Mathematical Model Establishing And Applying For Energy-saving Performance Assessment Of The Nursery Houses Of Pig Farms In Sichuan Basin Area

In recent years, with the rapid development of large-scale pig industry, in pig production a large number of biochemical energy was used for heating, especially the coal was as the main raw material, large amounts of toxic and harmful gases emitted by burning heavily polluted atmospheric environmental quality. Pig production has become a serious source of pollution what cannot be ignored by people. Improve the energy efficiency of buildings was not only the most effective measures to reduce emissions of harmful gases and urgent. The main object of the paper was the nursery in Sichuan Basin area farms, aims to establish a basic model used to estimate the current size of the pig nursery building energy loss and energy-saving potential, for the future design of energy-efficient and high income pig nursery construction program to provide reference.In this paper, based on the study of heat loss of existing nursery to determine the ways to heat loss, use the combination of architectural physics and mathematical modeling knowledge to design models that has reference value for both the future nursery design and construction and post-construction assessment. Using the national standard methods of engineering measurements to field measured specifications of the data in Sichuan Basin existing three different field nurseries, after changing the model formula, substituted data into it to calculate heat loss differences among the three fields. By changing a particular material (the existing and most widely used material parameters was as reference) a single factor such as the type of glass, different walls etc., to evaluate the cooling unit of each building in the whole nursery share of heat loss weight. Then the existing nurseries were reconstructed to energy saving and the use of models to estimate the energy saving potential. Eventually introduced economic value, through environmental control, mathematical modeling and building physics could obtain the best pens parameters to find a mathematical model.The main conclusions of the paper were:① Studied the heat loss ways of nursery, combined with knowledge of mathematical modeling and environmental control to propose mathematical model, which could estimate the amount of heat per unit volume of the nursery.②he heat loss per unit volume of pig farm nursery of Jin Li Cheng Du Agriculture and Livestock Development Co Ltd., Shang Qing Si Chuan Agricultural Development Co Ltd. and Jian Yang Agricultural and Livestock Co Ltd. in the theoretical case of the day in winter were 51.995,36.931 and 55.207kJ respectively, after the theoretical energy saving in the case of the day in winter, the heat loss per unit volume were 31.660,30.930 and 31.763kJ respectively, the range of energy saving efficiency ratio was 16.25%～42.47%, there is very big conservation potential in this. According to the average energy conversion can be concluded that the three piggery can save feed 303.305,125.692 and 358.644 kg respectively, and save land, pesticides and energy consumption of fodder processing indirectly, to bring greater economic and ecological benefits.③ According to the building thermal engineering environmental and environmental engineering related research, proposed the best nursery pens mathematical model.④aking some suggestions and references for the construction of a good nursery, starting from the climatic conditions, consider the full range of all aspects from site selection, construction, doors, windows, building envelope, roof, discounted equipment, and proposing the recommended low thermal resistance of wall and woof in Sichuan according to the different climate zones...