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Temperature Profile and Thermocline Thickness Evaluation of a Stratified Thermal Energy Storage Tank

Waluyo, Joko and Abd Majid, Mohd Amin (2010) Temperature Profile and Thermocline Thickness Evaluation of a Stratified Thermal Energy Storage Tank. [Citation Index Journal]

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Abstract

Determination of thermocline thickness requires a continuous profile of temperature distribution. Difficulty in determining thermocline thickness arises for the case of discrete temperature data, since the profile formed could not be used to estimate the thermocline thickness. This paper discusses a practical method for formulation of thermocline thickness of stratified thermal energy storage. Curve fitting by iterative method was adopted to identify the functions which could represent the S-curve of temperature distribution. Based on the functions, thermocline thickness was formulated using functional relationship of temperature profile. Results identified two functions which could represent S-curve of temperature distribution, namely sigmoid dose response (SDR) and four parameter sigmoid (FPS) functions. Both functions were observed to well fit the temperature distributions having coefficient determination more than 0.99. Based on evaluations the formulations were capable to be utilized for evaluation of thermocline thickness of the stratified TES. The methods offer an advantage to obtain an exact value of thermocline thickness. Keyword: temperature distribution

Item Type:Citation Index Journal
Subjects:T Technology > TJ Mechanical engineering and machinery
H Social Sciences > H Social Sciences (General)
C Auxiliary Sciences of History > C Auxiliary sciences of history (General)
Departments / MOR / COE:Departments > Mechanical Engineering
ID Code:414
Deposited By: AP Ir Dr Mohd Amin Abd Majid
Deposited On:14 Apr 2010 06:06
Last Modified:19 Jan 2017 08:25

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