不好意思..附上專有名詞：鰭片間距 fin pitch ；管排數排列 tube rows arrangement ; 氣冷式冰水主機 air-cooled liquid chiller
- Anonymous1 decade agoFavorite Answer
The primary purpose of this research is as follows: Utilizing the CFD current simulation and heat exchange/heat conducting analysis, in lieu of traditional air-cooled water cooler condensation plate distributes air currents unevenly and unsteadily, to devise seven breakthrough condensation tubes and to discuss the influence of such inventions on the cold air circulation in the air-cooled water cooler's condenser, in order to find the best configuration which would lead to improved heat transfer efficiency of the condenser and in turn increase the machine's overall efficiency.
Research results show that by changing the distance between fins on the tube plate, it can only lower total cost, but it does not increase volume of heat transferred, nor does it stabilize wind speed inside and outside of the tube plate. The change in heat transfer volume is also neglectable.
Changing tube plate fins distance yielded best results in case D2. Compared to those of case A, the average wind speed and heat transfer volume increased by 13.51% and 3.23% respectively; and 3.86% increase in wind speed but 0.51% decrease in heat transfer volume compared to results in case C.
By changing the number of tubes and their arrangement in the tube plat, it helps distribute air currents more evenly among the inside and outside of the tube plate.
Case F appears to be the best configuration. It improves wind speed distribution and stabilizes average wind speeds on the inside and outside of the tube plate. The results of this case show an increase in average wind speed of 20.42% and a 10.28% increase in total heat transfer volume compared to those in case A; and a 9.59% and 4.9% respective improvement compared to case C.
註: 很多專有名詞我不知道你應該要再去查查...Source(s): myself
- ☆ 〃╭ 璇 × ╮Lv 71 decade ago
The thesis summary looks through Great Britain while needing - Hope the English past master can help - This main purpose of research is: Utilize CFD air current simulation and hot to is it analyse condensation serpentine air current distribute all kinds of inequality and internal and external inconsistent shortcomings to traditional air cooling frozen water machine to spread heat exchanger, design seven kinds of innovative condensation serpentines, probe into the influence that the innovative condensation serpentine is distributed to the air cooling type frozen water host computer condenser air current, attempt to find out the optimum design disposition, achieve and improve the hot biography performance of the condenser and purpose to improve aircrew's energy efficiency.
A a result find , change one scene of intervals of serpentine fin, can lower costs and can not raise the hot spreading amount only, and unable to make the internal and external serpentine have more unanimous average wind speed, and the hot spreading amount only has small range that changes, it is best to change one scene of intervals of serpentine fin and is distributed with case D2, on a basis of case A, wind speed and heat are spread and improved by 13.51% and 3.23% respectively on average, relatively case C improve by 3.86% and - 0.51%.
Change one and manage and arrange and count arranging, can make the internal and external serpentine have more even air currents to distribute, case F is the best design, can improve the wind speed maldistribution, and the average wind speed of internal and external serpentine is comparatively consistency, case A it improves to be 20.42% relatively, hot spreading amount 10.28% always; Relatively case C is improving as 9.59% and 4.9%.Source(s): 我是應外系^^