Co-current Loop Thermosyphon with Active Working Fluid Management: Application for Water Recovery in Flue Gas

2016 ◽  
Author(s):  
Tao He ◽  
Wei Zhong ◽  
Shanshan Huang ◽  
Jon P. Longtin
Keyword(s):  
Flue Gas ◽  
Fluid Management ◽  
Working Fluid ◽  
Current Loop ◽  
Water Recovery ◽  
Management Application

scholarly journals Waste Heat and Water Recovery System Optimization for Flue Gas in Thermal Power Plants

2019 ◽  
Vol 11 (7) ◽  
pp. 1881 ◽  
Author(s):  
Syed Shamsi ◽  
Assmelash Negash ◽  
Gyu Cho ◽  
Young Kim
Keyword(s):  
Ambient Temperature ◽  
Flue Gas ◽  
Power Plants ◽  
Waste Heat ◽  
System Optimization ◽  
Dew Point ◽  
Working Fluid ◽  
Water Yield ◽  
Water Recovery ◽  
Recovery System

Fossil-fueled power plants present a problem of significant water consumption, carbon dioxide emissions, and environmental pollution. Several techniques have been developed to utilize flue gas, which can help solve these problems. Among these, the ones focusing on energy extraction beyond the dew point of the moisture present within the flue gas are quite attractive. In this study, a novel waste heat and water recovery system (WHWRS) composed of an organic Rankine cycle (ORC) and cooling cycles using singular working fluid accompanied by phase change was proposed and optimized for maximum power output. Furthermore, WHWRS configurations were analyzed for fixed water yield and fixed ambient temperature, covering possible trade-off scenarios between power loss and the number of stages as per desired yields of water recovery at ambient temperatures in a practical range. For a 600 MW power plant with 16% water vapor volume in flue gas at 150 °C, the WHWRS can produce 4–6 MWe while recovering 50% water by cooling the flue gas to 40 °C at an ambient temperature of 20 °C. Pragmatic results and design flexibility, while utilizing single working fluid, makes this proposed system a desirable candidate for practical application.

scholarly journals Experimental Study of a Lab-Scale Organic Rankine Cycle System for Heat and Water Recovery from Flue Gas in Thermal Power Plants

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4328
Author(s):  
Young-Min Kim ◽  
Assmelash Negash ◽  
Syed Safeer Mehdi Shamsi ◽  
Dong-Gil Shin ◽  
Gyubaek Cho
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Power Plants ◽  
Thermal Power ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Water Recovery ◽  
Cycle System ◽  
Fossil Fuel Power Plants

Fossil fuel power plants can cause numerous environmental issues, owing to exhaust emissions and substantial water consumption. In a thermal power plant, heat and water recovery from flue gas can reduce CO2 emissions and water demand. High-humidity flue gas averts the diffusion of pollutants, enhances the secondary transformation of air pollutants, and leads to smog weather; hence, water recovery from flue gas can also help to lessen the incidence of white plumes and smog near and around the power plant. In this study, a lab-scale system for heat and water recovery from flue gas was tested. The flue gas was initially cooled by an organic Rankine cycle (ORC) system to produce power. This gas was further cooled by an aftercooler, using the same working fluid to condense the water and condensable particulate matter in the flue gas. The ORC system can produce approximately 220 W of additional power from flue gas at 140 °C, with a thermal efficiency of 10%. By cooling the flue gas below 30–40 °C, the aftercooler can recover 60% of the water in it.

