the requirements of Kigali agreement. The experiments have been per-formed at Calicut climatic conditions (latitude of 11.15° N, longitude of 75.49° E) during the winter climates of 2016. The performance parameters such as, compressor power consumption, condenser heating capacity, energy perfor-mance ratio, and solar energy input ratio were evaluated for energy perfor-mance comparison. The results showed that, R290 has 6.8% higher energy per-formance ratio when compared to R22, with 11% reduction in compressor pow-er consumption. Moreover, R290 has negligible global warming impact and zero ozone depletion potential when compared to R22. The effect of wind speed, col-lector area, ambient temperature, and solar insolation on the system perfor-mance found to be with an average value of 0.85%, 12%, 2.5%, and 4.5% for the selected refrigerants, respectively.