Solar and GSHP (ground source heat pump) combined energy supply system for buildings

Abstract

The invention discloses a solar and GSHP (ground source heat pump) combined energy supply system for buildings. The sytsem provided by the invention comprises two subsystems, namely a solar and auxiliary GSHP system and a pure GSHP system, wherein the solar and auxiliary GSHP system comprises a solar thermal collector, a thermal storage water tank, a GSHP unit No.1, a ground heat exchanger No.1, a collected heat circulating water pump, a unit ground source collateral circulation water pump No.1, a unit user collateral circulation water pump No.1, indoor end equipment, a collected heat controlvalve, a heat accumulation control valve, solar supply heat control valves No.1 and No.2, a unit ground source collateral control valve No.1, a unit user collateral control valve No.1, heat accumulation / heat supply operational mode switch control valves No.1-No.4 and a connecting line; the pure GSHP system comprises a GSHP unit No.2, a ground heat exchanger No.2, a unit ground source collateral circulation water pump No.2, a unit user collateral circulation water pump No.2, indoor end equipment, a unit ground source collateral control valve No.2, a unit user collateral control valve No.2 and a connecting line.

Description

technical field [0001] The invention relates to building heating and heating technology, in particular to a solar energy-ground source heat pump combined building energy supply system. Background technique [0002] With the development of the times and the advancement of technology, people have put forward higher and higher requirements for the comfort of the indoor environment and living conditions, which has brought about an increasing demand for heating, cooling and hot water supply in various buildings in cities and towns. . The traditional building cooling system is realized by central air-conditioning or small single-unit air-conditioning system, while heating and hot water supply are mostly completed by central heating system. Relevant data show that my country's building energy consumption accounts for more than 30% of the total energy consumption, while heating and air conditioning energy consumption accounts for 50-70% of building energy consumption. The energy c...

AI Technical Summary

Problems solved by technology

Therefore, the problems that still need to be solved in solar heating technology include: the matching of low energy flux density solar energy and building heating demand, the integration design of large-scale solar thermal collection system and building, and the realization of year-round comprehensive solar thermal storage for long-term cross-seasonal Utilization problems, short-term solar thermal storage to solve the problem of uneven day and night, suitable auxiliary energy systems to solve the problem of heating reliability guarantee, etc.

For the solar ground source heat pump combined energy supply system designed to meet the heating demand, it is generally necessary to reasonably match the radiator area to ensure the balance of the ground temperature, but this system cannot meet the cooling demand of the building, so it is difficult to achieve a system at the same time The purpose of comprehensive energy supply

For the solar ground source heat pump combined building energy supply system designed to meet both heating and cooling needs, a single heat pump unit is generally used at present. On the one hand, solar heat storage in the system will affect the use of ground source heat pumps in summer. On the other hand, when the heating load of the building is much greater than the cooling load, the long-term operation of the system will inevitably lead to the destruction of the ground temperature balance.

Images