Modulating Portable Chillers Conserve Energy, Maintain Temperature Stability
Mokon introduces the Iceman SM Series, a line of high-efficiency modulating chillers available in capacities from 5 to 15 hp. The Iceman SM Series of green-friendly portable chillers uses the Copeland Scroll Digital compressor, capable of providing variable capacity output from 10% to 100% by axially separating internal scroll members. A controlled amount of discharge gas is bypassed for a varying amount of time, resulting in a reduction of compressor output that conserves energy while maintaining temperature stability. The Copeland Scroll Digital compressor operates in two phases, a loaded phase and an unloaded phase, depending on load-demand requirements. In the loaded phase, the bypass solenoid valve is closed and the compressor operates like a standard scroll and delivers full capacity. In the unloaded phase, the bypass solenoid valve is opened, resulting in minimal or no capacity through the compressor. Reduced compression in the unloaded phase consumes significantly less energy, which leads to a reduction of compressor energy as compared to traditional portable chillers that use hot gas bypass for capacity modulation. This exact delivery of compressor capacity ensures very tight operation and control of the refrigeration circuit and compressor operation for longer compressor life and increased accuracy in process fluid delivery temperatures. Higher energy-efficiency savings can be achieved when integrated with electronic refrigeration components. Compressors are available for use with R-407C environmentally friendly refrigerants and fluid operating temperature capabilities of 20°F to 65°F (-7°C to 18°C) operation.