Effectiveness of active solar space heating system in the dense housing area

Y. HIGUCHI1* and M. UDAGAWA2

1Visiting researchers of Kogakuin University. 1-24-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo, 163-8677

higuchi. yoshiki@kurashi-desgin. jp
2Dept. Architecture, Faculty of Engineering, Kogakuin Univ.

1-24-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo, 163-8677
udagawa@cc. kogakuin. ac. jp.

Abstract

The effect of the passive solar heating of a single family house built in the dense housing area was examined using the simulation program EESLISMver6. The EESLISMver6 is extended version of a generalized building energy and environment simulation tool EESLISM which has been developed by the authors. EESLISMver6 can take into consideration the shadow effects of trees and adjacent buildings. Daily total incident solar radiation for the house in city areas was decreased by 90% or more compared with the house without adjacent buildings, so that, heating load increased by 1.5 times against the base case. Therefore, the active solar heating system is expected for the low-rise house in the dense housing to compensate the decreased passive solar effect.

In this study, the total effect of solar space heating with active and passive ways are examined using the detailed system simulation. The simulation results show that active solar space heating system is especially effective in the dense housing area as expected in this study.

Keywords: solar space heating, adjacent building, heat load, simulation

1. Introduction

When considering the energy saving of residential houses, it is effective to use the solar radiation from windows for passive heating in winter. When a site for single family house is narrow, the enough incident solar radiation from the windows can not be expected due to the shadow by adjacent buildings, trees, etc. Moreover, curtain is generally closed in the daytime for privacy. Therefore, in order to realize energy saving and a comfortable life, use of active solar space heating is especially important for a house built in the dense housing area. It is because the interior of a room can be heated if there is even an incident solar radiation to a roof even when there is little incident solar radiation on windows.

In this study, the total effect of solar space heating with active and passive ways are examined using the detailed system simulation with a generalized simulation tool EESLISM ver6 [1] which can take into consideration the shadow effects of trees and adjacent buildings developed by the authors[2-4].