Research On Remote Monitoring System For Solar-ground Source Heat Pump Units

As a large energy country,China has used coal for energy supply for a long time.Up to now,the proportion of fossil energy in the energy supply system is still very high.In recent years,with the continuous growth of the national economy,the total amount of energy needed by people’s life is also increasing,consuming a large amount of non-renewable energy.At the same time,the environmental problems caused by the use of fossil energy can’t be underestimated.In order to slow down the rate of energy reduction and reduce the difficulty of pollution control,the research and utilization of clean energy supply is the only way for China to adjust the energy structure.Solar energy and geothermal energy are two kinds of clean energy with abundant reserves,which have broad application prospects in the field of energy supply,but there are many disadvantages in single energy supply.In this thesis,combining these two energy sources can complement each other,and a set of remote monitoring complex of SGSHP is devised to insure the efficient manipulation of the complex through laborsaving regulator,adjust the operation mode of the system and maximize the use of solar energy,reduce system energy consumption.In this thesis,a building in Baotou is taken as the energy supply object.The main research contents are as follows:Firstly,profoundly assess the warming theory and this architecture’s properties of SGSHP are,and SGSHP fuel provision complex is built.According to the different energy intensity in different seasons,four operation modes are designed: solar energy alone,solar energy and ground source heat pump combined energy supply Ground source heat pump refrigeration and solar heat supplement in non-renewable energy supply season.Combined with the climate characteristics of Baotou City,the heat load required by the building is analyzed and calculated,and based on this,the components in the unit are calculated and selected.Secondly,assess the detailed needs of the regulator complex,devise the overall skeleton of the regulator complex according to the needs,give the control points,select the equipment in the control system,clarify the control strategy and write the software program.Conduct indepth research on MQTT protocol,build data communication based on MQTT protocol,and complete data transmission between site,cloud platform and remote browser.Place sensors on the data points to be monitored by the system,build a local sensor network,collect all kinds of data through PLC,link PLC with MQTT gateway,upload the collected data in real time and query through browser.Finally,the whole system is tested to ensure the availability of the system.After testing,the system runs well.The operation benefits of the system are analyzed and compared to verify the application advantages of the energy supply system.The SGSHP composite energy supply system is compared with gas-fired boiler energy supply complex,electric heating energy supply complex,GSHP energy supply complex and air source heat pump energy supply complex respectively from three aspects: economic benefit,energy-saving benefit and environmental protection benefit.The results show that the solar ground source heat pump composite system has the best economic benefit and the least annual energy consumption.