@article {8040,
	title = {Exergetic optimization of a key design parameter in heat pump systems with economizer coupled with scroll compressor},
	journal = {Energy Conversion and Management},
	volume = {48},
	year = {2007},
	pages = {1150-1159},
	publisher = {Elsevier},
	isbn = {0196-8904},
	author = {Ma, Guoyuan and Li, Xianguo}
}
