As two means to get a low temperature,two-stage compression cycle and cascade cycle have their advantages of economical performance in different temperature range.

Puts forward a cascade heat pump unit to solve some application problems of conventional units in winter in cold regions,such as high compression ratio and low heating efficiency.

On the thermoluminescence curve of quartz, there exists a superimposed compounding interval of about±20℃ for any specific peak relative to the neighboring peak.

AIM: To form soluble HLA-G1-peptide complex by refolding in vitro, and study its immune function.

Strategies for decreasing the formation of inclusion bodies, isolation and resolution of inclusion bodies, and refolding of inclusion body proteins were included.

Some methods were introduced to solve the problem that was encountered when applying ASHP in colds regions, these includes as employing two-stage compression and cascade cycle to decrease pressure ratio, employing variable frequency compressor to increase refrigerant cycle volume, employing Turbo technology, high efficiency compressor and he.

The cascade heat pump unit functions in both single-stage cycle and cascade cycle by optimizing control conditions and maximizing energy-saving.

A Cascade Air Source Heat Pump Water Heater with PMC;

An Experimental Study of Cascade Refrigerating Cycle with Natural Working Fluids R290 and CO_2;

In order to give attention to the economy of HPWH based on the satisfaction of its ability of heating,this article puts forward a new kind of HPWH which is a coupling of a cascade structure and a heat conservation implement filled with PCM(Phase Change Materials).

Some key problems of design of R404A/R23 cascade refrigeration unit;

Analysis of CO_2/NH_3 cascade refrigeration system;

Experimental study on starting characteristic of cascade refrigeration system