| Shallow geothermal energy refers to the low-temperature geothermal energy (usually below25℃) in soil, rock and groundwater of the depth from the constant temperature zone of the earth’s surface (15m to22m) to200m, caused by the combined effects of solar radiation and the terrestrial heat flow in the center of the earth heat. This energy can not only be restored, but also be can be renewed, however, it attracts no attention from the public at first because its grade is not so high. Featured by its huge reserve and environmental protection, the mature heat pump technology enables the collection and utilization of shallow geothermal energy to become a reality.The development of energy efficient building in the regions of Hebei, ranging from envelope material selection to an extensive application of new energies, has brought about an energy revolution to HVAC industry though a combination of shallow geothermal energy and ground source heat pump technology in recent years, to the extensive application of new energy, especially in recent years. This thesis has conducted he following aspects of shallow geothermal energy applications in energy efficient building.(1) The analysis described the current situation of shallow geothermal energy at home and abroad, and pointed out that the shallow geothermal energy as one of the new technology of China’s rapid economic development and urbanization accelerate the process of10building energy efficiency. The problems and at this stage in the application, such as ground source heat pump system for hot and cold imbalance, geological basic research lag, a simple analysis, and proposed the main contents of this article.(2) A brief introduction of energy-efficient buildings and shallow:first elaborated the concept of energy-efficient buildings and their energy-saving measures, and to study the course of development of building energy efficiency in Hebei Province, proposed Hebei Province2012building energy efficiency objectives; shallow geothermal energycharacteristics, range of applications, development methods, as well as ground source heat pump (ground source heat pump) systems, groundwater source heat pump system, surface water, ground source heat pump system for heating and cooling principles study on the indoor andshallow geothermal energy into the energy efficient building on the important role. (3) A study of the basic characteristics of shallow geothermal energy in Hebei Province:First, the Hebei Plain Regional geology of geothermal reservoir, cap rock lithology and characteristics were analyzed; geothermal field characteristics of the region, drawn within the Regional Geothermalheat flow value of1.51-1.86HfU, shallow geothermal gradient of2-4℃/100m, and four in the Hebei Plain aquifer group hydrogeological characteristics were analyzed to prove that the region contains a rich, low-temperature geothermal water resources; statistical analysis of shallow geothermal energy reserves obtained in this region has a rich, shallow geothermal resources, amounting to775,557.53×1010KJ, the equivalent of standard coal26462.68×104t. In Caofeidian most Shijiazhuang ranked second; of groundwater source heat pump suitable conditions appropriate conditions and ground source heat pump research and analysis, come to Tangshan, Hengshui, Langfang, Cangzhou, Shijiazhuang and Xingtai Handan and other major regions of the heat pump is suitable for the specific implementation of the project to provide a reliable basis.(4) Case studies of the shallow geothermal energy-efficient buildings:Hebei Construction and service center for research on this project the energy-saving measures and shallow geothermal energy in the project. First, implementation of the project soil source of ground source heat pump system feasibility analysis of the shallow geological structure and ground heat exchanger performance test derived soil heat transfer performance of the underground80m for ground source heat exchanger design program provide a reliable basis for the construction drawings and design of ground source heat exchanger; Second, a ground source heat pump system, ground heat exchanger, ground source heat pump room, terminal equipment setup and operation of the system are described. Finally, project economic analysis, the annual electricity consumption of the system395454.04KWH, the annual electricity304,499.6yuan, with central heating and chiller air conditioning power consumption compared to the use of ground source heat pump system, the annual operating cost savings of546,097.77yuan The static investment recovery period is1.58years. Social results:Hebei Construction Service Center "project, can save74,000tons of standard coal, steel193.5t ore309.6t, water,312700t; save investment of about61.75million yuan; reduce emissions CO216.2million t, SO2104t-, NO compounds668t dust817t.The result shows that the use of shallow geothermal ground source heat pump systems for building heating, cooling can ease the energy shortage and reduce the pressure of regional energy consumption, while it could also reduce pollution, and protect the environment for the development of energy efficient building in Hebei Province, which has far-reaching significance in building a harmonious society. |
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