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Shaohua Wu
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

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Journal article
Published: 17 February 2020 in Energies
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The combined heating and power (CHP) system with turbine-driving fans and pumps is more efficient and economical in meeting heat demand in cold areas, however, there are no detailed studies that investigate its thermodynamic performance, improvement possibilities and economy. In this paper, the energy, exergy and economic analysis of a CHP system with turbine-driving fans and pumps operated in Northeast China were conducted to provide insights into improvement options. It is revealed that the boiler is the main source of exergy destruction, followed by the steam-water heat exchangers (SWHE), temperature and pressure reducer (TPR), turbines, and deaerator. The energy and exergy efficiencies of the system are 89.72% and 10.07%, while the boiler’s are 84.89% and 30.04%. The thermodynamic performance of the boiler and turbines are compared with other studies, and the inefficiencies of major components are analyzed and some advice for further improvement is given. As the reference state changes, the main conclusions stay the same. The turbine-driving mode saves an electricity cost of 16,654.08 yuan on 15 December 2018. The effect of electricity price and on-grid price on the saved daily electricity cost is investigated and it proves that the turbine-driving mode is more economical in China.

ACS Style

Ximei Li; Jianmin Gao; Yaning Zhang; Yu Zhang; Qian Du; Shaohua Wu; Yukun Qin. Energy, Exergy and Economic Analyses of a Combined Heating and Power System with Turbine-Driving Fans and Pumps in Northeast China. Energies 2020, 13, 878 .

AMA Style

Ximei Li, Jianmin Gao, Yaning Zhang, Yu Zhang, Qian Du, Shaohua Wu, Yukun Qin. Energy, Exergy and Economic Analyses of a Combined Heating and Power System with Turbine-Driving Fans and Pumps in Northeast China. Energies. 2020; 13 (4):878.

Chicago/Turabian Style

Ximei Li; Jianmin Gao; Yaning Zhang; Yu Zhang; Qian Du; Shaohua Wu; Yukun Qin. 2020. "Energy, Exergy and Economic Analyses of a Combined Heating and Power System with Turbine-Driving Fans and Pumps in Northeast China." Energies 13, no. 4: 878.

Journal article
Published: 24 September 2019 in Energies
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The comprehensive and quantitative assessment of the contribution of minerals with different occurrence forms to particulate matter with an aerodynamic diameter of less than 10 μm (PM10) emitted from the combustion of Zhundong coal is of great significance for its clean utilization and for the development of particulate matter formation mechanisms. Samples with simplified occurrence forms of inorganic species were prepared by water-, salt-, and acid-washing of Zhundong coal. The samples were combusted in a drop-tube furnace under 20 vol % oxygen at 1250 °C, and the emitted PM10 was collected. The effects of the minerals in different forms on the PM10 emissions were analyzed by comparing the mass concentration distributions, yields, and elemental compositions of PM10. The results showed that water-soluble, ion-exchangeable, acid-soluble, and acid-insoluble minerals contributed 8.3%, 37.8%, 29.7%, and 24.2% of the PM10 emissions, respectively. The distributions of the Na, Mg, Ca, and Fe contents in PM10 were bimodal, as follows: 63.6% of Na and 54.5% of Fe were deported to the ultrafine mode PM, while 63.6% of Mg and 86.6% of Ca were deported to the coarse mode PM. The distributions of the Si and Al contents were unimodal, namely: 92.9% of Si and 90.5% of Al were deported to the coarse mode PM. Water-soluble Na; ion-exchanged Mg, Ca, and Fe; and acid-insoluble Si and Al played decisive roles in the distribution of minerals in PM10.

ACS Style

Laifu Zhao; Qian Du; Jianmin Gao; Shaohua Wu. Contribution of Minerals in Different Occurrence Forms to PM10 Emissions during the Combustion of Pulverized Zhundong Coal. Energies 2019, 12, 3629 .

AMA Style

Laifu Zhao, Qian Du, Jianmin Gao, Shaohua Wu. Contribution of Minerals in Different Occurrence Forms to PM10 Emissions during the Combustion of Pulverized Zhundong Coal. Energies. 2019; 12 (19):3629.

Chicago/Turabian Style

Laifu Zhao; Qian Du; Jianmin Gao; Shaohua Wu. 2019. "Contribution of Minerals in Different Occurrence Forms to PM10 Emissions during the Combustion of Pulverized Zhundong Coal." Energies 12, no. 19: 3629.

Journal article
Published: 15 April 2011 in Journal of Hazardous Materials
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Two different flue gas desulfurization (FGD) ash samples were exposed to a simulated flue gas stream containing elemental mercury vapor to evaluate the interactions and determine the effects of gas components, dry FGD ash samples, and temperature on adsorption and heterogeneous oxidation of mercury. Both samples were characterized for surface area, unburned carbon content, element content, and mineralogical composition. Mercury speciation downstream from the sample was determined using Ontario Hydro Method. Results showed that higher levels of mercury oxidation were associated with higher levels of mercury capture. The NO2, HCl, and Cl2 promoted mercury oxidation, while SO2 and NO had inhibitory effects on mercury oxidation. Unburned carbon of dry FGD ash sample played an important role in mercury capture. Whether the surface area was caused by unburned carbon or by calcium-based sorbents might be more significant than the level of surface area. Extent of mercury oxidation and capture increased slightly and then decreased as the temperature rising due to the interaction of mass transfer and reaction rates control.

ACS Style

Shaohua Wu; Shuai Wang; Jihui Gao; Yanyan Wu; Guoqing Chen; Yuwen Zhu. Interactions between mercury and dry FGD ash in simulated post combustion conditions. Journal of Hazardous Materials 2011, 188, 391 -398.

AMA Style

Shaohua Wu, Shuai Wang, Jihui Gao, Yanyan Wu, Guoqing Chen, Yuwen Zhu. Interactions between mercury and dry FGD ash in simulated post combustion conditions. Journal of Hazardous Materials. 2011; 188 (1-3):391-398.

Chicago/Turabian Style

Shaohua Wu; Shuai Wang; Jihui Gao; Yanyan Wu; Guoqing Chen; Yuwen Zhu. 2011. "Interactions between mercury and dry FGD ash in simulated post combustion conditions." Journal of Hazardous Materials 188, no. 1-3: 391-398.