A heat pump-enhanced steam pressure difference energy method salt difference power generation device under positive temperature difference

Abstract

The invention provides a heat pump-enhanced steam pressure difference energy method salt difference power generation device under positive temperature difference, which includes a heat pump heating cycle device and a steam pressure difference energy method salt difference power generation device. The heat pump heating cycle device includes a condenser, a heat pump pipeline, a throttle valve, an evaporator, and a compressor; the vapor pressure difference energy method salt difference power generation device includes a low-pressure container, a high-pressure container, an expander, a differential pressure gauge, and an expander Pipeline; through the heat pump heating cycle, absorbing heat in the concentrated solution makes the temperature of the concentrated solution drop, and releasing heat in the dilute solution makes the temperature of the dilute solution rise, effectively offsetting the heat absorption of water in the dilute solution and the water vapor in the concentrated solution The inverse temperature difference generated by condensation and heat release in the middle maintains and expands the positive temperature difference, and then maintains and expands the positive saturated vapor pressure difference, which can promote the work of the expander; high energy utilization efficiency, low loss, low cost, good applicability, and processing easy 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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