scholarly journals Evaluating a prototype compact thermal energy storage tank using paraffin-based phase change material for domestic hot water production

2019 ◽  
Vol 116 ◽  
pp. 00016
Author(s):  
George Dogkas ◽  
John Konstantaras ◽  
Maria K. Koukou ◽  
Vassilis N. Stathopoulos ◽  
Luis Coelho ◽  
...  
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Storage System ◽  
Energy Storage System ◽  
Hot Water ◽  
Domestic Hot Water ◽  
Tube Heat Exchanger

A full-scale thermal energy storage system using phase change materials (PCM) is experimentally investigated for solar and geothermal applications. The system consists of a rectangular tank filled with PCM and a staggered fin tube heat exchanger (HE). The system is designed for the production of Domestic Hot Water (DHW) based on the EU Commission Regulation No 814/2013 [1] requirements. The characteristics that are studied are the stored energy density of the system, the heat transfer rate through the HE during the charging and discharging processes, the adequacy of produced hot water amount and the storage efficiency of the tank. The results of the experiments confirmed the potential of the system to meet several prerequisites of a DHW installation and in addition to make the operation of the coupled solar collector or ground heat pump efficient.

Experimental Study of Thermal Energy Storage in Solar System Using PCM

2012 ◽  
Vol 433-440 ◽  
pp. 1027-1032 ◽  
Author(s):  
B. Kanimozhi ◽  
B.R. Ramesh Bapu
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Phase Change ◽  
Latent Heat ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Storage System ◽  
Hot Water ◽  
Copper Tube

This paper summary the investigation and analysis of thermal energy storage extracted from solar heater and use for domestic purpose. Choosing a suitable phase change materials paraffin wax used for storing thermal energy in insulation tank. The tank carries minimum of 45 liters capacity of water and 50 numbers copper tubes each copper tube carries minimum of 100 grams PCM materials. Inside the tank phase change materials are receiving hot water from solar panel. This solar energy is stored in Copper tubes each copper tube contains PCM Materials as latent heat energy. Latent heat is absorbed and stored in Copper tubes .Large quantity of solar energy can be stored in a day time and same heat can be retrieved for later use. The tank was instrumented to measure inlet and outlet water temperature. The differences of temperature of the water is measured in a definite interval of time have been noted then calculating heat transfer rate and system effectiveness. The heat storage system is to be applied to store solar energy and the stored heat is used for domestic hot water supply system.

Design of a Latent Thermal Energy Storage System From Constructal Approach

2017 ◽  
Author(s):  
Sylvie Lorente
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Optimal Allocation ◽  
Storage System ◽  
Melting Process ◽  
Energy Storage System ◽  
Theoretical And Numerical Analysis

This work presents a theoretical and numerical analysis of thermal energy storage obtained from Phase Change Materials. We start with a study of the early stages of natural convection in the liquid, followed by an analysis of the entire duration of the melting process. Both are based on scale analysis. The numerical simulations cover the entire process, and validate all the features predicted by theory. Next we apply the methodology to the design of an efficient storage system made of a tank filled with a Phase Change Material like paraffin wax. A hot fluid circulates through pipes located within the tank; it is heated by means of a solar panel. The total volume of tubes is fixed. We apply Constructal design to determine the optimal allocation of the hot tubes so that each transfer mode is used at the best moment. We demonstrate that the overall energetic performance can be improved by endowing the system with freedom to morph.

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