Pneumatic solar collector systems have a certain advantage of conversion efficiency of 40% to 60% and less long-term failure compared with liquid types. However, according to previous studies, pneumatic solar heating systems require large power input for air supplying and sometimes provide overheating and overdrying.
In this paper, utilizing a heat collecting panel working as an auxiliary heating facility, which is consist of simple devices and requires no power source, a prediction method of heat collection effect especially for energy saving design of houses is shown. Experimentally the panel's basic performance is clarified and a simplified separation method of normal direct solar radiation and horizontal sky solar radiation for predicting the heat collection amount in various places in Japan by using the total solar insolation of the AMeDAS meteorological data is also shown. The calculation results of heat collection amount obtained by the present works' separation method is evaluated by comparing to experimental results and the other separation method given by previous studies and concluded its practicality. Moreover, heat collection amounts of the representative area in Japan are shown.
The followings are the results and findings of this study.
1) Asimplified formula of heat collection amount prediction of the solar heating system, which is validated by experimental result, is proposed.
2) A unique separation model of normal direct solar radiation and horizontal sky solar radiation is shown and concluded its practicality by comparing to the Nagata Model and Perez Model.
3) Using an experimental equipment, the reproducibility of calculated supply heat quantity using present work's method is confirmed.
4) Using the wall mounted solar heating panel installed in a real residence in Chitose City Hokkaido, the predicted heat collection amount and actual measured value are compared and conclude that, they are in good agreement and can be calculated with practically sufficient accuracy.
5) By using proposed model, heat collection amounts in 18 cities in Japan are calculated and the results show the annual heat collection is approximately 420 to 650 kWh in the heating period can be expected in each city.
