Abstract
The aim of this paper is to present a numerical model, based on the finite difference method and able to describe the heat transfer in a room with indirect passive solar system in form of transparent insulation material (TIM) wall. Results of numerical calculations of thermal fields in TIM wall, in room with passive solar system, under climatic conditions of typical meteorological year for Poznan, are presented. Also the estimation of energy savings for selected rooms with TIM wall is given. Construction of a numerical model of building includes calculation of distribution of temperatures in all walls forming the enclosure, composition of system of energy balance equations for nodes representative of rooms and its solution. In numerical calculations of the thermal states of rooms with transparent walls, an analysis of respective components of thermal balance there has been conducted, in conjunction with required radiator heating power of automated heating installation—coacting with passive solar systems (PSS), as well as variability of η in the comparative year including months from September to April.
Highlights
Many solutions have been proposed to save energy for heating in passive solar systems (PSS)
Function of the passive solar wall is to enable solar energy collection in order to reduce energy consumption for standard heating installations. This wall stores heat during the sunny period and releases it with a time lag, which depends on the characteristics of the wall type [2]
This paper presents a numerical model of a building with the PSS, in particular, direct or indirect
Summary
Many solutions have been proposed to save energy for heating in passive solar systems (PSS). Function of the passive solar wall is to enable solar energy collection in order to reduce energy consumption for standard heating installations. This wall stores heat during the sunny period and releases it with a time lag, which depends on the characteristics of the wall type [2]. We can use solar walls for renovation of the building facade In this way we can protect the old wall and reduce the coefficient of thermal transmittance (U value), but the solar wall can give a heat gain. Transparent materials were introduced to improve the solar transmittance and thermal resistance of the wall system. Et al I JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT- 2002, Vol VIII, No 4, 286-290 parative year for Poznan city, computed using the "average year" method based on environmental data spanning ten years [13]
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