This page has only limited features, please log in for full access.
A combined cycle power plant with inlet air heating (CCPP-IAH) system is proposed to solve the problems of ice and humidity blockages in winter climate. The performance of the CCPP-IAH system under part load conditions is analyzed via both experimental and simulation methods. The application of the inlet air heating technology significantly improves the part load efficiency and enhances the operational safety of the combined cycle power plant under complex meteorological conditions. Results show that a higher inlet air temperature will contribute a lower gas turbine thermal efficiency for proposed system. However, the heated inlet air by the recovered energy in heat recovery steam generator raises efficiencies for both the heat recovery steam generator and the overall system. The fuel consumption drops by 0.02 kg/s and 0.03 kg/s under the power load of 65% and 80%, respectively. The inlet air humidity decrease to 30% under the heated inlet air temperature of 303 K. Moreover, the exergy destruction for both Brayton cycle part and Rankine cycle part decrease with the inlet air temperature increasing. The daily fossil fuel will raise up to 2.9 ton/day and to 5.1 ton/day under the power load of 65% and 80%, respectively. The annual economic benefit from energy saving is more than $ 5.88 × 105 and the payback period is less than 3 years.
Shucheng Wang; Zhitan Liu; Rasmus Cordtz; Muhammad Imran; Zhongguang Fu. Performance prediction of the combined cycle power plant with inlet air heating under part load conditions. Energy Conversion and Management 2019, 200, 112063 .
AMA StyleShucheng Wang, Zhitan Liu, Rasmus Cordtz, Muhammad Imran, Zhongguang Fu. Performance prediction of the combined cycle power plant with inlet air heating under part load conditions. Energy Conversion and Management. 2019; 200 ():112063.
Chicago/Turabian StyleShucheng Wang; Zhitan Liu; Rasmus Cordtz; Muhammad Imran; Zhongguang Fu. 2019. "Performance prediction of the combined cycle power plant with inlet air heating under part load conditions." Energy Conversion and Management 200, no. : 112063.
The performance of a 300 kW organic Rankine cycle (ORC) prototype was experimentally investigated for low-grade waste heat recovery in industry. The prototype employed a specially developed single-stage radial turbine that was integrated with a semi-hermetic three-phase asynchronous generator. R245fa was selected as the working fluid and hot water was adopted to imitate the low-grade waste heat source. Under approximately constant cooling source operating conditions, variations of the ORC performance with diverse operating parameters of the heat source (including temperature and volume flow rate) were evaluated. Results revealed that the gross generating efficiency and electric power output could be improved by using a higher heat source temperature and volume flow rate. In the present experimental research, the maximum electric power output of 301 kW was achieved when the heat source temperature was 121 °C. The corresponding turbine isentropic efficiency and gross generating efficiency were up to 88.6% and 9.4%, respectively. Furthermore, the gross generating efficiency accounted for 40% of the ideal Carnot efficiency. The maximum electric power output yielded the optimum gross generating efficiency.
Ruijie Wang; Guohua Kuang; Lei Zhu; Shucheng Wang; Jingquan Zhao. Experimental Investigation of a 300 kW Organic Rankine Cycle Unit with Radial Turbine for Low-Grade Waste Heat Recovery. Entropy 2019, 21, 619 .
AMA StyleRuijie Wang, Guohua Kuang, Lei Zhu, Shucheng Wang, Jingquan Zhao. Experimental Investigation of a 300 kW Organic Rankine Cycle Unit with Radial Turbine for Low-Grade Waste Heat Recovery. Entropy. 2019; 21 (6):619.
Chicago/Turabian StyleRuijie Wang; Guohua Kuang; Lei Zhu; Shucheng Wang; Jingquan Zhao. 2019. "Experimental Investigation of a 300 kW Organic Rankine Cycle Unit with Radial Turbine for Low-Grade Waste Heat Recovery." Entropy 21, no. 6: 619.
An integrated solar combined cycle (ISCC) with a low temperature waste heat recovery system is proposed in this paper. The combined system consists of a conventional natural gas combined cycle, organic Rankine cycle and solar fields. The performance of an organic Rankine cycle subsystem as well as the overall proposed ISCC system are analyzed using organic working fluids. Besides, parameters including the pump discharge pressure, exhaust gas temperature, thermal and exergy efficiencies, unit cost of exergy for product and annual CO2-savings were considered. Results indicate that Rc318 contributes the highest exhaust gas temperature of 71.2℃, while R113 showed the lowest exhaust gas temperature of 65.89 at 800 W/m2, in the proposed ISCC system. The overall plant thermal efficiency increases rapidly with solar radiation, while the exergy efficiency appears to have a downward trend. R227ea had both the largest thermal efficiency of 58.33% and exergy efficiency of 48.09% at 800W/m2. In addition, for the organic Rankine cycle, the exergy destructions of the evaporator, turbine and condenser decreased with increasing solar radiation. The evaporator contributed the largest exergy destruction followed by the turbine, condenser and pump. Besides, according to the economic analysis, R227ea had the lowest production cost of 19.3 $/GJ.
Shucheng Wang; Zhongguang Fu. Thermodynamic Investigation of an Integrated Solar Combined Cycle with an ORC System. Entropy 2019, 21, 428 .
AMA StyleShucheng Wang, Zhongguang Fu. Thermodynamic Investigation of an Integrated Solar Combined Cycle with an ORC System. Entropy. 2019; 21 (4):428.
Chicago/Turabian StyleShucheng Wang; Zhongguang Fu. 2019. "Thermodynamic Investigation of an Integrated Solar Combined Cycle with an ORC System." Entropy 21, no. 4: 428.
