scholarly journals Design of a Latent Heat Energy Storage System Coupled with a Domestic Hot Water Solar Thermal System

2011 ◽  
Author(s):  
Robynne Murray ◽  
Louis Desgrosseilliers ◽  
Jeremy Stewart ◽  
Nick Osbourne ◽  
Gina Marin ◽  
...  
Keyword(s):  
Energy Storage ◽  
Latent Heat ◽  
Storage System ◽  
Energy Storage System ◽  
Heat Energy ◽  
Hot Water ◽  
Solar Thermal ◽  
Thermal System ◽  
Domestic Hot Water ◽  
Solar Thermal System

A Hybrid Energy Storage System Based on Metal Hydrides for Solar Thermal Power and Energy Systems

2016 ◽  
Author(s):  
Shahin Shafiee ◽  
Mary Helen McCay
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Storage Systems ◽  
Storage System ◽  
Metal Hydrides ◽  
Energy Storage System ◽  
Solar Thermal ◽  
Thermal Mass ◽  
Thermal System ◽  
Solar Thermal System

Thermal storage in an important operational aspect of a solar thermal system which enables it to deliver power or energy when there is no sunlight available. Current thermal storage systems in solar thermal systems work based on transferring the generated heat from sunlight to a thermal mass material in an insulated reservoir and then withdraw it during dark hours. Some common thermal mass materials are stone, concrete, water, pressurized steam, phase changing materials, and molten salts. In the current paper, a hybrid thermal energy storage system which is based on two metal hydrides is proposed for a solar thermal system. The two hydrides which are considered for this system are magnesium hydride and lanthanum nickel. Although metal hydride Energy Storage Systems (ESS) suffer from slow response time which restricts them as a practical option for frequency regulation, off peak shaving and power supply stabilization; they can still demonstrate significant flexibility and good energy capacity. These specifications make them good candidates for thermal energy storage which are applicable to any capacity of a solar thermal system just by changing the size of the ESS unit.

Thermal Behavior of Phase Change Material During Charging Inside a Finned Cylindrical Latent Heat Energy Storage System: Effects of the Arrangement and Number of Fins

2010 ◽  
Author(s):  
Dominic Groulx ◽  
Wilson Ogoh
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Latent Heat ◽  
Storage System ◽  
Heat Energy ◽  
Hot Water ◽  
Heat Of Fusion ◽  
Melting Front ◽  
Change Material

One way of storing thermal energy is through the use of latent heat energy storage systems. One such system, composed of a cylindrical container filled with paraffin wax, through which a copper pipe carrying hot water is inserted, is presented in this paper. It is shown that the physical processes encountered in the flow of water, the heat transfer by conduction and convection, and the phase change behavior of the phase change material can be modeled numerically using the finite element method. Only charging (melting) is treated in this paper. The appearance and the behavior of the melting front can be simulated by modifying the specific heat of the PCM to account for the increased amount of energy, in the form of latent heat of fusion, needed to melt the PCM over its melting temperature range. The effects of adding fins to the system are also studied, as well as the effects of the water inlet velocity.

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