Solar photovoltaic waste heat-joule heat gradient utilization seawater desalination system

Abstract

The invention discloses a solar photovoltaic waste heat-joule heat gradient utilization seawater desalination system, and belongs to the field of renewable energy source utilization. The system mainlycomprises a high-transmittance glass cover plate, a solar photovoltaic cell, heat conduction silica gel, a heat conduction aluminum plate, a seawater flow channel, an electric heating layer, a hydrophobic film layer, a condensate flow channel, aheat preservation and insulation layer a seawater storage tank, a condensate collecting tank, a washing tank and an efficient fin radiator. The system iscomposed of multiple layers of seawater desalination devices. The desalination devicesare arranged in the heat preservation and insulation layer, the high-transmittance glass cover plate, the solar photovoltaic cell, the heat conduction silica gel, the heat conduction aluminum plate, the electric heating layer, the hydrophobic film layer, the seawater flow channel, the seawater storage tank and the condensed water collection tank are sequentially arranged in the heat preservation and insulation layer from top to bottom. Waste heat and electric energy generated by power generation of the solarphotovoltaic cell are utilized, energy is utilized in situ or in a gradient mode to participate in sea water desalination, solar energy is utilized to the maximum extent, and meanwhile the evaporationefficiency and the sea water desalination capacity of the system are greatly improved.

Description

technical field [0001] The invention belongs to the field of renewable energy, and particularly relates to a seawater desalination system for cascaded utilization of solar photovoltaic waste heat-Joule heat, in particular to a multi-stage evaporative heat-permeable membrane seawater desalination system for all-solar-driven photovoltaic waste heat-Joule heat cascade utilization system. Background technique [0002] Water and energy are inseparable. With the development of society, water security has become one of the important factors affecting energy security. On the one hand, the energy industry, as a large industrial water user in my country, accounts for more than 40% of water consumption. The importance of water resources to the energy industry is self-evident; on the other hand, the current clean water treatment technology, especially the traditional seawater desalination The technology consumes high energy, and the discharge of concentrated wastewater seriously pollute...

AI Technical Summary

Problems solved by technology

However, since thermal energy is a low-grade energy source, the entropy of the energy transfer process increases and the efficiency decreases step by step. Therefore, this will result in a small temperature difference between the two sides of the bottom film, insufficient driving force, and low evaporation efficiency, which will make the improvement of the overall system performance relatively limited.

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