| Along with the global climate conference held in Paris 2015, Chinese are facing increasingly serious energy and environmental issues have been put on the national agenda. However, as the world’s largest developing country, regardless of socio-economic value of energy efficiency or consumption per unit of energy generated, our country lags behind the United States, Japan and other major developed countries, and more than other developments in the total energy consumption many countries is much higher. The face of increasingly grim reality contradiction between economic development and environmental protection, reduce air conditioning system of fossil fuel consumption and increase renewable energy sources (such as solar, etc.) the utilization of considerable importance for energy saving building.In this paper, a novel use of direct solar dehumidification regenerated solid bed, a porous material on the water absorption properties of high temperature and moisture desorption features complete dehumidification and regeneration has been presented. In this paper, dehumidification and regeneration performance design solid dehumidifying experimental test bed were analyzed to provide basic experimental basis and theoretical support for its engineering applications. Compared to conventional solar dehumidification, the dehumidification herein developed a solid bed regenerative solar radiation directly, there is no use of the first collector collector system then converts the energy into the energy needed for regeneration of the desiccant material of the secondary energy conversion issues, improve the efficiency of the system, effective use of solar energy, energy-saving effect can be achieved. Dehumidification system using the traditional, cheap and corrosion pore silica gel as a desiccant material, to meet the conditions of dehumidification systems reduce early investment.According to the experimental results, the condition of dehumidifying bed thickness of 50mm, the effective bed dehumidification time was 120min. Through the different conditions of the experimental tests, the effective amount of desiccant dehumidification unit mass of the material under test conditions is 69.2g/kg, while the amount of dehumidification by a maximum of 4.34g/kg, the maximum adsorption energy efficiency is 0.147. In all the experiments in test conditions, "900W+Air conditioning and ventilation" effective amount of regeneration conditions of maximum for 838g; and "300W+Air conditioning and ventilation" condition effective regenerative minimum amount for 336g. Maximum regeneration effective rate of these three ways are 50.25%, 52.77% and 43.07%, respectively in pure radiation, radiation+ventilation and air conditioning. Through test and analysis of microwave and hot air regeneration of the three conditions, the microwave regeneration average renewable energy efficiency is 174.45 g/(kg-kW-h), which is higher than hot air regeneration for about 42.07g/(kg·kW·h), and reflecting the microwave regeneration savings energy for 31.78% than that of hot air regeneration. The test results showed that:microwave regeneration has the advantage of the regeneration time is short, high and low regeneration energy regeneration..The results show that:Dehumidifying efficiency of dehumidification bed has a related logarithmic law to time, the amount of dehumidification regenerative bed is closely about regeneration time, solar radiation intensity and the regeneration temperature, and has a related logarithmic law to solar radiation intensity. In this paper, Combined with experimental results, the dehumidifying bed in pure mathematical model of radiation regeneration condition is established, and the dehumidifying bed steam generation rate in the regeneration process of the equation changes have also been found. Compare theoretical calculation with the experimental value, the maximum error is less than 1.2g/min, and reflecting the model has a certain accuracy. |
PDF Full Text Request