| 1. | In this paper , the main purpose is to study different refrigerants and different refrigeration systems at lower evaporating temperature in ideal cycle
本文主要研究不同制冷剂及不同的制冷循环在较低蒸发温度下对制冷性能的影响。 |
| 2. | On the basis of orthogonal test , the optimum procedure parameters were determined . it is evaporating temperature of 750 , reaction pressure of 4000pa and o2 content of 50 %
以此为指标对制备工艺优化，其最佳工艺为：蒸发温度750 、反应压力4000pa和o _ 2在混合气体中的比例50 。 |
| 3. | By means of the experimental data , influences of operating , such as evaporating temperature , cooling water temperature and ma ximal desorption temperature and so on , were analyzed
文章最后对由该单元管构成的余热吸附制冷机的性能进行了测试，并对其工程应用的可行性进行了分析。 |
| 4. | The results are significant . the change of evaporating temperature and control precision influence the temperature fluctuation of the air , which is relevant to the heat - load matching of warehouse and refrigerating units
温度场的波动主要是两个原因引起的：蒸发温度的波动及控制的精度，也就是气调库的热负荷要与机器的负荷相匹配。 |
| 5. | In the condition of same condensation temperature and evaporating temperature , the cop of the basic gax cycle is lower than that of the simplicity cascade cycle , but it is greatly better than the mid - pressure double - effect cascade cycle , on the other hand , the work condition is not as rigor as the simplicity cascade cycle , so the ratio of performance and cost is relatively high
在相同的冷凝温度和蒸发温度下，基本gax循环的性能系数( cop )虽然比单纯复叠循环的低，但要远远优于中压双效复叠循环，而且运行的条件不象单纯复叠循环那样苛刻，故基本gax循环的性价比较高。 |
| 6. | As we all know , the back - pressure valve ( also called evaporating pressure regulator ) is often used to regulate the evaporating temperature of every high - temperature refrigeratory in the system containing many different temperatures but single engine of the ship . but it is neglected that the energy of the system is lost and the efficiency of the system becomes low
众所周知船舶单机多库(简称为高、低温冷库)系统中，常用背压阀(蒸发压力调节阀)来调节各高温库的蒸发温度，但忽略了系统无形损耗的能量，效率也有所下降。 |
| 7. | A ejector for is applied in this theory . it can not only regulate the evaporating temperature of each high - temperature refrigeratory but also reduce the back - pressure of the compressor when a system applies this theory . at the same time , the exhaust temperature of the compressor becomes low and the refrigerating capacity per unit of swept volume becomes high
鉴于目前这种现状，本文提出了以喷射器为基础的船舶高、低温冷库制冷新循环，不但可调节高温库的蒸发温度，而且也可使压缩机的回气压力得到提高，压缩机排气温度降低，单位容积制冷量上升，制冷系数提高，火用效率提高。 |
| 8. | This paper offers some performance data calculate with computer program and figures which variation of performances of refrigeration in different refrigerants and circle with evaporating temperature . it shows that it is feasible to calculate thermodynamic properties of refrigerants with equation of state pr in ideal circle and new refrigerants sfuch as r134a , r152a have not more coefficient of performance ( cop ) than r22 in single - press circle but still have preferable practical value in freezing refrigeration ; the results also demonstrate the importance and need for applying mixed - refrigerant in freezing
本文给出了几种制冷工质在单级和双级压缩制冷循环下的一些性能数据及各性能随蒸发温度变化比较图。结果表明，利用pr方程得出的制冷工质物性，可用于计算制冷循环性能；在单级制冷循环中， r12和r22仍具有较高的制冷系数，但新工质如r134a 、 r152a在较低温度制冷中具有很高的研究价值；计算也表明，在较低温度制冷中，混合工质的研究是极有价值的。 |
| 9. | The thesis focuses on the development of the dynamic simulation model of evaporators , the accomplishment of the stable and dynamic simulation of the parameters of cryogen - side , air - side and how to carry out dynamic simulation on the refrigerating effect of evaporators under different evaporating temperature and the realization of the analyses and calculations of the main parameters , such as , the wind speed of air - side and specific humidity etc , which affect the function of evaporators
本文重点是对蒸发器建立动态仿真模型，并对制冷剂侧和空气侧参数进行稳态和动态仿真，同时对蒸发器在不同蒸发温度下的制冷量进行了动态仿真，而且对影响蒸发器性能的主要参数(空气侧入口风速、入口含湿量等)进行了分析和计算。 |
