|
In recent years, with the rapid economic development, China's energy consumption increased year by year trend, especially in the air-conditioned building energy consumption and energy consumption is dramatically on the growth trend. Energy consumption for air conditioning systems, environmental pollution, health and other issues, how to reduce air conditioning energy consumption, research \Low temperature radiant cooling air conditioning system (LHRCASs) caters to such a background, is an energy saving, environmental protection, high comfort air conditioning new ideal way. Low temperature radiant cooling system structure is more complex, long lines, most of level layout and water flow rate is low, the presence of dissolved gases in the water cycle negative impact on the system is more obvious, the efficacy of conventional exhaust valve is restricted or difficult to reach place gas effect. This thesis aims to study a simple, easy to operate, highly efficient degassing system. The system according to Henry's law (Henry's Law) in principle, so that the water circulation system by low pressure or vacuum to remove dissolved gases, unsaturated degassed water circulation system to return. Due to achieve air and water balance, which part is returned to the water system has a strong absorption capacity, such as \good degassing effect. In this paper, degasification systems to analyze the dynamics of physical processes, establish reasonable simplified model, using the MATLAB Simulink software package for simple simulation model. According to simulation results, analyze the influence of various factors, the pressure in the system, in addition to the variation of weather conditions. In order to validate the model and analyze the actual law of degasification systems, build a simple test bed degasification systems, and different water height, vacuum, gas flow, etc. In addition to the law of the state to conduct research and analysis, the addition of various factors on gas were investigated. On this basis, the comparative test results and theoretical analysis of the data obtained using the optimal combination mathematical impact of the size of each factor. This thesis low temperature radiant cooling systems continue to refine and improve, from the subtle to achieve building energy efficiency and safe operation of the air conditioning system has important practical significance, and the cryogenic cooling system degassing device's actual application of a guiding role .
|