r290

Energy Efficiency Analysis and Energy-saving Discussion of R290 / CO_2 Refrigeration Cycle

R290/CO2制冷循环的能效分析与节能探讨

Experiment of R290 / CO_2 Vapor Compression Cascaded Refrigeration System

R290/CO2蒸气压缩复叠式制冷系统实验

The Analysis of R290 / CO_2 Cascaded Refrigeration Cycle Using an Entropy Generation Minimization Method

利用熵产最小法分析R290/CO2复叠式制冷循环

Experimental study on R744 / R290 in low-temperature circuit of cascade refrigeration system

复叠式制冷系统低温环路制冷剂R744（CO2）/R290的实验研究

Study on practical application of R290 in domestic air-conditioning has a good future for protecting environment and saving energy .

开发R290家用空调，对环境保护、节约能源有着很好的应用前景。

The Performance Matching Research on Propane ( R290 ) in Minitype Room Air Conditioner

R290小型家用空调器的性能匹配研究

The combustibility of R290 can completely control its safety .

R290的可燃性在实际中是完全可以控制其安全性。

The Theoretical and Experimental Research for Natural Refrigerant Propane ( R290 ) and Its Mixtures as Substitute for R22

丙烷及其混合物作为空调制冷剂可行性研究

It can be concluded that R290 / CO_2 and NH_3 / CO_2 natural refrigerants cascaded refrigeration cycle has a good future .

自然工质R290/CO2和NH3/CO2替代常规工质R22/R13复叠式制冷循环有很好的前景。

The thesis studied the situation of performance matching for natural refrigerant propane ( R290 ) instead of R22 in minitype room air conditioners .

本文研究了自然工质丙烷（R290）替代R22在小型家用空调的性能匹配情况。

Based on the experimental data collected , the formulations are selected which can predict accurately in-tube condensation heat transfer coefficients for R290 and R404A .

对于R290和R404A，分别根据各自光管、内螺纹管内凝结换热系数的关联式计算数值与实验数据的比较，筛选出了相应预测精度较好的理论模型。

Establishes the leakage model of R290 / R600a system , analyzes the variation of proportion of working-fluid with different leakage condition , and studies the corresponding performance of system .

建立混合工质R290/R600a在系统中发生泄漏的模型，对系统存在泄漏点时系统内工质组分配比随不同泄漏情况发生时的变化进行分析，其后对相应的系统性能的变化进行了研究。

Hydrocarbon mixtures are environmental benign refrigerants , R170 ( ethane ) can be used obtained low temperature , and R290 is used to be refrigerant of high temperature stage .

碳氢化合物是环境友好的制冷剂，其中可用于制取低温的有R170等，而R290可以用作高温级制冷剂。

The results show the mixture of R290 / R152a / R600a has bigger refrigerating capacity per unit quality and COP . It is an ideal refrigerating medium .

结果表明，由R290R152aR600a组成的混合物具有较大的单位质量制冷量和COP，是较理想的制冷工质。

The solubility of propane ( R290 ) , the natural refrigerant , with different kinds of refrigerating oil has become the focus to the substitutes for CFCs and HCFCs .

天然绿色制冷剂丙烷（R290）与冷冻油的互溶特性研究已成为替代CFCs和HCFCs的焦点。

The coefficient of performance of R290 / CO_2 cascaded refrigeration cycle can be enhanced by using rotary compressor without suction and discharge valves and by replacing throttle with expander in CO_2 low temperature cycle .

在CO2循环中可利用无吸排气阀的回转式压缩机，用膨胀机代替节流阀，以提高R290/CO2复叠式制冷循环的性能系数。

And the experiment system is built . With the reverse-Brayton cycle , the comparing tests are conducted for the mixture of R290 / R152a / R600a and the mixture of R744 / R600a .

搭建了实验台，对由R290R152aR600a组成的混合物和由R744R600a组成的混合物，应用于逆向布莱顿循环，进行了对比实验。