YZ20型振动压路机水油组合散热器选型设计

结合振动压路机水油组合散热器的选型设计过程,提出散热器的选型原则及设计要点。并且探讨了水油组合散热器和风扇的最佳匹配原理,提出一种简单有效的综合冷却能力分析方法,解决了大吨位压路机发动机散热不良引起高温的问题。

串联式冷却系统在纯电动汽车的设计

一个良好的冷却系统系统,需要考虑其空间布置、需冷却电器的冷却顺序、冷却系统各部件的散热能力及功耗等多种因素。通过对冷却系统布置,可以减小了冷却系统对散热器散热能力的要求,而理论计算分析能够对系统各部件做性能校核比较直观,二者结合能够较好的反映冷却系统性能情况。

Effect of Temperature Differentials on Condensers of Split-Type Air Conditioners in Apartment Buildings

Analyzing the effects of heat rejection from condensers of split-type air-conditioning units at lower-floors of MLABs （multi-level apartment buildings）, using field measurements to monitor environmental conditions and condenser operation, revealed increases in the inlet air temperature at the condensers at the upper floors, which in turn increased the power and energy requirements for these units and decreased their cooling capacities. Results indicated that a decrease of up to 16,000 tons in cooling capacity and an increase of up to 67.2 MW in the national peak load demand might be reached for a 4 ℃ temperature differential for Kuwait conditions. It is recommended that the condensers be placed in the wind pathway to minimize the impact of heat rejection and stack effect and to optimize the operation of split-type air-conditioning units, and that other factors regarding installation setup and location are investigated.