Heat pump-reinforced salt-concentration-differential electricity generation device by vapor differential pressure energy method under positive temperature difference

Abstract

The invention provides a heat pump-reinforced salt-concentration-differential electricity generation device by a vapor differential pressure energy method under positive temperature difference. The electricity generation device comprises a heat pump heating circulating device and a salt-concentration-differential electricity generation device by the vapor differential pressure energy method. The heat pump heating circulating device comprises a condenser, a heat pump pipeline, a throttle valve, an evaporator and a compressor; the salt-concentration-differential electricity generation device by the vapor differential pressure energy method comprises a low-pressure container, a high-pressure container, an expander, a differential pressure gauge and an expander pipeline; by heat pump heating circulating, heat in a concentrated solution is absorbed so as to lower the temperature of the concentrated solution, the heat is released in a dilute solution so as to increase the temperature of the dilute solution, so that temperature inversion difference generated by heat absorption through evaporation of water in the dilute solution and heat release through condensation of vapor in the concentrated solution is effectively offset, the positive temperature difference is maintained and enlarged, further positive saturated vapor differential pressure is maintained and enlarged, and the expander is promoted to do work; the energy utilization efficiency is high; the loss is small; the cost is cheap; the applicability is good; the machining is simple and convenient.

Description

technical field [0001] The invention relates to the field of salt difference power generation, in particular to a heat pump enhanced steam pressure difference energy method salt difference power generation device under positive temperature difference. Background technique [0002] With the progress of society and the rapid development of the world economy, people's demand for energy is increasing day by day. Judging from the current development of world energy, fossil energy will still occupy the main position for a long time in the future, but fossil energy as A non-renewable energy is also facing a series of problems such as depletion and environmental pollution, which urgently requires us to find new energy to replace fossil energy. The ocean is an inexhaustible treasure house, which contains abundant ocean energy resources. Ocean energy resources usually refer to the renewable natural energy contained in the ocean, and seawater salinity difference energy is the most impo...

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Problems solved by technology

The biggest advantage of this method is that it avoids the dependence on the permeable membrane, but due to the low temperature, less evaporation, and too small pressure difference, the vapor pressure difference between seawater with a concentration of 3.45% and fresh water at room temperature is only 10-20mmHg Therefore, the diameter of the turbine needs to be very large to ensure sufficient power generation, and the temperature on the upper surface of the dilute solution side will gradually decrease due to the evaporation of water, and when the water reaches the upper surface of the concentrated solution side, Due to the heat released by condensation, the temperature rises, gradually forming a reverse temperature difference, which hinders the positive pressure difference. If the temperature rise of the concentrated solution is 0.5°C due to the condensation of water vapor, the pressure difference will be offset, so the vapor pressure difference can be used as a salt Poor power generation is difficult to utilize

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