Kvk corporation presents expansion engine, which is a vertical, single acting, reciprocating type of engine. This produces the cold required for the plant. These machines consist of three parts, the drive unit; the cylinder unit for air expansion; and the hydraulic system for operating the valves. High-pressure air enters through inlet valve at the start of downward stroke of the piston. An elementary factor for the function of an expansion engine is to use dry and carbon dioxide free air, as otherwise, ice and dry ice will form on valve seats, causing mal-function. The approximate temperature drop across expansion engine is 50 to 70 degrees celsius, depending on inlet air pressure, temperature and inlet cam position.
