PROTOTYPING HEAT RECOVERY SYSTEM FOR VACUUM MACHINES
At low subzero temperatures on the territories of the Russian North have difficulties with the operation of municipal vehicles, especially vacuum sewage truck. In the absence of a central sewage system, as well as the arrangement of growth emerged suburban areas, the number of machines for cleaning cesspools tends to a constant increase. Due to the fact that during the operation of machines cesspool occurs temperature difference between the liquid waste in the tank (positive temperature) and ambient air (negative temperature), resulting in the formation of condensate. At negative temperatures (below minus 20?°C) condensate freezes. This leads to the rejection signaling safety valve device and contributes to a thinner air inside the tank during its subsequent cooling and crushing atmospheric pressure. For example, sewage truck KO-505A is designed and tested system of warm-valves. It determines the cost of its production, and the effect of using valves warming system.