Low-grade thermally-driven Rankine power generation device with ejector
A low-grade heat and power generation device technology, applied in steam engine devices, machines/engines, mechanical equipment, etc., can solve the problems of low power generation efficiency and poor economy, and achieve high power generation efficiency, increased work, and stable operation.
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[0031] Example 1
[0032] Such as figure 1 As shown, a low-grade heat-driven Rankine power generation device with ejector of the present invention uses a mixture of carbon dioxide (R744 boiling point at normal pressure: -78.5°C) and acetone (boiling point at normal pressure: 56.5°C) as the working fluid. It consists of generator 1, expander 2, generator (not marked in the figure), ejector 3, absorber 4, circulating pump 5 and solution heat exchanger 6. Generator 1 is equipped with generator steam outlet and generator solution The inlet, the generator solution outlet, and the driving heat source inlet and outlet connected with the driving heat source. The ejector 3 is provided with a jet fluid inlet, a mixed liquid outlet and a working fluid inlet, and the absorber 4 is provided with a cooling coil, the cooling plate The inlet and outlet of the tube are connected with the source of the cooling medium, and the cooling medium filled in the cooling coil is water.
[0033] The steam o...
Example Embodiment
[0036] Example 2
[0037] A mixture of ammonia (R717 boiling point at normal pressure is -33.5°C) and water (boiling point at normal pressure is 100°C) is used as the working fluid. The structure of the power generation device, the connection mode of each component, and the working process are the same as those in Example 1.
[0038] This embodiment uses low-grade heat at about 120°C, the heat conversion efficiency can be increased by about 20-30%, the mechanical power consumed by the circulating pump can be reduced by about 10-25%, and the net power generation efficiency of the device can be increased by about 25-55% at the maximum. .
Example Embodiment
[0039] Example 3
[0040] Using a mixture of tetrafluoroethane (R134a boiling point -26°C under normal pressure) and tetraglyme (DME boiling point 275.3°C under normal pressure) as the working fluid, the structure of the power generation device, the connection method of each component and The working process is the same as in Example 1.
[0041] In this embodiment, low-grade heat at about 60°C is used, the heat conversion efficiency can be increased by about 20-35%, the mechanical power consumed by the circulating pump can be reduced by about 20-40%, and the net power generation efficiency of the device can be increased by about 30-70%. .
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