|
Beijing Qinghe sewage treatment plant from the start, moving southeast across the Fifth Ring Road, continue south to reach the Beijing Olympic village, travel to more than 7 km. In three or four years ago, no one would a sewage treatment plant and the Olympic Games with Lenovo key projects. However, the Olympic Village, reclaimed water pump project to look into the distance would have only two places to a "hug"?? Olympics, Qinghe sewage treatment plants discharge of reclaimed water, to provide athletes with air conditioning, refrigeration area will reach 413,000 square meters . In addition, the system can meet winter heating demand. As the run for decades in foreign cities (sewage) water heat pump system of large scale use in China has not set a precedent, can be said that the Olympic Village project to expand the utilization of urban sewage significance. By the end of June, Professor of History of Thermal Engineering, Tsinghua University Lin frayed nerves and can finally relax a little?? As the Olympic Village, reclaimed water heat pump system discussion group members, from 2005 to promote the participation of renewable water source heat pump technology for the Olympic Village, investigate and provide a feasibility report, and then to do countless experiments later, she has adhered strictly to this project for 3 years. Shi Lin reason for making use of renewable water source heat pump, water source heat pump because she thinks the key is the source of the problem in a variety of sources, recycled water will not cause other environmental problems is the very value of the heat pump source. Now cities have sewage treatment plants, and sewage treatment capacity increases, if the sewage treatment plant for treated water source heat pumps, low cost, recyclable energy will be considerable. Moreover, the regeneration temperature of the water is very stable. According to monitoring, Qinghe sewage treatment plant secondary effluent for the annual maximum temperature is 26.5 degrees Celsius, the minimum temperature is 12.5 degrees Celsius water temperature curve is very flat. However, the project has been questioned by some experts that the water intake and pump room far from the Olympic Village (the total length of 3.7 kilometers one-way pipeline), water pumps, power consumption will be relatively large, it is difficult to achieve energy efficiency. In this regard, the history of Lin also acknowledged that the project is indeed "a little far away." Therefore, in order to achieve energy saving, efficient use of equipment, such as plate heat exchanger, centrifugal pump units, three pump-saving measures such as to make the overall system performance to a higher level. Technological breakthroughs in the use of plate heat exchanger can be described as the Olympic Village renewable water source heat pump project is a major technological breakthrough. Compared to the widely-used shell and tube heat exchanger, it low cost, small size, high efficiency heat exchanger. Plate heat exchanger shell and tube costs about 30% of the heat exchanger. However, sources do exist easily with water scaling problems, would reduce the heat transfer efficiency. Therefore, the research group to study the laws of dirt, the relationship between it and the heat and the heat transfer. To this end, Tsinghua University research team built a number of experimental units to study the dirt. Such studies are interdisciplinary field, no one before the reclaimed water system as a heat source too. Environmental Studies Department of sewage, limited study of the composition is less than the number of meet emissions standards, do not care about the relationship between the dirt and heat transfer. Thus, learning to become experts in thermal physics microbial researchers. Through sampling, the type of group on the dirt microorganisms, factors affecting the growth of dirt and time-varying laws. A complete cycle of dirt would 56 10 days, during the study, the team has lost count of the number of experiments done. Finally, they collected a large quantity of water, dirt, information, and obtained its heat curve. In addition, poor cleaning plate heat exchanger, the research group invented the reign of cleaning methods, it has also become the Olympic Village project to develop renewable water source heat pump a major contribution to the field. According to estimates, the project's heating system efficiency (COP) to 3.67, this is a very conservative calculation, and has included measurements pump heat pump and water consumption. In addition, the system can make the Olympic village to save coal-fired 3,600 tons per year, 8600 tons of carbon dioxide emissions. The Olympic Village project, the most important principle during the Olympic Games is of course the safety of system operation and reliability. However, after the Olympic Games, investment income and the economy of the system was running very seriously. As a project, one of the participating units, Huaqing Group, the project changed the mode of operation of the previous project, set up a special energy investment company, carry out energy investments. The project from the research, design, equipment bidding, management, fees overall responsibility to operate all the aspects of system security, technology, economy, energy, etc. to do a comprehensive balance of performance and consideration. Among them, hot and cold on the project to implement metering and charging, this is a demonstration project of Beijing. Participate in the Olympics from the start, the original high-temperature heat pump in the rich history of research on the results of Lin, is to enter a new area of research. Now, she and her research team to focus on sewage plant, hoping not only to water recycling for heating and cooling, you can also do a comprehensive attempt, such as burning of sludge drying, or heating sewage Anaerobic sludge used to generate the reaction gas, etc.. I am an expert from china-pcb-assemblies.com, while we provides the quality product, such as Circuit Assemblies Manufacturer , Aluminum Core Pcb, Circuit Assemblies,and more.
Related Articles -
Circuit Assemblies Manufacturer, Aluminum Core Pcb,
|
