Anytime you’re in the position of choosing a heating or cooling system, you have to make decisions. One that comes up with ground source heat pumps is deciding between the open-loop vs. closed-loop types for the outdoor heat source or sink. The diagram above shows four closed-loop sys...
FIG. 1 is a simplified flow diagram of a cascaded refrigeration process for LNG production which employs a semi-closed loop methane refrigeration cycle; and FIG. 2 is a flow diagram providing greater detail regarding the system for controlling the amount of predominately methane refrigerant introduce...