Evaluation of a liquid radiation filter greenhouse in a desert environment Academic Article uri icon


  • A 330 m2 liquid radiation filter greenhouse (LRFG) has been designed, built, and tested under summer and winter desert conditions. The greenhouse was constructed of hollow polycarbonate cladding through which a liquid radiation filter (LRF) was circulated. The LRF absorbed most of the incident near infrared part of the solar radiation while transmitting most of the photosynthetically active radiation. In the cold season, the absorbed energy was transferred via a heat exchanger to a water tank. At night, the heat was returned to the greenhouse via the heat exchanger by circulating the LRF through the cladding. In summer, surplus absorbed energy was rejected to the environment by means of a cooling tower. The greenhouse remained almost closed at all times except for several hours at midday in summer. This enabled long periods of carbon dioxide (CO2) fertilization. During these …

publication date

  • January 1, 1998