Energy-saving And Environment-protective Design Of Heating Systems In Greenhouse

Resource-saving and environment-protection are common problems of all of countries in the world. Our country attaches high importance to the implementation of the sustainable development strategy, explicitly proposes that the construction of resource-saving and environment-friendly society must be speed up. The rapid development of national economy will increase the resources-consumption, enlarge the environment-pressure. This country has to speed up the transformation of economy growth way, develop the circulation economy vigorously, construct the resource-saving and environment-friendly society and promote the coordinative and sustainable development of agricultural economy. Based on the thought above, the design of new energy-saving and environment-protective greenhouse heating system is researched in this paper.It is a urgent topic of greenhouse industry to choose and design heating-systems properly, so as not only to meet the growth need of crops, but also to save energy and protect environment to the greatest limit. The design theory of greenhouse heating-systems is systematically studied in this paper. The mainly factions which affect the temperature in greenhouse are analyzed, such as solar radiation, heating, heat exchange between building, heat exchange to earth and so on. The energy consumption of greenhouse environment is analysed comprehensively and systematically, and the mathematical models from exact to approximate calculation of greenhouse heating loads are obtained.The existing greenhouse heating ways, such as heating by hot water, hot wind, and heating the plant earth by electrothermal wire and so on, are briefly introduced. For the purpose of decreasing the energy expense and solving the problem of air pollution resulting from fuel, some new reasonable energy-saving and environment-protective heating schemes are mainly explored.The solar energy is clean, inexpensive, inexhaustible and has prominent merit, not only energy-saving but also environmental protection. The solar energy heating system design mentality is discussed on the paper. According to the heating characteristic of the underground driving-type solar energy regeneration system, the energy conservation characteristic and the efficient analysis are carried on to it, the contrast analysis in the traditional heating way...