The effect of solar radiation on dynamic thermal performance of floor heating systems

Athienitis, Andreas; Chen, Y.

doi:10.1016/s0038-092x(00)00052-9

Cited by 85 publications

(24 citation statements)

References 3 publications

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“…Figure 6.53 shows a schematic of a test room for discretization of floor heating system [139]. Both the cover layer and incident solar radiation have influence on temperature distribution of the floor and thus the energy consumption as a result.…”

Section: Solar Buildingsmentioning

confidence: 99%

Waste Thermal Energy Harvesting (III): Storage with Phase Change Materials

Kong

Hng

et al. 2014

Waste Energy Harvesting

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In last two chapters, both methods to harvest waste thermal energy through the conversion to electricity. In this chapter, energy storage (ES) as an alternative method to harvest waste thermal energy, especially by using phase change materials (PCMs), will be presented.ES, as suggested by the name, is to store a certain form of energy, which thus be used later when necessary. A device that can be used to store any form of energy is generally called an accumulator. There are various forms of energy, commonly including kinetic energy, potential energy (e.g., gravitational or chemical), electrical energy, thermal energy, and so on. All these forms of energy could be stored by using an appropriate method [1,2]. For instance, mechanical energy can be stored by using hydrostorage, compressed air storage, and flywheels, while electrical energy is stored by using various batteries and supercapacitors. Thermal energy storage (TES) is the main content of this chapter.This chapter is arranged as follows. A brief description on various TES conceptions, together with a comparison, will be presented first. Among them, PCMs for TES will be emphasized. After that, PCMs with their classification according to their composition will be discussed. Design criteria, heat transfer phenomena, configuration of various PCM TES systems, which have been reported in open literature, will be summarized. Specific attention will be paid to the exergy analysis. The main applications of the PCM storage systems will be listed, analyzed, and compared. Strategies that have been used to improve the performance of such storage systems will be thoroughly evaluated. It will be ended with concluding remarks and perspectives of development of this technology.

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Section: Solar Buildingsmentioning

confidence: 99%

Waste Thermal Energy Harvesting (III): Storage with Phase Change Materials

Kong

Hng

et al. 2014

Waste Energy Harvesting

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“…A three-dimensional explicit finite differential model was employed to determine the temperature distribution for radiant floor heating with incident nonuniform solar radiation incident. It was shown that the solar energy absorption by the thermal mass of a floor heating system might contribute to a significant reduction in energy consumption [2]. The dynamics of the three-dimensional temperature field with a direct floor heater was investigated and analyzed for the transient temperature distribution [3].…”

Section: Introductionmentioning

confidence: 99%

Solar assisted conditioning of residences with floor heating and ceiling cooling: review and simulation results

Eḡri̇can¹,

Korkmaz²

2015

Int. J. Thermo

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Solar or solar assisted heating and cooling systems are becoming widespread to reduce CO2 emissions. Efficient radiant space heating and cooling systems can be used to decrease the energy bills and improve occupant thermal comfort in buildings. This study uses the TRNSYS program, for the modeling and simulation of solar assisted radiant heating and cooling of a building with the domestic hot water supply, to examine the effects of various parameters on energy consumption. Calculations are performed for a typical meteorological year (TMY) and ten attached houses in Istanbul, Turkey with hot water and chilled water storages on a six minute time step basis. Graphs showing variations of the room temperature and room relative humidity indicate satisfactory thermal comfort. Daily average COP of the absorption cooling system is improved by suitable choice of the type and size of the collectors. Sizes of the hot water and chilled water tanks are also important parameters; their roles are shown by their effect on the discarded portion of the heat from the collectors and the energy amount supplied by the auxiliary heater. It is concluded that the presented model for a solar assisted radiant heating and cooling of ten attached houses, with the domestic hot water supply, natural gas fueled auxiliary heater, hot water and chilled water storage tanks have considerable advantages; these should be maximized by optimizing the sizes of the solar collectors and storage tanks using a simulation program.

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“…Results show that, with an equivalent to 32.4 kg of PCM per square meter of the greenhouse area, temperature of inside air were found to be 6°C more at night in winter period with less fluctuations. Athienities and Chen [10] investigated the transient heat transfer in floor/PCM heating systems. Experimental and simulation results for an outdoor test room reveal that a local floor/PCM temperature is 8°C higher than that in the ordinary floor.…”

Section: Introductionmentioning

confidence: 99%

Thermal Control Of Building Using Latent Heat Storage South Wall

Faraji¹,

Alami²,

Najam³

2014

J. Math. Computer Sci.

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The aim of the present work is to study the thermal performance of a composite wall used for heating management of building. The solar energy absorbed by the wall is stored in a phase change material (PCM). The advantage of using this heating strategy is that PCMs are able to melt and absorb a high amount of diurnal solar radiations and release it to the room during the night to provide passive nocturnal heating. A one-dimensional mathematical model was developed in order to analyze and optimize the proposed latent heat storage wall. Numerical investigations were conducted in order to examine the effects of the PCM position and the PCM material properties on the thermal behavior of the proposed wall. It was found that, when the PCM layer is closer to the inner face of the wall, thermal comfort conditions are considerably improved compared to a concrete wall without PCM. The good PCM choice is satisfied when the material melts completely before the sunset and re-solidifies completely before the sunrise. Phase change materials that have a better thermal conductivity lead to a significant reduction of the building energy consumption.

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The effect of solar radiation on dynamic thermal performance of floor heating systems

Cited by 85 publications

References 3 publications

Waste Thermal Energy Harvesting (III): Storage with Phase Change Materials

Waste Thermal Energy Harvesting (III): Storage with Phase Change Materials

Solar assisted conditioning of residences with floor heating and ceiling cooling: review and simulation results

Thermal Control Of Building Using Latent Heat Storage South Wall

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