procedures for the control of hypertension in an intermittently operated ku00fchlschaltung superkritisch

摘要

Method for controlling an intermittently supercritically operating refrigeration circuit (2) comprising a compressor (4) a heat-rejecting heat exchanger (10) and a control valve (12) and a control (16), the method comprising the following steps : (a) subcritical mode, controlling the control valve (12) so that a predetermined 'supercritical pressure' ensuring a predetermined subcooling of the liquid refrigerant at the outlet (14) of the heat-rejecting heat exchanger (10) is maintained; (b) a supercritical mode, controlling the control; valve (12) so that a predetermined 'supercritical pressure' which is optimized for optimum efficiency, of the supercritical refrigerant at the outlet (14) of the heat-rejecting heat exchanger (10) is maintained; and (c) a border mode in a region next to the critical point, controlling the control valve (12) dependent on a 'continuity pressure' which is determined on the basis of the predetermined ' subcritical pressure' and 'supercritical pressure' of steps (a) and (b).