EXPERIMENTAL STUDY OF TEMPERATURE STRATIFICATION IN A THERMAL STORAGE TANK IN THE STATIC MODE FOR DIFFERENT ASPECT RATIOS

Thermal stratified storage tanks are an effective method to improve the efficiency of thermal storage devices that are commonly used in thermal systems when the available energy source is irregular or when a time lag exists between the production and the demand. It has been shown that thermal strati...

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Bibliographic Details
Published in:ARPN journal of engineering and applied sciences 2011-02, Vol.6 (2), p.53-60
Main Authors: Khalifa, Abdul Jabbar N, Mustafa, Ayad T, Khammas, Farhan A
Format: Article
Language:English
Subjects:
Devices
Stagnation
Storage tanks
Stratification
Tanks
Thermal properties
Thermal storage
Time lag
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Summary:Thermal stratified storage tanks are an effective method to improve the efficiency of thermal storage devices that are commonly used in thermal systems when the available energy source is irregular or when a time lag exists between the production and the demand. It has been shown that thermal stratification is affected by a number of factors such as mixing due to the inlet and outlet streams, heat losses to the environment and tank configuration such as the aspect (height to diameter) ratio. Thermal behavior and stratification of hot water storage tanks during the stagnation mode is investigated experimentally in this study for three different aspect ratios (AR) of the tank, namely 2, 1 and 1/2. The study addresses the change in water stratification during the cool down of the water inside the storage tank of thermal systems in the 85oC to 30oC temperature range, which lies within the operating range of most conventional and solar hot water and liquid based heating systems.
ISSN:1819-6608
1819-6608