A solar assisted combined cooling, heating and power system coupled with an organic Rankine cycle (SCCHP-ORC) is proposed and investigated via both experimental and simulation methods. The dimethyl ether (DME) is used as the fuel of the proposed system for the prime mover (PM) and auxiliary boiler (AB). DME was chosen based on that it is friendly to the environment and avoids low temperature corrosion. The performance of the proposed system was evaluated during typical summer and winter days via a case study using thermodynamic and economic methods. The results show that the proposed system followed by the electricity load (FEL) strategy can satisfy most of the electricity demand. The cooling and heating profiles are supplied by utilizing the PMs’ cooling water and the parabolic trough collector (PTC). Additionally, the released energy from a thermal energy storage (TES) can significantly reduce the need for grid energy during peak load hours. Moreover, the efficiency of the proposed SCCHP-ORC system is higher than that of original system by 9.87%. The minimum values of carbon dioxide emission saving ratio are of 58.14% during summer and 17.32% during winter. The total amount of carbon dioxide saved are 778.7 kg/day during a typical summer day and 358.7 kg/day during a typical winter day duo to the technologies selected in this system. Besides, the sensitivity analysis shows that the changed electricity price has a largest impact on the payback period ranging from 4.0 year to 6.5 year.
Shucheng Wang; Zhongguang Fu. Thermodynamic and economic analysis of solar assisted CCHP-ORC system with DME as fuel. Energy Conversion and Management 2019, 186, 535 -545.
AMA StyleShucheng Wang, Zhongguang Fu. Thermodynamic and economic analysis of solar assisted CCHP-ORC system with DME as fuel. Energy Conversion and Management. 2019; 186 ():535-545.
Chicago/Turabian StyleShucheng Wang; Zhongguang Fu. 2019. "Thermodynamic and economic analysis of solar assisted CCHP-ORC system with DME as fuel." Energy Conversion and Management 186, no. : 535-545.
The variation performance of integrated solar combined cycle (ISCC) is presented using energy, conventional exergy and advanced exergy analysis methods to provide information about exergy destruction of components and efficiencies of overall plant. Moreover, the theory of dividing the exergy destruction of main components into unavoidable/avoidable and exogenous/endogenous parts allows for further understanding the real potentials for improving. Besides, the exergy destruction rate and exergy efficiency of components as well as overall plant were hourly analyzed within a typical day. Results indicate the exergy destruction rate of overall system drops from 49.79% to 44.65% in summer and decreases from 49.79% to 47.59% in winter. As the solar irradiation intensity rises, the solar field efficiency reaches to 42.16% in winter and 47.5% in summer. The solar-to-electric energy efficiency gets to 13.69% in winter and 15.46% in summer. In addition, with the increase of solar energy input to the ISCC system, the exergy destruction of Brayton cycle components decreases; however, the exergy destruction of Rankine cycle components increases. Furthermore, the exergy destruction of solar field has a large extended from 14.55 MW to 58.03 MW. Moreover, the heat recovery steam generator (HRSG) and the steam turbines have the largest exergy destruction rate of 11.26% and 13.63% at 15:00 p.m.
Shucheng Wang; Zhongguang Fu; Gaoqiang Zhang; Tianqing Zhang. Advanced Thermodynamic Analysis Applied to an Integrated Solar Combined Cycle System. Energies 2018, 11, 1574 .
AMA StyleShucheng Wang, Zhongguang Fu, Gaoqiang Zhang, Tianqing Zhang. Advanced Thermodynamic Analysis Applied to an Integrated Solar Combined Cycle System. Energies. 2018; 11 (6):1574.
Chicago/Turabian StyleShucheng Wang; Zhongguang Fu; Gaoqiang Zhang; Tianqing Zhang. 2018. "Advanced Thermodynamic Analysis Applied to an Integrated Solar Combined Cycle System." Energies 11, no. 6: 1574.
Integrating solar thermal energy into the conventional Combined Cycle Power Plant (CCPP) has been proved to be an efficient way to use solar energy and improve the generation efficiency of CCPP. In this paper, the energy, exergy, and economic (3E) methods were applied to the models of the Integrated Solar Combined Cycle System (ISCCS). The performances of the proposed system were not only assessed by energy and exergy efficiency, as well as exergy destruction, but also through varied thermodynamic parameters such as DNI and Ta. Besides, to better understand the real potentials for improving the components, exergy destruction was split into endogenous/exogenous and avoidable/unavoidable parts. Results indicate that the combustion chamber of the gas turbine has the largest endogenous and unavoidable exergy destruction values of 202.23 MW and 197.63 MW, and the values of the parabolic trough solar collector are 51.77 MW and 50.01 MW. For the overall power plant, the exogenous and avoidable exergy destruction rates resulted in 17.61% and 17.78%, respectively. In addition, the proposed system can save a fuel cost of 1.86 $/MW·h per year accompanied by reducing CO2 emissions of about 88.40 kg/MW·h, further highlighting the great potential of ISCCS.
Shucheng Wang; Zhongguang Fu; Sajid Sajid; Tianqing Zhang; Gaoqiang Zhang. Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System. Entropy 2018, 20, 313 .
AMA StyleShucheng Wang, Zhongguang Fu, Sajid Sajid, Tianqing Zhang, Gaoqiang Zhang. Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System. Entropy. 2018; 20 (5):313.
Chicago/Turabian StyleShucheng Wang; Zhongguang Fu; Sajid Sajid; Tianqing Zhang; Gaoqiang Zhang. 2018. "Thermodynamic and Economic Analysis of an Integrated Solar Combined Cycle System." Entropy 20, no. 5: 313.