Research On Solar Energy-Mine Water Source Heat Pump Composite System

In the process of coal mining, a large number of mine water is directly discharged, andmine water and the low-grade heat energy are wasted. It has good economic, environmentaland social benefits to treat the mine water and use the low-grade heat sources. Solar energy isinexhaustible, cheap, safe, and clean pollution-free etc, so it is paid great attention to bypeople.In order to make full use of mine water and solar energy these two kinds of low heatenergy, in the basis of previous work, this paper put forward a kind of solar energy&minewater source compounded heat pump system basing on the background of Fan gezhuang coalmine, analyzed the work principle, operation mode, function and characteristics of this system,and analysed the economical efficiency, energy conservation and environmental protection ofthis system. The following main conclusions were drawn:(1) Solar energy&mine water source heat pump system are connected in parallel, and itworks independently, or operate in union complementing each other, which can not onlysuitable for the actual conditions of the mining area, but also meet the hot demand of miningarea. Solar energy collector is put toward the south, and the dip angle is the local latitude and5o. The calculated collector area is1100m~2, and the solar assurance is65.6%in winter.Theheat storage medium is water, and the volume of the heat storage water tank is83m~3.(2) This paper analysed and compared solar energy&mine water source heat pumpsystem (scheme i), mine water source heat pump system (scheme ii) and cold water chiller+coal boiler system (scheme iii). It drew that scheme i was1.663million yuan, scheme ii was2.827million yuan, and scheme iii was3.593million yuan through the annual cost valueanalysis.So the annual cost of the scheme i is the least, and it has the best economicalefficiency.A energy consumption of scheme i is amounts to standard coal433.1t every year, scheme ii is amounts to standard coal1020.5t, scheme iii is amounts to standard coal5925.7t.So the first energy consumption of scheme i every year is the least.(3) Through the energy conservation analysis, the annual energy-saving quantity of thesolar energy&mine water source heat pump system is2410815MJ, which is equivalent tostandard coal1233.9t during the period of its life. The carbon dioxide emissions reductions is3284.6t, sulfur dioxide emissions reductions is24.7t, and the smoke emission reductions is12.3t.It has obvious energy-saving and environmental benefits.The biggest significance of solar energy&mine water source compounded heat pumpsystem is to improve the comprehensive utilization of solar energy and the low heat sourcemine water,which greatly reduce the energy consumption of the first energy,reduce carbondioxide emissions,make full use of the limited water resources and reduce the wasted water.