Combined Heating Solution Of Solar Collector And Ground Source Heat Pump

In the world,ground source heat pumps used for building heating and domestic hot water are increasing rapidly.The ground source heat pump obtains heat from the soil through U-shaped pipes in vertical boreholes.In order to reduce the power demand of the heat pump system,this study will explore an effective way to combine the ground source heat pump and the solar collector.The system can be implemented in many ways to form different advantages.In order to analyze different system integration schemes of the combination of solar collector and ground source heat pump,this study uses CARNOT software to simulate and analyze different integrated systems.In this study,a 1120 square meter kindergarten building in Mongolia is simulated and analyzed.The solar collector is installed in the building,which is combined with the ground source heat pump system.However,the system did not work properly for eighth years after its completion.Therefore,the main purpose of this study is to try to find out the reasons why the system cannot operate through modeling and simulation analysis,and how to successfully combine the solar collector with the ground source heat pump.The second goal is to find the best energy efficiency scheme for using solar collectors.In order to achieve this goal,this study focuses on solving the following two problems:(1)effectively integrate solar energy and ground source heat pump,and make efficient use of solar energy;(2)Combined with the local climate characteristics of Mongolia,the scheme combining solar energy and ground source heat pump can provide high-efficiency heating.The main work and achievements include:1.The design and implementation of a solar vacuum collector system installed in a kindergarten building were established to provide domestic hot water.2.Based on MATLAB and CARNOT,a simulation model for system analysis and operation decision-making is established,and the coupling operation characteristics of the system are mainly studied.The size setting,modeling and control of the ground source heat pump and solar collector system in the model are more in line with the actual system,and are used to guide the work of the new solar collector system.3.When the heat pump is running,it absorbs heat from the soil to reduce the soil temperature,so that the coefficient of performance of the heat pump is not high,COP = 2.52.Therefore,by compensating the soil heat with the solar vacuum collector,the COP index increases to 3.36.In summer,it is very important to increase soil heat with the help of solar collectors.Other changes in the system include the introduction of solar collectors to take into account the changes in the thermal load of the building and the size of the peak load device.In order to make the solar energy system more user-friendly,the model is improved.This study explores an effective way to strengthen the utilization of solar energy and finds a relatively energy-saving thermal energy utilization system for Mongolia.