Solar energy and geothermal energy assistant centralized heating system

A technology for central heating and heating systems, applied in hot water central heating systems, heating systems, solar thermal power generation, etc. performance, saving power consumption and improving utilization

Active Publication Date: 2010-12-22
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the secondary network behind the thermal station, the actual operating temperature of supply and return water is generally around 70 / 50°C, so there is a large heat transfer temperature difference between the primary network and the secondary network. With the gradual popularization of low-temperature terminals such as heating, the water temperature of the secondary network can be further reduced, resulting in a very large irreversible heat transfer loss in the heat exchange process of the thermal station

Method used

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  • Solar energy and geothermal energy assistant centralized heating system
  • Solar energy and geothermal energy assistant centralized heating system
  • Solar energy and geothermal energy assistant centralized heating system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the solar energy and geothermal energy auxiliary central heating system, the heating system is composed of heat source 1, geothermal source absorption heat pump 2, heat user 3, solar collector 4, underground pipe 5, underground pipe circulating water pump 6 , Solar collector circulating water pump 7, valve 11, valve 13, primary heating network 9, secondary heating network 10 and various connecting pipelines and accessories. The primary heat network 9 from the heat source 1 drives the absorption heat pump, and uses the soil source as the low-level heat source of the absorption heat pump 2. The evaporator of the absorption heat pump 2 is connected to the buried pipe 5, and the heat medium absorbs heat from the soil to the absorption heat pump. Heat is released in the evaporator of the heat pump 2, and the return water of the secondary heating network 10 is heated by the condenser of the geothermal source absorption heat pump 2, and the heat is sen...

Embodiment 2

[0030] Such as figure 2 As shown in the solar and geothermal energy auxiliary central heating system, the solar thermal collector 4 and the buried pipe 5 are connected in series for heating. During heating and heating, valve 12 and valve 14 are closed, valve 11 and valve 13 are opened, the evaporator of absorption heat pump 2 first passes through solar collector 4, then enters underground pipe 5 to absorb the heat of the soil, and finally returns to the absorption type The evaporator of the heat pump 2 emits heat. The solar collector 4 is the recharge heat source during the non-heating period, the valve 12 and valve 13 are closed, the valve 11 and valve 14 are opened, the solar collector 4 and the buried pipe 5 circulate in series, and the heat collected by the solar collector 4 Circulate to the buried pipe 5 to supplement the heat of the soil. When the temperature of the outlet water of the solar heat collector 4 is low at night or on a cloudy day, the valve 11 is closed and...

Embodiment 3

[0032] Such as image 3 As shown, the solar and geothermal energy-assisted central heating system is different from Embodiment 2 in that the evaporator of the absorption heat pump 2 first passes through the buried pipe 5 to absorb the heat of the soil, then enters the solar collector 4, and finally returns The heat is released to the evaporator of the absorption heat pump 2. The rest is the same as in Example 2.

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Abstract

The invention discloses a solar energy and geothermal energy assistant centralized heating system belonging to the technical field of centralized heating. A heating station is provided with a geothermal source adsorption heat pump unit, a centralized heating system once-network high-temperature hot water drives the adsorption heat pump, a soil source serves as the low-order heat source of the adsorption heat pump, heating medium adsorbs heat from earth and releases heat in a heat-pump evaporator, and adsorbed geothermy is used for secondary network heat supply. In order to restore soil temperature, the system adopts solar energy to serve as an assistant heat source; in the heating season, solar energy and geothermal energy mutually supplements; in the non-heating season, solar energy is independently used to recharge heat into ground so as to restore soil temperature and keep the soil temperature balanced in the whole year. The system takes the adsorption heat pump to replace a water-water heat exchanger and improves system heat supply amount by recovering environment heat; a solar energy soil heat accumulation mode is used for improving the utilization ration and system stability of the solar energy heat collector; and heat network water is used for driving the heat pump, thus saving a great quantity of electric power consumption, and lowering operation cost.

Description

Technical field [0001] The present invention belongs to the technical field of central heating, and particularly relates to a solar and geothermal energy auxiliary central heating system, specifically a solar and geothermal energy composite heat source central heating system with energy storage function. Background technique [0002] In the current central heating system, the water supply temperature of the primary network is generally 130℃, and the design water supply temperature of some newly-built pipe networks can even reach 150℃. The return water temperature of the primary network is limited by the water temperature of the secondary network, generally 60℃. ~70℃. For the secondary network after the thermal station, the actual operating temperature of the supply and return water is generally around 70 / 50℃, so there is a large heat exchange temperature difference between the primary network and the secondary network. With the gradual popularization of low-temperature terminals...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/18F24J2/00F25B30/06
CPCY02E10/40Y02B30/12Y02B10/40
Inventor 付林刘华张世钢李岩江亿罗勇
Owner TSINGHUA UNIV
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