Przedstawiono wyniki ogrzewania podłoża quasi-nasyconym powietrzem. Badania wykonano w warunkach laboratoryjnych. W porównaniu z ogrzewaniem powietrzem nienasyconym uzyskano quasi- stałą wilgotność podłoża oraz wzrost jego średniej temperatury. Wyniki analizy sprawności energetycznej systemu wykazały jednak zmniejszenie sprawności wraz ze zwiększeniem strumienia wody dostarczanego do podgrzanego powietrza.
EN
Paper presented the results of heating the substrate with quasi-saturated air. The experiments were conducted under laboratory conditions. As a result of heating substrate by means of this system ( in comparison to heating with unsaturated air) the quasi - constant moisture content of the substrate as well as its average temperature rise were obtained. However the analysis of energetic efficiency of the system showed reduction of its efficiency along with increasing water flux supplied to the heated air.
In this paper a difference method of solving the system of differential equations is presented for differential equations, describing the distribution of temperature and water content in the greenhouse substrate heated with a system of heating pipes. The algorithm of solving the proposed method (explicite-implicite difference scheme) is presented. In addition, the effects of temperature and water content changes obtained from the solution of proposed the model as well as the model where the thermal diffusion of mass was included were compared.
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