| 主权项 |
1. A fluid heating and/or cooling system arranged to heat and/or cool a fluid and comprising:
a heat pump comprising a compressor, an evaporator having an evaporating temperature at which refrigerant therein evaporates and a condenser having a condensing temperature at which refrigerant therein condenses, connected by a refrigerant pipe-work system arranged to carry a refrigerant; wherein one of the condenser and the evaporator provides a heat exchanger between the fluid and the refrigerant; the heat exchanger having:
(i) a primary inlet arranged, in use, to receive the refrigerant;(ii) a secondary inlet arranged, in use, to receive the fluid; and(iii) a secondary outlet arranged, in use, to output the fluid; a fluid storage vessel arranged, in use, to allow fluid therefrom to be circulated through the heat exchanger via the secondary inlet, in a heating pipe-work system; at least one temperature sensor arranged to monitor a temperature of the fluid and to generate a temperature output; and a system controller arranged to have input thereto the at least one temperature output and to generate a reference temperature from the at least one temperature input thereto, wherein the reference temperature is a function of the temperature of at least one of a secondary inlet and outlet of the heat exchanger and the controller is further arranged to control a temperature of the primary side of the heat exchanger in response to the reference temperature such that the temperature of the primary side of the heat exchanger is maintained substantially at a determined temperature interval from the reference temperature. |
