초록 ▼

In a system having a waste heat recovery subsystem utilizing a heat exchanger, such as a refrigeration system having a heat exchanger for extracting and recovering heat energy from the superheated refrigerant by means of a transfer fluid, method and apparatus for control of the heat recovery subsyst

In a system having a waste heat recovery subsystem utilizing a heat exchanger, such as a refrigeration system having a heat exchanger for extracting and recovering heat energy from the superheated refrigerant by means of a transfer fluid, method and apparatus for control of the heat recovery subsystem. A combination of three interactive control systems is provided for control of the flow of the heat transfer fluid through the heat exchanger. A first heat sensor means determines when the waste heat temperature is sufficiently high, controlling a pump to obtain circulation of the fluid when such temperature exceeds a preselected value. A second heat sensor means monitors the temperature of the heat transfer fluid and stops circulation of the fluid when such temperature exceeds a preselected safe upper limit. The second heat sensor means also controls the pump to circulate hot fluid through the heat exchanger when no waste heat is available and the subsystem is exposed to potentially freezing ambient temperature. Third heat sensor means monitors the transfer fluid temperature at the outlet of the heat exchanger and controls the rate of flow of the fluid in a manner proportional to such temperature.

대표청구항 ▼

In a system having a subsystem for recovery of waste heat from a medium utilizing a heat exchanger and a transfer fluid, and having a pump for circulation of the transfer fluid, the method of control of the subsystem comprising the steps of: pumping the transfer fluid through the heat exchanger; sen

In a system having a subsystem for recovery of waste heat from a medium utilizing a heat exchanger and a transfer fluid, and having a pump for circulation of the transfer fluid, the method of control of the subsystem comprising the steps of: pumping the transfer fluid through the heat exchanger; sensing the temperature of the transfer fluid after exiting the heat exchanger in a manner proportional to such sensed temperature; sensing the waste heat medium temperature at the input of the heat exchanger; and maintaining a minimun rate of flow of the transfer fluid through a heat exchanger without regard to such outlet temperature when the waste heat medium temperature is greater than a first pre-selected value.