Kalina circulating system with two-phase expansion machine
A circulation system and expander technology, which is applied in mechanical equipment, steam engine devices, machines/engines, etc., can solve the problems of reducing the liquid working medium at the outlet of the separator, energy waste, etc., achieve strong energy saving effects, improve efficiency, and operate reliably Effect
Inactive Publication Date: 2013-09-18
CHONGQING UNIV
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Problems solved by technology
However, in the Kalina cycle system, the throttling valve is used to reduce the pressure of the liquid working medium at the outlet of the separator, which causes a huge waste of energy due to throttling loss
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Embodiment 1
[0032] Embodiment 1: take ammonia water mixture as working medium, to the present invention figure 1 The performance of the shown device and a conventional Kalina cycle system were simulated and calculated. Given the inlet and outlet temperature and flow rate of the low-grade heat source in the simulation, it is assumed that the cooling water inlet temperature is 290K and the flow rate is 1kg / s; the heat transfer end difference of the condenser is 5K; the logarithmic heat transfer temperature difference of the evaporator is 30K; The efficiency of the expander and the two-phase screw expander are 80% and 75%, respectively; the efficiency of the pump is 80%. The present invention compares 4 kinds of evaporation pressures figure 1 The performance of the device shown and the traditional Kalina circulation system, the selected evaporation pressure is 1.5MPa, 2.0MPa, 2.5MPa, 3.0MPa respectively.
[0033] Tables 1 to 4 are respectively the performance comparison between the device ...
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The invention discloses a Kalina circulating system with a two-phase expansion machine, which includes a heating device, a separating device, expansion machines, a generation device, an absorption and cooling device, and a boosting device, wherein the heating device includes an evaporator and a regenerator; ammonia water mixing working medium is heated, boiled and vaporized in the regenerator and the evaporator, and enters the separating device through a connecting pipeline; the separating device includes a separator; gas state working medium with higher ammonia concentration and liquid working medium with lower ammonia concentration are separated from the ammonia water mixing working medium; the expansion machines and the generation device include a two-phase screw expansion machine, a turbo expansion machine and a generator; the gas state working medium and the liquid working medium enter the turbo expansion machine and the two-phase screw expansion machine respectively to drive the generator to generate electricity; the absorption and cooling device includes an absorber and a condenser; the boosting device includes a pump. The system utilizes waste heat, solar energy and other low-grade energy sources during industrial production, recycles the throttling expansion work, and is an effective method for improving the energy use efficiency.
Description
technical field [0001] The invention relates to the technical field of low-grade energy utilization, in particular to a Kalina circulation system with a two-phase expander. Background technique [0002] In petroleum, chemical industry, light industry, metallurgy, cement, automobile and other industries, there is a large amount of medium and low temperature waste heat. Tens of thousands of boilers, kilns, hot blast stoves, and condensing equipment discharge a large amount of medium and low temperature flue gas and waste water to In the environment, a large amount of heat energy is taken away, which not only causes a huge waste of energy, but also causes serious environmental thermal pollution. The recovery and utilization of these waste heat can improve the utilization efficiency of primary energy on the one hand, and reduce thermal pollution caused by waste heat to the environment on the other hand. In addition, there are abundant other forms of low-grade heat sources in my...
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IPC IPC(8): F01K27/00F01K25/08F01K23/02
Inventor 刘朝何嘉诚徐肖肖贺超解辉吴双应李友荣
Owner CHONGQING UNIV