EXPANDER-GENERATOR UNIT Russian patent published in 2014 - IPC F25B11/02 F25B49/02 

FIELD: heating.

SUBSTANCE: invention relates to an expander-generator units. The expander-generator unit comprises a first stage of the expander to drive an electric generator, the second stage of the expander to drive the compressor, the heat exchanger, the throttle, the evaporator, gas pipelines of high and low pressure, the first, the second and bypass adjustment and shut-off electrically driven valves, the pump with frequency-variable drive to supply low-grade coolant to the evaporator, the control unit, the temperature and pressure sensors. The compressor is connected to the output of the evaporator. The input of the evaporator through the throttle is connected to the output of the heat exchanger. The input of the heat exchanger is connected to the compressor output. The output of the first stage of the expander through the first valve is connected to the low pressure gas pipeline. The output of the second stage of the expander is connected to the input of first stage of the expander. The input of the second stage of the expander through the second valve is connected to the high pressure gas pipeline. The control unit comprises an application software program package and is made with the ability to influence the degree of opening of the bypass, the first and second valves, as well as with the ability to control the speed of rotation of the electric motor of the pump drive.

EFFECT: invention is aimed at maintaining the optimum temperature and the required pressure of the fuel gas prior to the burners depending on the performance of the boiler and the temperature of the low-grade coolant.

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