Analysis of Thermal and Light Properties of Greenhouse Considering Greenhouse Sheets Characteristics in Hot and Humid Area in Asia

Abstract

Food market in Asia is expanding at dramatic rate. In the near future, there will be about 400 million rich people who will eat raw vegetables as well as Japanese people, which is a great business opportunity for the farmer in Japan who has the know-how to produce high-quality vegetables. However, the weather conditions in Asia, especially in south-east Asia, can induce poor growth of plants because of its distinctive high temperature and humidity. In this case, putting a light shielding material on the outside of film can be a good method for cooling the greenhouse. In this study, the authors investigated the effects of some greenhouse shielding sheets on the environment of greenhouse in hot and humid regions of Asia. Consequently, it became possible to analyze the degree of suppression of the temperature rise of the greenhouse due to absorption of heat rays using shielding materials for the greenhouse at high temperature and its mechanism. It was suggested that focusing on the physical value of the film such as absorption rate is important by this simulation.