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Solar energy coupling biomass village and town building energy supply system based on phase change energy storage

A phase-change energy storage and solar energy technology, applied in the energy and environment fields, can solve the problems of low thermal energy grade, high electrical energy grade, and low conversion efficiency.

Active Publication Date: 2021-06-08
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photovoltaic is the use of power generation devices to convert solar energy into electrical energy. Its advantage is high-grade electrical energy, but its disadvantage is low conversion efficiency. Photothermal uses heat-collecting devices to convert solar energy into heat energy. Its advantage is relatively high conversion efficiency, and its disadvantage is its thermal energy grade. Low

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  • Solar energy coupling biomass village and town building energy supply system based on phase change energy storage
  • Solar energy coupling biomass village and town building energy supply system based on phase change energy storage

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Experimental program
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Effect test

Embodiment 1

[0094] The energy supply system of the present invention utilizes multiple energy sources for coupled heat supply, which brings significant energy-saving benefits compared to the traditional single energy supply system.

[0095] Assuming that the heating season is 4 months (120 days × 24 hours / day = 2880 hours), the user consumes an average of 40 kWh of heat per day during the heating season. Assuming that the solar energy can supply 20 kWh of heat on sunny days, the boiler needs to provide 20 kWh of heat. . Assuming that the biomass fuel is 1,000 yuan / ton (1 yuan / kg), it can provide 5 kWh / kg of heat, and the thermal efficiency of the boiler is 85%. Assuming that half of the heating season is sunny, the total heat can be collected 20 × 60 = 1200 kWh.

[0096] When the user only uses the biomass boiler for heating, the biomass fuel cost is 40×120÷(5×85%)×1=1129.41 yuan in the heating season. When using solar energy coupling for heating, the heating season requires fuel costs ...

Embodiment 2

[0099] The phase-change energy storage-based solar energy and biomass energy coupled energy supply system utilizes staggered peak and valley electricity for heat storage. Compared with the traditional heating system, under the same heat output, its operating cost is reduced, and the The grid is stable and friendly.

[0100] Assuming that the heating season is 4 months (120 days × 24 hours / day = 2880 hours), the user consumes an average of 40 kWh of heat per day in the heating season, of which the boiler supplies 20 kWh of heat. Assume that the biomass boiler needs 0.1 kWh of electricity per hour of operation.

[0101] Assume that the boiler is at 8:00 to 22:00 (this period is peak electricity, and the electricity price is 0.568 yuan / kWh) and 22:00 to 8:00 the next day (this time period is low-valley electricity, and the electricity price is 0.288 yuan / kWh) If the energy is consumed in a balanced manner, the electricity bill for the boiler in the whole heating season is [0.568...

Embodiment 3

[0106] Compared with the traditional energy supply system, the energy supply system of the present invention has higher thermal comfort.

[0107] Thermal comfort is the subjective satisfaction of people with the surrounding thermal environment, and is an important indicator of the quality of air conditioning systems. It integrates various factors such as air temperature, air humidity, air flow, average radiation temperature, etc. Indoor air temperature is the main factor affecting thermal comfort. When the indoor air temperature change rate is too large, it is easy to cause discomfort to people. And it will affect the average radiant temperature and vertical air temperature changes.

[0108] Due to the traditional single heating boiler, when the indoor temperature is low, the heating needs to consume heat, and the domestic hot water cannot be guaranteed to be used at any time. The indoor temperature varies greatly under different time and outdoor temperature conditions, and t...

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Abstract

The invention discloses a solar energy coupling biomass village and town building energy supply system based on phase change energy storage. The solar energy coupling biomass village and town building energy supply system comprises a solar heat collector, a biomass combustion furnace, a phase change heat storage device, a water heat exchanger, a heating heat exchanger, a water pump, a temperature sensor and an on-off valve. Solar energy, phase change heat storage and biomass energy are coupled, the solar energy is fully and reasonably utilized, the biomass combustion furnace is used for energy supplement, heat supply is stable, the solar energy is preferentially utilized, then the heat storage energy is utilized, and the biomass energy is considered finally in principle, reasonable regulation and control of energy are achieved, and heat supply of multiple operation strategies is achieved. Therefore, hot water and heating can be provided for the user side in all time periods. Phase change materials with different phase change temperatures are adopted in the phase change heat storage device, partition heat storage is achieved, heat storage is more reasonable, and energy is not wasted.

Description

technical field [0001] The invention belongs to the field of energy and environment, in particular to a solar energy coupled biomass energy supply system for village and town buildings based on phase-change energy storage. Background technique [0002] Modern heating mainly uses non-renewable fossil fuels as energy. With the continuous reduction of fossil energy and environmental pollution problems, people's awareness of environmental protection is also increasing. Therefore, the use of renewable energy and green energy has become an important part of contemporary energy. research direction. [0003] As the most abundant permanent energy in the world, solar energy has the advantages of universal, harmless, huge and long-lasting. Roughly calculated, the energy obtained by the earth can reach 173,000TW, which means that the energy that the sun irradiates on the earth per second is equivalent to 5 million tons of coal, and the energy irradiating the earth per second is 1.465×1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D12/02F24D11/00F24D19/10
CPCF24D12/02F24D11/003F24D19/1075F24D2200/06F24D2200/14Y02B30/00
Inventor 杨宾侯宇田齐耀张淞屹赵艺茵
Owner HEBEI UNIV OF TECH
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