Two applications of a numerical approach of heat transfer process within rock beds

Coutier, J.Pascal; Farber, E. A.

doi:10.1016/0038-092x(82)90053-6

Cited by 156 publications

(38 citation statements)

References 8 publications

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“…The storage purpose is twofold: to increase the value of the power generated by strongly reducing its randomness and to improve the plant economics by using the available hardware for more hours a year. Recent concentrating solar plant projects incorporate heat storage that allows the system to operate for some [6][7][8][9][10][11][12] hours in the absence of solar irradiance [5].…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of sensible thermal energy storage in high temperature solar systems

Andreozzi¹,

Bianco²,

Manca³

et al. 2009

WIT Transactions on Modelling and Simulation

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A study on sensible thermal energy storage (TES) for high temperature solar systems is numerically accomplished. The high temperature TES is cylindrical, the fluid and the solid thermo-physical properties are temperature independent and the radiation heat transfer mechanism is neglected. A parametric analysis is carried out. The commercial CFD Fluent code is used to solve the governing equations in the transient regime. Numerical simulations are carried out at different mass velocity values of the heat-carrying fluid and porosity of the storage medium. The results show the effects of the porosity and of the working fluid mass velocity on the stored thermal energy and on the storage time.

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Section: Introductionmentioning

confidence: 99%

“…Each medium has its own advantages and disadvantages. Packed bed generally represents the most suitable energy storage unit for air based solar energy systems as mentioned in [8]. An extensive literature review of research work was presented in [9,10] and, more recently, in [11,12].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of sensible thermal energy storage in high temperature solar systems

Andreozzi¹,

Bianco²,

Manca³

et al. 2009

WIT Transactions on Modelling and Simulation

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“…Solar cells or solar greenhouse domes have sometimes been used to collect thermal energy. It is then transferred by using a system of fans and tubing to rock fills [3][4][5][6][7] . The advantage of this technology is that the sun is the main source of energy and the rocks are relatively inexpensive, readily available in many areas, longlasting, and safe.…”

Section: Introductionmentioning

confidence: 99%

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Phueakphum¹,

Fuenkajorn²

2010

ScienceAsia

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The efficiency of a solar thermal energy storage system using basaltic rock fills has been assessed using a scaled-down model. The proposed system is designed to operate without external electricity in cold areas. Solar energy is collected and stored in basalt ballasts filled in a shallow pit excavated above the groundwater table. The surrounding soil and an acrylic sheet cover serve as insulator. The stored thermal energy is released through a system of tubes to warm up housing at night. The thermal properties of ten rock types that occur widely in the north and northeast of Thailand were determined in the laboratory. A scaled-down model, simulating the storage system and housing, was constructed to monitor the temperature changes of the various system components and the results were compared with the predictions of mathematical models. Buriram basalt was selected for testing as it has the highest thermal conductivity and specific heat. The results indicate that throughout the night the system can increase the housing temperature to 4-6°C more than the surroundings, depending on the packing density, tube size, and surrounding temperature. The efficiency of this storage system is about 35%. The gained heat energy in the housing is equivalent to the electrical energy of 203 kJ. The mathematical models developed here agree well with the measured results.

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“…Therefore, Cautier and Farber [22] stated that Schumann model can not be applied, when dealing with solar applications, because actual conditions are too restrictive for Schumann's mathematical treatment. Authors presented a two-phase model, which includes effect of thermal losses, air capacitance and conduction between material elements.…”

Section: Cautier and Farber Modelmentioning

confidence: 99%

Models for Predicting Thermal Performance of Packed Bed Energy Storage System for Solar Air Heaters – A Review

Singh¹,

Saini²,

Saini³

2009

TOEFJ

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Packed bed is generally recommended for attaching with solar air heater in order to store thermal energy of hot air. For designing such a system under the given system and operating parameters, it is required to predict performance of the system by using mathematical models. In the present paper an attempt has been made to discuss mathematical models reported in the literature for predicting thermal performance of packed bed energy storage system for solar air heaters. The designer may be benefited from the consolidated information reported in the present paper.

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Two applications of a numerical approach of heat transfer process within rock beds

Cited by 156 publications

References 8 publications

Numerical investigation of sensible thermal energy storage in high temperature solar systems

Numerical investigation of sensible thermal energy storage in high temperature solar systems

Untitled

Models for Predicting Thermal Performance of Packed Bed Energy Storage System for Solar Air Heaters – A Review

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