Through the research on petroleum and nature gas, design a multi-source heatpump of single and double effect lithium bromide, the two stage heatpump unit, process of nature gas liquefaction etc.

通过对石油天然气物性的,用热泵机的特点,设单效制冷供热热泵机、双效热泵机、双级热泵机及天然气液化流程。