THE EXPERIMENTAL STUDIES OF A BIOTHERMAL INSTALLATION FOR CALF HOUSE FLOOR’S HEATING RESULTS

Abstract

Farm animal manure is one of renewable energy resources types that the selfheating at humus process’s property has had. It allocates bioheat suitable for use (heating water for animals watering and cows' udders washing, livestock premises floor heating, etc.). The authors have developed and tested a biothermal installation to increase the efficiency at bioheat released during manure selfheating’s using. The biothermal installation with temperature sensors at the inlet is equipped, as well as at the installation outlet and in the manure mass, at characteristic’s points directly. The active selfheating period is 40-42 days from the start date. Studies have established the average selfheating temperature of the manure mass (3000-3100 kg - a mixture of horse and sheep manure in a ratio of 1:1, humidity 70-75%) for this period, which is 57.9 ± 5.67 °C at a variation’s coefficient of 9,8% with an air temperature fluctuation of 17°C...-2°C. Fluctuation of air temperature does not significantly affect the process of manure mass selfheating. At subzero ambient temperature, the manure selfheating with a slight slowdown continuing . In the steadystate operation mode, the average water temperature at the biothermal installation’s entrance and at the exit from it, is respectively, 44.9 °C and 54.9 °C. This biothermal installation’s average heating capacity and thermal power are 50-53 kJ/kg and 320-325 watts.