Electricity-water coproduction method combining solar power generation and sea water desalination

A combined, solar energy technology, applied in the field of solar energy utilization, to achieve the effect of lowest cost, high technical benefit and economic value

Inactive Publication Date: 2013-03-13
沈兴财
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although low-temperature multiple-effect distillation seawater desalination technology has been widely used, the technology of combining low-temper

Method used

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  • Electricity-water coproduction method combining solar power generation and sea water desalination

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Embodiment 1

[0022] Embodiment 1 of the present invention: trough solar power generation combined with low-temperature multi-effect distillation seawater desalination method for cogeneration of electricity and water: by trough solar collectors and heat accumulators (used for temporary storage of tank solar collectors) The trough solar heat collection system 1 composed of accumulated excess heat energy) converts the solar radiation energy into heat energy of the heat transfer medium (heat transfer oil). The temperature of the heat transfer oil after absorbing the solar radiation energy is 400°C. and low-pressure steam generator 7 to transfer energy to high-pressure steam and low-pressure steam respectively. After passing through high-pressure steam generator 3, the temperature of heat-conducting oil drops to 300°C, and after passing through low-pressure steam generator 7, the temperature of heat-conducting oil drops to 120°C; pressure 120bar Part of the energy of the high-pressure steam at a...

Embodiment 2

[0023] Embodiment 2 of the present invention: the electricity-water cogeneration method that tower type solar power generation is combined with low-temperature multi-effect distillation seawater desalination: by tower type solar heat collector and accumulator (for temporarily storing tower type solar heat collector The tower-type solar heat collection system 1 composed of accumulated excess heat energy) converts the solar radiation energy into heat energy of the heat-carrying medium (molten salt). The temperature of the molten salt after absorbing the solar radiation energy is 550°C. and low-pressure steam generator 7 to transfer energy to high-pressure steam and low-pressure steam respectively. After passing through high-pressure steam generator 3, the temperature of molten salt drops to 330°C, and after passing through low-pressure steam generator 7, the temperature of molten salt drops to 250°C; pressure 90bar Part of the energy of the high-pressure steam at a temperature of...

Embodiment 3

[0024] Embodiment 3: Combined electricity and water cogeneration method of solar power generation and seawater desalination: solar heat collection system 1 converts solar radiation energy into heat energy of heat-carrying medium (heat-conducting oil or molten salt), heat-carrying medium after absorbing solar radiation energy The temperature is 450°C. The heat-carrying medium transfers energy to the high-pressure steam and the low-pressure steam in the high-pressure steam generator 3 and the low-pressure steam generator 7 respectively. After passing through the high-pressure steam generator 3, the temperature of the heat-carrying medium drops to 330°C. After the steam generator 7, the temperature of the heat-carrying medium drops to 160°C; part of the energy of the high-pressure steam with a pressure of 60bar and a temperature of 320°C is converted into electrical energy through the steam power generation system 2; the pressure of the steam from the steam power generation system ...

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Abstract

The invention discloses an electricity-water coproduction method combining solar power generation and sea water desalination, and the method is characterized in that a solar heat collection system is used for converting the solar radiation energy to the heat energy of a heating agent, and the heating agent respectively transfers the energy to the high-pressure vapor and the low-pressure vapor inside a vapor generator; partial energy of the high-pressure vapor is converted to the electric energy through a vapor power generation system; the low-pressure vapor injects partial vapor in a low-temperature multi-effect distillation desalination device and collectively enters the low-temperature multi-effect distillation desalination device to be used as driving heat source to produce the fresh water; and after exchanging the heat through the vapor generator, the heating agent is supercharged by a heating agent pump to enter a solar heat collection system so as to absorb the solar radiation energy. The residual heat after the solar power generation is further utilized for desalting the sea water, so that not only is the solar radiation heat high efficiently utilized, but also the temperature of the heating agent returned to the heat collection system is reduced, and the heat collection efficiency is improved. Meanwhile, the electricity-water coproduction is realized, and high technical benefit and economic benefit can be realized.

Description

technical field [0001] The invention relates to an electricity-water cogeneration method combining solar power generation and seawater desalination, and belongs to the technical field of solar energy utilization. Background technique [0002] Solar power generation in the prior art mainly adopts the following two forms: [0003] 1. Trough-type line-focused solar power generation system: the current main obstacle of this system is that the temperature of the heat-collecting working medium is not high, and the thermal efficiency of the power subsystem is low; The heat collection efficiency of the subsystem is low. When the heat collection temperature of the system is higher than 400 °C, the vacuum degree of the solar collector is difficult to guarantee, the service life is rapidly reduced, and the heat collection efficiency is also dropped sharply. For example, when the direct solar radiation intensity is 800W / m 2 , when the temperature is 500°C, the heat collection efficie...

Claims

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Application Information

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IPC IPC(8): F03G6/06C02F1/14C02F103/08
CPCY02E10/46Y02A20/124Y02A20/142Y02A20/212Y02W10/37
Inventor 沈兴财
Owner 沈兴财
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