A low-grade solar combined cooling, heating and power supply system and its operating method

Abstract

The invention discloses a low-grade solar combined cooling heating and power supply system. A solar photovoltaic photo-thermal assembly comprises a photovoltaic panel located on the front surface anda heat collector located on the back surface. The photovoltaic panel is used for solar power generation. The heat collector is connected with a first hot water pump and a heat storage water tank. Theheat storage water tank is connected with a third hot water pump and a heat supply terminal. The heat storage water tank is connected with a second hot water pump and an absorption type refrigerationunit. The absorption type refrigeration unit is connected with a first chilled water pump and one side of a subcooler. The other side of the subcooler is connected with a throttling valve, an evaporator, a compressor and a condenser. The evaporator is connected with a second chilled water pump and a cold supply terminal. A first controller is connected with the first hot water pump, a first temperature sensor and a second temperature sensor. A second controller is connected with the second hot water pump, a third temperature sensor, an absorption subsystem, the first chilled water pump and thethird hot water pump. The low-grade solar combined cooling heating and power supply system can carry out combined cooling heating and power supply when the temperature of a back plate of the photovoltaic panel is as low as 70 DEG C, and the economical benefits of the system are greatly increased.

Description

technical field [0001] The invention relates to a solar heat exchange system, in particular to a low-grade solar combined cooling, heating and power supply system and its operating method. Background technique [0002] With the rapid development of social economy and the gradual improvement of people's living standards, the energy consumption of modern metropolises is very huge. Since most of the consumed energy comes from the electricity generated by burning coal in thermal power plants, this leads to a significant increase in carbon dioxide emissions, which seriously affects energy conservation and emission reduction and the sustainable development of society. [0003] At present, solar power generation is considered to be a new energy power generation technology that can effectively solve the above problems and has broad development prospects. Considering factors such as scarcity of land resources and high land prices in big cities, distributed solar photovoltaic power g...

AI Technical Summary

Problems solved by technology

In addition, when the triple power supply system is used in high-rise buildings, since the installation area of ​​photovoltaic photothermal components is much smaller than the cooling area of ​​the building, the cooling capacity of the system cannot meet the cooling load.

However, if the scale of the refrigeration system is increased to meet the cooling load by adding an additional heat drive device, there will be a problem of high operating costs due to the consumption of a large amount of drive heat energy.

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