ANALYSIS OF AN OPEN LOOP PULSATING HEAT PUMP’S PERFORMANCE

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SHOKOUHMAND H.; BAHRAMI HAFEZ

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Journal: Year:2008 | Volume:42 | Issue:1 (111) Page(s): 77-86

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Title

ANALYSIS OF AN OPEN LOOP PULSATING HEAT PUMP’S PERFORMANCE

Author(s)

SHOKOUHMAND H. | BAHRAMI HAFEZ | Issue Writer Certificate

Keywords

CONDENSERQ3

EVAPORATORQ3

FILLING RATIOQ3

OPEN LOOP PHPQ3

PERFORMANCEQ3

Abstract

In this study an analytical model for open loop pulsating heat pipes (PHPs) is presented. The model predicts the effect of different parameters such as EVAPORATOR temperature, length of EVAPORATOR, FILLING RATIO, number of turn and tube diameter on PHP's PERFORMANCE. The governing equations in two phase flow including mass, momentum and energy equations are solved for both one dimensional liquid slugs and lumped vapor plugs numerically. The model includes the thin film layer concept which contributes to heat transfer in EVAPORATOR and CONDENSER section. A proper model is also investigated to describe the steady oscillatory behavior of device. The results show that this model predicts well the oscillatory behavior of the phenomena. The obtained results are in good agreement with available data and can be properly used for predicting the trend of effective parameters on PHP's PERFORMANCE. It is found that sensible heat transfer has extremely more important role in increasing total heat transfer of PHP. The thermal resistance decreases due to increasing of the latent heat transfer. It can be seen that increasing of the EVAPORATOR temperature, while the temperature of the CONDENSER is constant, will increase the total evacuated heat by PHP in specific FILLING RATIO limits. The results show that the PHP's PERFORMANCE increases when the tube diameter increases. In this case, by using a specific non-dimensionalized model, a unique curve for arbitrary number of turn and FR can be obtained. Also it is found that PHP's PERFORMANCE reaches its maximum at FILLING RATIO around 0.6 for different tube diameters.

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APA: Copy

SHOKOUHMAND, H., & BAHRAMI, HAFEZ. (2008). ANALYSIS OF AN OPEN LOOP PULSATING HEAT PUMP’S PERFORMANCE. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 42(1 (111)), 77-86. SID. https://sid.ir/paper/14468/en

Vancouver: Copy

SHOKOUHMAND H., BAHRAMI HAFEZ. ANALYSIS OF AN OPEN LOOP PULSATING HEAT PUMP’S PERFORMANCE. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2008;42(1 (111)):77-86. Available from: https://sid.ir/paper/14468/en

IEEE: Copy

H. SHOKOUHMAND, and HAFEZ BAHRAMI, “ANALYSIS OF AN OPEN LOOP PULSATING HEAT PUMP’S PERFORMANCE,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 42, no. 1 (111), pp. 77–86, 2008, [Online]. Available: https://sid.ir/paper/14468/en

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