Research Search On The Thermai Performance Of Underground Concrete Pile

With the development of science and technology,more and more primary energy consumption and serious environmental pollution that make people enhance awareness of energy saving and more energy-saving technology was born.Ground source heat pump system with use of underground energy is a new energy.It has the advantages of saving non-renewable energy and environmental protection,but the disadvantages are also particularly prominent.Its main disadvantage is that cost in terms of wells and the construction of a long time,so the relevant scholars put forward concrete pile technology that has the advantage of ground source heat pump at the same time compensate the disadvantages of ground source heat pump.It can reduce construction costs,shorten the construction period and the conservation of land resources.This paper studies the concrete pile technology in material selection,regenerative properties and economic energy consumption.Because of using concrete piles,it is better to have good heat transfer effect and mechanical properties unchanged.Firstly,known concrete material ratio on mechanics and corrosion results of Cl-and SO42-salt solutions were determined by erosion test.Analysis of thermal conductivity and heat storage coefficient were measured on normal concrete in the third and fourth groups matching.Finally we got the fourth group of materials ratio values.It guarantees the mechanical properties and improved heat transfer.We establish regenerative test bed and install temperature measurement points.We study on the temperature law in heat storage month and a month for heat.FLUENT simulation software is derived temperature field.It is found that the middle part of the test bed is close to the earth,and it is similar to the computer software simulation.It provides a reliable reference for the computer simulation of the thermal storage of concrete.FLUENT can be used to simulate the heat storage of concrete pile technology.Finally,results are followed by comparing concrete piles systems to conventional air conditioning heating system in economy and energy economy.In first investment unit,it is less than the ground source heat pump system 207? / m~2,but more than the traditional air conditioning heating 1 ? /m~2.It saves standard coal 12.46 Kg / m~2 and reduces emissions about CO2,SO4,NOXand carbon dust.It is 28.6Kg/m~2?0.93 Kg/m~2?0.41 Kg/m~2?7.8 Kg/m~2 in energy efficiency.