Research On Ground Source Heat Pump Heating Problems In Severe Cold Area

With the development of economy, city to speed up the process, grow with eachpassing day real estate development, China’s building energy is showing tremendousgrowth trend, the proportion of building energy consumption is also more and morehigh. In the past200years, established in the coal, oil, natural gas and other fossilfuel based energy system has greatly promoted the development of the society.However, a lot of fossil energy consumption caused serious environmental pollutionand resource depletion. The rise of the concept of sustainable development,prompting people to re-examine the solar, wind, hydro, biomass, geothermal energyand ocean energy has an important impact on future human life and production ofrenewable energy.The development and utilization of renewable energy is impossible to thetraditional way, but to use new technology and process, make it play a greaterefficiency in the premise of not endanger the ecological environment. Renewableenergy utilization of low temperature heat energy must be low grade to a highertemperature before use value, this can be achieved by heat pump.Ground source heat pump is a new technology in HVAC and utilization ofrenewable energy, is the field of building energy conservation international energyefficient technologies. In1997, the Chinese government and the United States signedthe "book" cooperation agreement between China and the United States by theground source heat pump, ground source heat pump to start cooperation to establishdemonstration projects. In2005, the Ministry of construction will be officially listedin ground source heat pump technology is one of ten new technology for theconstruction industry, and issued national standards; in2006, the Ministry ofconstruction and the Ministry of Finance jointly issued an important document, as theproject application of renewable energy buildings establish special financialsubsidies to support, guide the development of renewable energy technologyapplication in buildings, promote its application in engineering the scale and speed ofdevelopment; science and Technology Department started "eleven five" NationalScience and technology plan--efficient application of water source heat pumpresearch and demonstration of the key technology, the ground source heat pump hasbecome the highest level of national subject, aimed at resolving the current ground source heat pump are common, basic technical problems. In2007, ground sourceheat pump project demonstration city. Ground source heat pump in China hasgradually been recognized by the community, to realize from the point to surface, thecomprehensive promotion from the demonstration project to the city leveldevelopment.In this paper, starting from the actual project, the first of our cold regions (ACase Study) of three existing ground source heat pump project conducted fieldresearch, Analysis of the system in the form and operation status of each project,compared to the beginning of each project investment, operating costs and comparedwith systems using conventional energy sources such as annual cost savings. Thenfrom a ground source heat pump system energy efficiency, the economic andenvironmental benefits aspects applicability analyzes were carried out, The groundsource heat pump heating system with conventional coal-fired heating system, gasheating system, fuel system heating and electric heating systems were compared,Analysis of the respective advantages and disadvantages of each system has, as wellas in real life and production has practicality. Finally, through the ground source heatpump and ground heat exchanger using a form of analysis of the characteristics ofthe project, Summarizes the ground source heat pump ground heat exchanger designprinciples and methods used to assess the economics of the various design options,outlines the optimization of ground source heat pump and ground heat exchangerdesign process steps.Through the analysis, considering various factors, derived ground source heatpump system has a good feasibility and distinct advantages for development andbroad space for development in our cold regions, can gradually replace conventionalenergy for heating, heating became popular novel way.