A solar energy cooling and power cogeneration system and method with heat collection cooling and solar thermal storage

Abstract

The invention discloses a solar combined cooling and power generation system and method with heat collection cooling and photo-thermal cold accumulation functions. A solar module is interactively connected with a heat storage water tank, a heat collection cooling tank, a first hot water pump and a third hot water pump; the heat storage water tank is sequentially connected with a second hot water pump and an absorption-type refrigerator; the absorption-type refrigerator is sequentially connected with a cold storage water tank and a first chilled water pump; the cold storage water tank is sequentially connected with a supercooling water pump and a subcooler; the subcooler is sequentially connected with a throttle valve, an evaporator, a compressor and a condenser; the evaporator is sequentially connected with a second chilled water pump and a cold supply terminal; and the solar module is sequentially connected with a power storage device and a power utilization terminal. According to thesystem, the a heat collection cooling tank is adopted, so that temperature of hot water in a strong radiation period is reduced at the absence of external cold sources, and therefore, photovoltaic efficiency is remarkably improved; the sustainable work of the heat collection cooling tank is realized by utilizing the temperature difference of the water tanks; and photovoltaic and photo-thermal properties can be synergistically improved through photo-thermal cold accumulation and cold release during the peak time of electricity prices.

Description

technical field [0001] The invention relates to a refrigeration system, in particular to a solar cooling and power cogeneration system and method for heat collection cooling and photothermal cold storage. Background technique [0002] With the rapid development of social economy and the steady improvement of people's living standards, the total energy consumption has shown a rapid increase. Therefore, realizing the transition from the fossil energy system to a low-carbon energy system and finally entering the era of sustainable energy dominated by renewable energy is the basic trend of energy transformation. [0003] Due to the advantages of huge solar energy resources, convenient installation, low transmission and distribution loss and high reliability, distributed photovoltaic systems have attracted much attention and developed rapidly. Although the distributed photovoltaic system has excellent development potential, the high cost of power generation has become the main b...

AI Technical Summary

Problems solved by technology

In engineering applications, since the temperature of the photovoltaic cells of the photovoltaic-thermal integrated collector increases significantly with the rise of solar radiation (when the solar radiation reaches 700W / m 2 The temperature of the photovoltaic cell will be close to 85°C), which will lead to a significant attenuation of photovoltaic power generation

[0006] In addition, nearly 45% of the solar-thermal cooling capacity is applied to the electricity price flat period (such as 8:00 to 14:00 in a certain area) and fails to realize the maximum utilization of the energy-saving value of photovoltaic waste heat cooling

Although the technical solution of collecting and storing photovoltaic waste heat during the electricity price flat period by adopting thermal storage, and then supplying cooling during the peak electricity price period can improve the energy-saving benefits of solar-thermal cooling capacity, however, due to thermal storage, it will greatly increase the photovoltaic thermal integrated collector Therefore, the photovoltaic power generation will be greatly reduced and completely offset the gain effect of photovoltaic waste heat cooling energy saving value

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