Employing Inverted Brayton Cycle to Solve Stack Temperature Problems After Water Recovery From HAT Cycle Exhaust Gas

2008 ◽  
Author(s):  
Kuifang Wan ◽  
Yunhan Xiao ◽  
Shijie Zhang
Keyword(s):  
Flue Gas ◽  
Ambient Pressure ◽  
Pressure Ratio ◽  
Inlet Temperature ◽  
Brayton Cycle ◽  
Exhaust Gas ◽  
Water Recovery ◽  
Electrical Efficiency ◽  
Exhaust Heat ◽  
Induced Draft Fan

By adding an induced draft fan or exhaust compressor between flue gas condenser and stack to make the turbine expand to a pressure much lower than ambient pressure, this paper actually employed inverted Brayton cycle to solve stack temperature problems after water recovery from Humid Air Turbine (HAT) cycle exhaust gas and compare the effect of different discharging methods on the system’s performance. Comparing with the methods of gas discharged directly or recuperated, this scenario can obtain the highest electrical efficiency under certain pressure ratio and turbine inlet temperature. Due to the introduction of induced draft fan, in spite of one intercooler, there are twice intercoolings during the whole compression since the flue gas condenser is equivalent to an intercooler but without additional pressure loss. So the compression work decreases. In addition, the working pressure of humidifier and its outlet water temperature are lowered for certain total pressure ratio to recover more exhaust heat. These enhance the electrical efficiency altogether. Calculation results show that the electrical efficiency is about 49% when the pressure ratio of the induced draft fan is 1.3∼1.5 and 1.5 percentage points higher than that of HAT with exhaust gas recuperated. The specific works among different discharging methods are very closely. However, water recovery is some extent difficult for HAT employing inverted Brayton cycle.

Entropy generation analysis of heat and water recovery from flue gas by transport membrane condenser

Energy ◽  
2019 ◽  
Vol 174 ◽  
pp. 835-847 ◽  
Author(s):  
Liehui Xiao ◽  
Minlin Yang ◽  
Shuaifei Zhao ◽  
Wu-Zhi Yuan ◽  
Si-Min Huang
Keyword(s):  
Entropy Generation ◽  
Flue Gas ◽  
Water Recovery

Heat exchange and water recovery experiments of flue gas with using nanoporous ceramic membranes

2017 ◽  
Vol 110 ◽  
pp. 686-694 ◽  
Author(s):  
Haiping Chen ◽  
Yanan Zhou ◽  
Sutian Cao ◽  
Xiang Li ◽  
Xin Su ◽  
...  
Keyword(s):  
Heat Exchange ◽  
Flue Gas ◽  
Ceramic Membranes ◽  
Water Recovery

scholarly journals Simultaneous heat and water recovery from flue gas by membrane condensation: Experimental investigation

2017 ◽  
Vol 113 ◽  
pp. 843-850 ◽  
Author(s):  
Shuaifei Zhao ◽  
Shuiping Yan ◽  
David K. Wang ◽  
Yibin Wei ◽  
Hong Qi ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Flue Gas ◽  
Water Recovery ◽  
Simultaneous Heat

Numerical Study of Transport Membrane Condenser Heat Exchangers

2016 ◽  
Author(s):  
Esmaiil Ghasemisahebi ◽  
Soheil Soleimanikutanaei ◽  
Cheng-Xian Lin ◽  
Dexin Wang
Keyword(s):  
Flue Gas ◽  
Heat Exchangers ◽  
Ceramic Membrane ◽  
Waste Heat ◽  
Numerical Study ◽  
Tube Bundle ◽  
Pure Water ◽  
Separation Mechanism ◽  
Low Grade ◽  
Water Recovery

In this study tube bundle Transport Membrane Condenser (TMC) has been studied numerically. The tube walls of TMC based heat exchangers are made of a nano-porous material and has a high membrane selectivity which is able to extract condensate pure water from the flue gas in the presence of other non-condensable gases (i.e. CO2, O2 and N2). Low grade waste heat and water recovery using ceramic membrane, based on separation mechanism, is a promising technology which helps to increase the efficiency of boilers and gas or coal combustors. The effects of inclination angles of tube bundle, different flue gas velocities, and the mass flow rate of water and gas flue have been studied numerically on heat transfer, pressure drop and condensation rates. To assess the capability of single stage TMC heat exchangers in terms of waste heat and water recovery at various inlet conditions, a single phase multi-component model is used. ANSYS-FLUENT is used to simulate the heat and mass transfer inside TMC heat exchangers. The condensation model and related source/sink terms are implemented in the computational setups using appropriate User Defined Functions (UDFs).

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