Rood heat insulation and energy-saving air-conditioning of agricultural buildings

摘要

The roof comprises spaced layers 1,2 bounding an air-space I. Heat radiation 4 is directed parallel to the layers from radiating surfaces 3. The air-space may comprise water- vapour 7 emanating from water streams 5 in channel 8, and the radiant heat absorbed by the vapour increases the enthalpy of the air in the space. Water may condense as dew 10 on the layers and prevent radiation passing through the layers. The layers 1 and 2 may also be cooled by evaporation of the condensation. A warm airstream 16 from the building may be cooled, and reduced in humidity, by contact with walls 3a of the air-space. Circulating water may act in conjunction with a heat-exchanger, e.g. in the soil, to regulate the building temperature.