Heat Exchanger System

About

The current technology is primarily targeted to reduce fresh water consumption, boost condensation efficiency up to 70%, and lower capital costs in power plants. Key Features:
Up to 50% reduction of fresh water consumption by using water recovery from flue gas exhausted by boilers/gas turbines
Up to 70% higher condensation efficiency enabled by a unique, hybrid condensing heat exchanger (CHX) and closed loop cooling water storage tank Flexible location of the IRCHX in existing flue gas treatment systems: the module can be installed between the flue gas treatment system and the stack Increased cooling effect provided by hybrid internal and external tubing geometry Longer life of equipment due to less particulate accumulation and acidic corrosion in the mechanical components Environmental impact:
Superior acid emission control (NOx, SOx, Sulfuric Acid, Nitric Acid) due to two-step acid removal: primary separation with condensation and secondary separation with liquid-phase reactions
Lower exhaust temperature of flue gas at the stack
Lower moisture contents in exhaust flue gas at the stack. Applications: The IRCHX is specifically designed for and can be immediately implemented in existing and new fossil-fuel power plants: Coal-fired Natural gas-fired Oil-fired The IRCHX system can also be used: For chemical plants For HVAC systems As backup equipment in case of acid scrubber system failure Project Summary: Arkansas State University (ASU) is seeking to license this novel (patent pending) condensing heat exchanger system for integration into fossil fuel power plants. The IRCHX can be integrated into an existing flue gas treatment system and provides significant benefits for existing and new plants. Among other things, it is targeted to solve the issues of constrained water supply by reducing fresh water consumption theoretically to zero net amounts at steady state. For example, fresh water consumption may be reduced up to 100 million gallons per year in a 120MW combined cycle power plant and up to 320 million gallons per year in a 600MW coal-fired power plant. Furthermore, a pre-scrub condensation step in the system substantially reduces cost by reducing the scrubber capacity requirement. The IRCHX has higher condensation efficiency than a typical condensing heat exchanger, targeting 70% rather than current industry standards of 30%, due to novel tube configuration and closed loop cooling system. Additional IRCHX benefits include low temperature heat recovery after economizer, lower exhaust temperature, moisture contents, and acid emission in flue gas at the stack. Potential Markets Overview: 1. Existing U.S. power plants According to the U.S. Energy Information Administration, most of the electricity in the United States is produced using fossil fuels. In 2011, coal and natural gas were the fuel for about 42% and 25% respectively of electricity generated in the United States. In 2011, the nationwide number of coal-, natural gas-, and petroleum- fired power plants numbered 589, 1646, and 1145 respectively. 2. New U.S. power plants In 2012, U.S. Department of Energy reported a total of 48 coal-fired power plants under construction and at early stages of development. From 2011 through 2015, a total of 258 natural gas-fired power plants are expected to be built. The U.S. Energy Information Administration forecast 222 gigawatts of generating capacity to be added between 2010 and 2035 which equates to one-fifth of the current U.S. capacity. The largest share, 58%, will be fired by natural gas, followed by renewable sources, and coal at 8%. Sources: U.S. Energy Information Administration, U.S. Department of Energy, The Wall Street Journal. Development Status: R&D stage. Patent Status: Patent pending. Commercialization Status: Available to be licensed. Seeking funding/collaborations