制冷剂

However,cryogen R134a cannot supply enough cooling capacity for the laser surgery in patients with darker skin because of the absorption of laser energy by melanin.

目前采用的R134a制冷剂不易抵消深色人种皮肤的黑色素对激光能量的大量吸收，采用沸点更低的R404a制冷剂可以更好保护黄色与黑色人种的皮肤。

The cooling process involves complex droplet evaporation, strong convective heat and mass transfer, therefore a deep understanding of spray characteristics is essential to optimize the nozzle design and improve the cooling efficiency of the spray. This paper presents a theoretical model to describe the equilibrium evaporation process of a single droplet in cryogen spray.

为了深入了解制冷剂喷雾特性以提高冷却效率、优化喷嘴设计，利用质量传递数法推导传质方程，通过选取合适的阻力系数经验关联式建立了动量方程，考虑液滴蒸发以及与环境气体的对流换热建立了液滴能量方程，初步建立了单个制冷剂液滴平衡蒸发阶段蒸发冷却理论模型。

Solve and suck attitude bed discharge high-temperature refrigeration pharmaceutical vapour of high pressure to condenser, absorb attitude bed absorb low temperature low-voltage vapour in the evaporimeter, Make the pharmaceutical vapour of refrigeration evaporate refrigeration constantly.

解吸态床向冷凝器排放高温高压的制冷剂蒸气，吸附床则吸附蒸发器中低温低压的蒸气，使制冷剂蒸气在解吸床中不断蒸发制冷。

Suck attitude bed solve and suck high-temperature refrigeration pharmaceutical vapour of high pressure that come out among condenser the condensation solving, Through flow regulating valve, turn low temperature low-voltage liquid into , enter evaporimeter evaporate refrigeration, Absorb refrigeration pharmaceutical vapour of evaporation attitude bed absorb again.

从解吸态床解吸出来的高温高压的制冷剂蒸气在冷凝器中被冷凝后，经过流量调节阀，变成低温低压的液体，进入蒸发器蒸发制冷，被蒸发的制冷剂蒸气重新被吸附态床吸收。

Based on the solution theory, the molecular congregation and van der waals model, the interaction among refrigerant molecules has been studied and a fugacity model has been proposed for mixed gas hydrates.

本文运用分子聚集理论和溶液理论，结合van der Waals模型，通过考虑制冷剂气体分子间的相互作用力，建立了制冷剂混合气体水合物逸度计算模型。

Model is composed of heat exchange equation of side of air and heat exchange equation side of refrigeration.

程序的输入量为结构参数，空气，制冷剂的入口状态等，经迭代计算求解制冷剂的出口状态。

The molecular parameters for 18 refrigerants were obtained by fitting saturated vapor pressure and liquid molar volume data. The overall average deviations of saturated vapor pressure and liquid molar volume were only 1.11% and 0.92%, respectively.

通过关联不同温度下制冷剂的饱和蒸气压和液体体积得到了18种纯制冷剂的分子参数，新方程计算的饱和蒸气压和液体体积总的平均偏差分别为1.11％和0.92％。

As a developing country, there still have 30 years to stop the production and distribution of R 22 in China , and there are very few technical obstacles in substituting C22 for R 410A . But the substitution will follow with the higher costs of production. And because of the threat of 揼 lobal warming? the future of R 410A is still unclear. How can the air-conditioner industry deal with this problem?

作为发展中国家，中国距最终禁止 R22 的生产与销售还有 30 余年，虽然目前进行绿色制冷剂的替代在技术上的障碍并不多，但随之而来的却是空调生产成本的提高，而且面对着全球变暖的问题， R 410A 等绿色制冷剂的前景还并不明朗，那么在这个问题上，空调行业将走向何方？

The new type mixed refrigerant contains HFC131, HFC134a and CO2, the above-mentioned three working substances not only can be used as refrigerant, but also can be used as tire retardent in the refrigerating system.

新型绿色混合制冷剂，含有HFC13I，HFC134a，CO 2 ，以上三种工质在制冷系统中除做为制冷剂外，也做为阻燃剂。

When the carbon is at room temperature, it adsorbs the refrigerant and when heated the refrigerant is driven out.

当碳在室温条件下它就吸附制冷剂，当在加热时吸附的制冷剂就被释放出来。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。