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Abstract
Radiant floor heating systems (FHS) are considered as reliable heating systems since they ensure maintaining inside air temperature and reduce its fluctuations more efficiently than conventional heating systems. The presented study investigates the dynamic thermal response of an experimental FHS equipped with an anhydrite radiant slab. A new simplified model based on an analytical correlation is proposed to evaluate the heating radiant slab surface temperature and examine its thermal behavior under dynamic conditions. In order the validate the developed analytical model, an experimental scenario, under transient conditions, was performed in a monitored full-scale test cell. 2D and 3D numerical models were also developed to evaluate the accuracy of the analytical model. The method of Design of Experiments (DoE) was used to both derive meta-models, to analytically estimate the surface temperature, and perform a sensitivity study.
Highlights
Optimizing the building sector energy consumption has become a matter of extreme priority ensured through several types of enhancement measures who must consider thermal comfort conditions inside the building
Floor heating systems (FHS) has been the subject of several studies focusing on analyzing their effect on inside comfort conditions [1], determining the factors that are influencing their performance [2] as well as predicting their dynamic performance under different conditions in order to adapt a more efficient functioning mode of such systems [3].The main advantage of the floor heating systems (FHS) is their ability to maintain comfortable inside air temperature degree varying between 22-26°C for the summer season and 21-24°C for the winter season regardless of the internal loads and external climates [4]
Simplified semi-analytical models, that used a hybrid numerical-analytical method, appear more favorable than analytical or numerical approaches as they allow for a quicker evaluation of the thermal behavior of the FHS, which can help to establish optimal design parameters in the early stages of the heating system design
Summary
Optimizing the building sector energy consumption has become a matter of extreme priority ensured through several types of enhancement measures who must consider thermal comfort conditions inside the building. For commercial buildings, inside thermal comfort conditions are maintained basically through Heating, Ventilation and Air Conditioning (HVAC) systems, where their energy consumption account for more than 60% of the total consumption This high dependency on such system in order to maintain thermal comfort conditions inside a building has drawn the attention of countless research studies aiming at maximizing the efficiency of such systems while lowering the rate of electricity consumption. Simplified semi-analytical models, that used a hybrid numerical-analytical method, appear more favorable than analytical or numerical approaches as they allow for a quicker evaluation of the thermal behavior of the FHS, which can help to establish optimal design parameters in the early stages of the heating system design. The overall objective is to help designers to a better conception and optimization of such systems
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