Mei Wah series low temperature waste heat power generation technology

1. What is the waste heat (low heat) energy is no longer in use due to human activity and production plan species need heat in the advantage of the end of the discharged waste heat or the call is called heat. Modern human activities with a lot of waste heat (heat), especially industrial production and manufacturing activity is mainly due to a large number of heat, a lot of waste heat is these (heat) emissions, it is deteriorating our human condition. How to reduce and make good use of waste heat (heat) is one of the important issues currently facing our human living environment. 2, the use of waste heat resources in the current status quo of China's energy situation is grim fundamental reason is energy inefficient. Output efficiency per ton of standard coal equivalent to only 10.3% in Japan, the United States 28.6%. China's industrial energy use in the past 60 to 65% of the energy is converted to heat resources. Currently most waste heat utilization are the United States, its utilization rate 60% utilization rate in Europe is 50%, only 30% of our country. To heat (heat) the use of the current situation, our country there is a great use of space. 3, waste heat recovery for power generation as the most significant energy shortage worldwide, countries are committed to energy conservation, emission reduction, and strive for sustainable development. Based on the fact that the energy shortage problem has become increasingly important utilization of waste heat energy endeavors, countries are strengthening investment and research in this area, hoping to get bigger, more revenue. There are many ways of energy use and a variety of methods, but most important, the most meaningful, the most valuable use or generation, but especially in low temperature waste heat power generation over generation technology is relatively backward, restricting its further development. 4, United States Wah series low temperature waste heat power generation technology (1) an organic working fluid cycle power generation system of organic working fluid cycle power generation system is different from the traditional water (steam) cycle working fluid for the power generation system that uses an organic working fluid (such as R123, R245fa, R152a, dichloroethane, propane, n-butane, isobutane, etc.) as the working fluid cycle power generation system, since the organic working fluid at a relatively low temperature gasification can produce higher pressures to drive the turbines ( turbine) acting, so organic working fluid cycle power generation system can be around the flue gas temperature 200 ℃, the water temperature at about 80 ℃ realization of value generation. This technology is more advanced applications developed technology in recent years, some enterprises through the introduction of absorption, have mastered the technology, but also have a more excellent products at home and abroad application. High efficiency of the organic working fluid cycle power generation system, a simple structure, no oxygen, desalination, sewage and water drainage facilities. Condenser in general in positive pressure slightly above ambient atmospheric pressure, without setting a vacuum support system. Turbine intake and exhaust pressure is high, the required flow through a smaller area, the small turbine size, easy-to-compact design and manufacturing. Management and maintenance costs low. (2) hot air dryer cycle power generation system which is characterized by continuous burning first, because the working fluid does not participate in the combustion, so there is no knocking combustion engine, low noise; secondly can use any fuel, its combustion outside the combustion process and working fluid irrelevant for a variety of heat sources, no special requirements for combustion, small size, light weight, long life, easy maintenance, high combustion efficiency. Stirling cycle power generation system is the use of waste heat from low temperature waste heat recovery for power generation, recyclable waste heat 100 ℃ to 300 ℃, and can reach 20% of the power generation efficiency. From the data, the power generation efficiency better than the current low-temperature steam cycle power generation efficiency of the organic working fluid power systems and power systems market, the device under conditions of 100 ℃ heat power generation efficiency of 7.3%, the power generation efficiency at 150 ℃ for 13.7% 200 ℃ under the conditions of power generation efficiency of 18.4%, under the conditions of 250 ℃ power generation efficiency of 22.1%, under the conditions of 300 ℃ power generation efficiency of 25.0%. Under such conditions the temperature waste heat power generation to achieve this level of efficiency is the best present you can see, to the transition from low-temperature heat into electrical energy advanced technology. (3) in supercritical carbon dioxide cycle power generation system of supercritical carbon dioxide generating system is supercritical carbon dioxide fluid Rankine cycle system for the working fluid, carbon dioxide turbine dedicated turbine as the core technology of the latest cogeneration technologies. This cogeneration power system in terms of a more broad application advantages, the technical indicators are better than the use of steam billow Rankine cycle system and the most advanced wave organic Rankine cycle system, especially in terms of power generation efficiency and equipment size It has a clear advantage. Supercritical carbon dioxide is a heat engine platform technology, is currently available for the power range 250kWe to 50Mwe design, efficiency up to 30%. Applications include gas turbines, stationary power generators, industrial waste heat recovery, solar heat, geothermal heat mixing cycle internal combustion engine.