| Replay: (1) solar buildings combine the overall design of the entire solar Pavilion buildings modeling beautiful, novel and unique, but also to meet the collector installation requirements. According to this principle, the south facade of the building with a large pitched roof structure, a beveled area much larger than the plane, can be arranged more collectors; two do not need to consider before and after occlusion slant on the arrangement of the collector issues, and the shape is also very beautiful. Pitched roof inclination to take 35 °, close to the local latitude, conducive to the collector to fully play its role. (2) heat pipe vacuum tube collector improve the efficiency of the cooling and heating heat pipe vacuum tube collector is a major scientific and technological achievements of the Beijing Solar Energy Research Institute, has high efficiency, resistance to freezing, quick start, good insulation, high pressure , thermal shock, run * many advantages, the important part is composed of high-performance solar air conditioning system. The heat pipe vacuum tube collector for efficient lithium bromide refrigerator 88 ° C heat medium water, thereby improving the efficiency of the entire system of refrigeration; such a collector can also work in the cold northern winter, heating for buildings. (3) the size of the two heat storage tank to speed up the the daily cooling or heating process according to the inherent characteristics within a day of solar irradiance change thermal storage tank can not only make the system stable, you can also put in solar irradiance peak The excess energy is stored in the form of hot water. The large difference is that the set of the system and the general solar air conditioning system, the hot water storage tank of the small two. Small heat storage tank is mainly used for quick start of the guarantee system. The test results show that the small hot water storage tank water temperature can be reached in the summer and winter sunny morning 88 ℃ and 60 ° C, in order to meet heating and cooling requirements. Dedicated cold storage tank (4) reduces the heat losses of the system although the hot water storage tank can store energy, but its ability, after all, is limited. This system is specifically designed to a cold storage tank. In daytime solar irradiation sufficient case, the coolant water generated by the refrigerator can be stored in a reservoir of cold water tank, and its advantages in that the system heat loss in this case is clearly better than the water in the form of the heat medium stored in the hot water storage tank much lower, because the temperature difference between the summer ambient temperature and the coolant water temperature is to be significantly less than the temperature difference between the water temperature and ambient temperature of the heat medium. (5) supporting the auxiliary boiler system round-the-clock to run all run of the solar system are inevitably influenced by climatic conditions. To make the system weather play the function of air-conditioning, heating, the the conventional auxiliary energy is indispensable. The solar air conditioning system optional auxiliary fuel hot water boiler, in the amount of solar radiation during the day and at night need to continue with cold or hot, you can then start the auxiliary boiler, ensure that the system steady run. (6) to switch between the system operation and the working conditions can automatically control system using solar partially replace conventional energy, the system startup, the energy storage and switching between solar and conventional energy function automation is particularly important; Further the system set up several water tanks, how to automatically enable different tank in different operating conditions, take the key to the different pipeline system uptime; Furthermore, the solar system should also be solution automatically prevent overheating and the anti-freezing problem. Therefore, we have designed a set of safety *, fully functional automatic control system for solar air conditioning system. |
