Phase Change Katerials For Heating And Cooling Of Residential Buildings And Other Applications

Salyer, I. O.; Sircar, A. K.

doi:10.1109/iecec.1990.716495

Cited by 39 publications

(24 citation statements)

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“…Phase change materials (PCMs), which release or absorb thermal energy during melting and solidification processes, are believed to have outstanding capability to store a massive amount of heat efficiently during their phase change processes [1,2]. PCMs have been investigated in building applications [3][4][5][6], industrial waste heat recovery [7], solar collectors [8], solar power plants [9], high-efficient compact heat sinks [10], solar cookers [11,12] and solar stills [13]. Thermal stability investigations of PCMs have been conducted through implementing repeated thermal cycle tests [14,15].…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of heat transfer in phase change materials (PCMs) embedded in porous metals

YiShui

Zhao

2011

Energy

411

124

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The effects of metal foams on heat transfer enhancement in Phase Change Materials (PCMs) are investigated. The numerical investigation is based on the two-equation non-equilibrium heat transfer model, in which the coupled heat conduction and natural convection are considered at phase transition and liquid zones. The numerical results are validated by experimental data. The main findings of the investigation are that heat conduction rate is increased significantly by using metal foams, due to their high thermal conductivities, and that natural convection is suppressed owing to the large flow resistance in metal foams. In spite of this suppression caused by metal foams, the overall heat transfer performance is improved when metal foams are embedded into PCM; this implies that the enhancement of heat conduction offsets or exceeds the natural convection loss. The results indicate that for different metal foam samples, heat transfer rate can be further increased by using metal foams with smaller porosities and bigger pore densities. Keywords:Heat transfer enhancement; PCM; Metal foam; Thermal storage; Volume-averaged method; Non-thermal-equilibrium model.

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Section: Introductionmentioning

confidence: 99%

A numerical investigation of heat transfer in phase change materials (PCMs) embedded in porous metals

YiShui

Zhao

2011

Energy

411

124

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“…-4- (Salyer and Sircar, 1990). The program objectives were to define a cost-effective, environmentally safe, solid-to-liquid PCM which melts and freezes sharply and concurrently at about 25°C and to develop methods by which the PCM could be incorporated into building materials.…”

Section: Introductionmentioning

confidence: 99%

Simplified numerical description of latent storage characteristics for phase change wallboard

Feustel¹

1995

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Cooling of residential California buildings contributes significantly to electrical consumption and peak power demand. Thermal mass can b e utilized to reduce the peak-power demand, down-size the cooling systems and/or switch to lowenergy cooling sources. Large thermal storage devices have been used in the past to overcome the short-comings of alternative cooling sources or to avoid high demand charges. With the advent of phase change material (PCM) implemented in gypsum board, plaster or other wall-covering material, thermal storage can be part of the building structure even for light-weight buildings. PCMs have two important advantages as storage media: they can offer an order-of-magnitude increase in thermal storage capacity and their discharge is almost isothermal. This allows to store large amounts of energy without significantly changing the temperature of the sheathing. A s heat storage takes place in the building part where the loads occur, rather than externally (e.g., ice or chilled water storage), additional transport energy is not needed.To numerically evaluate the latent storage performance of treated wallboard, RADCOOL, a thermal building simulation model based on the finite difference approach, will be used. RADCOOL has been developed in the SPARK environment in order to b e compatible with the new family of simulation tools being developed at Lawrence Berkeley Laboratory. A s logical statements are difficult to use in SPARK, a continuous function for the specific heat and the enthalpy had to be found. This report covers the development of a simplified description of latent storage characteristics for wallboard treated with phase change material.

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“…Two tested methods have shown promising results in eliminating the fire hazard for treated wallboards: limiting the amount of PCM to 20%, and sequentially treating the plasterboard with PCM, and with an insoluble fire retardant (Salyer and Sircar, 1990) . * ~~ ~~ ' The physical properties shown represent wallboard treated with PCM by means of postmanufacturing imbibing of liquid PCM into the pore space of the plasterboard.…”

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confidence: 99%

“…* ~~ ~~ ' The physical properties shown represent wallboard treated with PCM by means of postmanufacturing imbibing of liquid PCM into the pore space of the plasterboard. (Salyer and Sircar, 1993). …”

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Thermal performance of phase change wallboard for residential cooling application

Feustel¹,

Stetiu²

1997

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Phase Change Katerials For Heating And Cooling Of Residential Buildings And Other Applications

Cited by 39 publications

References 0 publications

A numerical investigation of heat transfer in phase change materials (PCMs) embedded in porous metals

A numerical investigation of heat transfer in phase change materials (PCMs) embedded in porous metals

Simplified numerical description of latent storage characteristics for phase change wallboard

Thermal performance of phase change wallboard for residential cooling application

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