cylindrical drying chamber made of steel sheet with a diameter of 1m and a length of 1.2 m, a 5.2kW heatpump to supply heat to the drying chamber, a 1.2kW liquid ring vacuum pump to control the drying pressure in the drying chamber, a 100W service liquid pump to circulate cooling water to the vacuum pump, a 100Wcoolingwater pump to circulate chilledwater to the dehumidifier for reducing humidity in the drying chamber, a 0.2m×0.2m×0.3mcondensate collector to collect condensed water from the dehumidifier and a 1m×2m×0.3m cooling water tank to supply the cooling water produced by the evaporator of the heat pump, to the dehumidifier and the vacuum pump