Numerical and experimental investigation on a latent heat thermal storage device featuring flat micro heat pipe arrays with offset strip fins

2021 ◽  
Vol 41 ◽  
pp. 102880
Author(s):  
Yanhua Diao ◽  
Qian Qin ◽  
Zeyu Wang ◽  
Yaohua Zhao ◽  
Chuanqi Chen ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Latent Heat ◽  
Thermal Storage ◽  
Storage Device ◽  
Micro Heat Pipe

Experimental investigation for the optimization of heat pipe performance in latent heat thermal storage

2017 ◽  
Vol 31 (6) ◽  
pp. 2627-2634 ◽  
Author(s):  
Chandrakishor Ladekar ◽  
S. K. Choudhary ◽  
S. S. Khandare
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Latent Heat ◽  
Thermal Storage

Experimental investigation of a novel thermal storage solar air heater (TSSAH) based on flat micro-heat pipe arrays

2021 ◽  
Vol 173 ◽  
pp. 639-651
Author(s):  
Tengyue Wang ◽  
Yaohua Zhao ◽  
Yanhua Diao ◽  
Cheng Ma ◽  
Yubin Zhang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Thermal Storage ◽  
Solar Air Heater ◽  
Air Heater ◽  
Micro Heat Pipe

NUMERICAL AND EXPERIMENTAL INVESTIGATION ON A NEW TYPE ELECTRICAL HEAT STORAGE BASED ON FLAT MICRO HEAT PIPE

2018 ◽  
Author(s):  
Zeyu Wang ◽  
Yanhua Diao ◽  
Yaohua Zhao ◽  
Chuanqi Chen ◽  
Lin Liang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Heat Storage ◽  
Micro Heat Pipe ◽  
New Type

Analysis of a Latent Heat Storage Device With Radial Fins

2013 ◽  
Author(s):  
Y. Kozak ◽  
T. Rozenfeld ◽  
G. Ziskind
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Latent Heat ◽  
Close Contact ◽  
Thermal Storage ◽  
Ambient Air ◽  
Contact Melting ◽  
Storage Device ◽  
Melting Time ◽  
Cfd Model

Phase-change materials (PCMs) can store large amounts of heat without significant change of their temperature during the phase-change process. This effect may be utilized in thermal energy storage, especially for solar-thermal power plants. In order to enhance the rate of heat transfer into PCMs, one of the most common methods is the use of fins which increase the heat transfer area that is in contact with the PCM. The present work deals with a latent heat thermal storage device that uses a finned tube with an array of radial fins. A heat transfer fluid (HTF) flows through the tube and heat is conducted from the tube to the radial fins that are in contact with the bulk of the PCM inside a cylindrical shell. The thermal storage charging/discharging process is driven by a hot/cold HTF inside the tube that causes the PCM to melt/solidify. The main objective of the present work is to demonstrate that close-contact melting (CCM) can affect the storage unit performance. Accordingly, two different types of experiments are conducted: with the shell exposed to ambient air and with the shell submerged into a heated water bath. The latter is done to separate the PCM from the shell by a thin molten layer, thus enabling the solid bulk to sink. The effect of the solid sinking and close-contact melting on the fins is explored. It is found that close-contact melting shortens the melting time drastically. Accordingly, two types of models are used to predict the melting rate: numerical CFD model and analytical/numerical close-contact melting model. The CFD model takes into account convection in the melt and the PCM property dependence on temperature and phase. The analytical/numerical CCM model is developed under several simplifying assumptions. Good agreement is found between the predictions and corresponding experimental results.

Experimental Investigation on a Latent Heat Thermal Storage Unit for Solar Cooling Application

ENERGYO ◽  
2018 ◽  
Author(s):  
L. Chidambaram ◽  
A. S. Ramana ◽  
G. Kamaraj ◽  
R. Velraj
Keyword(s):  
Experimental Investigation ◽  
Latent Heat ◽  
Thermal Storage ◽  
Storage Unit ◽  
Solar Cooling

Mathematical models for the study of solidification within a longitudinally finned heat pipe latent heat thermal storage system

1999 ◽  
Vol 40 (15-16) ◽  
pp. 1765-1774 ◽  
Author(s):  
Bogdan Horbaniuc ◽  
Gheorghe Dumitrascu ◽  
Aristotel Popescu
Keyword(s):  
Mathematical Models ◽  
Heat Pipe ◽  
Latent Heat ◽  
Storage System ◽  
Thermal Storage

Experimental Investigation of Micro Heat Pipe Radiators in Radiation Environment

2001 ◽  
Author(s):  
Y. X. Wang ◽  
G. P. Peterson
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Heat Transport ◽  
Radiation Efficiency ◽  
Wire Diameter ◽  
Radiation Environment ◽  
Transport Capacity ◽  
Maximum Heat ◽  
Micro Heat Pipe

Abstract A flexible micro heat pipe radiator, fabricated by sintering an array of aluminum wires between two thin aluminum sheets, was developed as part of a program to conceptulize, develop, and test lightweight, flexible radiator fin structures for use on long-term spacecraft missions. A detailed experimental investigation was conducted to determine the temperature distribution, maximum heat transport capacity, and radiation efficiency of these micro heat pipe radiators in a radiation environment. Experimental results from three Aluminum-Acetone micro heat pipe radiators with wire diameters of 0.635 mm, 0.813 and 1.016 mm are presented, evaluated and discussed. The results of the experimental program indicted that the maximum heat transport capacity and radiation efficiency, both increased with increasing wire diameter. The maximum heat transport capacity of the micro heat pipe radiator utilizing a wire diameter of 0.635 mm was 15.2 W. The radiators utilizing wire diameters of 0.813 mm and 1.016 mm never reached the maximum heat transport capacities for the given test conditions. In the tests, temperature distributions were recorded for several sink temperatures and indicated that as the sink temperature decreased the radiation efficiency decreased for a given heat input. The maximum heat transport capacity increased with increasing evaporating temperature for the micro heat pipe radiator utilizing a wire diameter of 0.635 mm. Comparison of micro heat pipe radiators with and without working fluid, indicated that significant improvements in temperature uniformity and radiation efficiencies could be obtained, especially at high heat fluxes. A maximum radiation efficiency of 0.95 was observed. In general, while some variation in performance was observed, all three micro heat pipe radiators were found to be capable of meeting the thermal requirements of long-term missions.

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