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Experimental Investigation of Transient Heat Transferin the Once-Through Boiler water separator

Journal of Thermal Science 1997年第1期6卷 44-50页

作者： Yang Dong Chen Tingkuan Zheng Jianxu(National Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an,710049, China) National Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an China

The transient heat transfer between working fluid and inner wall of 600 MW supercritical pressureboiler's water separator model during start-up was experimentally explored. The test conditions forwater steam two-phase were as follows: pressure P = 3 ~ 11 MPa, mass now M = 0.2 ~ 0.35 kg/s,and mass quality x = O.2 ~ 0.8; for subcooled water P = 3 ~ 11 MPa, M = 0.2 ~ 0.35 kg/s, andsubcooled degree △θ = 10℃. By using an accurate and tractable inverse heat conduction solution,the correlations of single phase and twouphase transient heat transfer coefficients were obtained. Theexperimental results demonstrated the heat transfer enhanced for subcooled water and water steammixture compared with fully developed turbulent flow in tube. The increasing heat transfer effect maybe attributed to the deformation or destruction f the boundary layer.

关键词： experimental investigation water separator inverse heat conduction transient heat transfer

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Cost-optimized Cathode Air and Exhaust Paths

Cost-optimized Cathode Air and Exhaust Paths

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2020中国汽车工程学会年会暨展览会

作者： Harenbrock Michael Hallbauer Eva Korn Alexander Wang Terry Weber Andreas MANA+HUMMEL GmbH2. MANA+HUMMEL Innenraumfilter GmbH & Co.KG3. MANN+HUMMEL Filter(Shanghai) Co.Ltd.

Reducing transport-related CO emissions is necessary to limit global *** Exchange Membrane(PEM) fuel cell technology offers an attractive alternative to advanced Internal Combustion Engine Vehicle(ICEV) solutions and electrified powertrains using traction batteries,especially in the segment of commercial *** technology maturity has been achieved,cost reductions in the stack,but also in the balance-of-plant components must be reached.A promising approach is to transfer air management components from ICEV technology to Fuel Cell Electric Vehicles(FCEV).Fuel cell-specific components like cathode air filters adsorbing harmful airborne contamination and gas-to-gas humidifiers can be integrated into the cathode air *** the exhaust temperature in PEM fuel cell systems is much lower compared to ICEV,cost-efficient plastic technology can contribute to overall cost savings.

关键词： PEM fuel cell cathode air filter water separator cathode air management acoustics cathode exhaust path

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