Abstract
The objective of this work is to study the thermal behavior of a solar heating system using an active layer, integrated in a wall and supplied with hot water by a parabolic trough solar collector (PTC). The prototype includes a PTC collector with a surface area of 1.8m2, a tank and an active layer integrated in a wall. A complete simulation model using the TRNSYS 16 simulation software has been established. Simulation tests under the climatic conditions of the city of Errachidia located in southeastern Morocco show the temperature variations in the different components of the installation as well as the useful energy gained during the three coldest months (December, January and February). In addition, an evaluation study of the system's performance with effect of different values of the reflectivity of PTC collector mirror was carried out. The results obtained show that the PTC efficiency increased from 0.41 to 0.63 when the reflectivity of the collector mirror increased from 0.6 to 0.9 for the three heating months.
Highlights
The exploitation of solar energy in the building sector is experiencing increasing demand due to low operating costs and government support for the deployment of renewable energy
A solar heating system composed of a parabolic trough solar collector (PTC), an absorption heat pump and an oil/water heat exchanger has been the subject of a performance analysis performed by Fan et al [2]
We have noticed that the effective energy gain of the PTC and the heat exchanged between the exchanger and the storage tank differ from month to month
Summary
The exploitation of solar energy in the building sector is experiencing increasing demand due to low operating costs and government support for the deployment of renewable energy. The current researches on thermal behavior and performance of solar heating systems were based on experimental and simulation studies. In this context, Mehdaoui et al [1] presented an optimal dimensioning of active layer solar heating system integrated in the floor and in the wall. Sobhansarbandi et al [7] investigated the possibility of using compound parabolic concentration (CPC) solar collectors instead of planar collectors (FPCs) to explore the feasibility of reducing the surface area required by the collectors Their system is composed of solar thermal collectors, a storage tank and water circulation to transport heat to four similar floor slabs.
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