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您的检索式：作者名="Mostafa Mafi"
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| 1 | Introducing a proper hydrogen liquefaction concept for using wasted heat of thermal power plants-case study: Parand gas power plant显示文摘A hydrogen liquefaction concept with an innovative configuration and a capacity of 4 kg·s^(-1)(345.6 t·d^(-1))is developed.The concept involves an ammonia absorption refrigeration system for the pre-cooling of hydrogen and MR streams from 25℃ to-30℃.The ammonia absorption refrigeration system is fed by exhaust gases of the Pa rand gas power plant that are normally dissipated to the environment with a temperature of 546℃.The simulation is performed by Aspen HYSYS V9.0,using two separate equations of state for simulating hydrogen and MR streams to gain more accurate results especially for ortho-para conversion.Results show that conversion enthalpy estimated by Aspen HYSYS,fits very well to the experimental data.Determining the important independent variables and composition of MRs are done using trial and error procedure,a functional and straightforward method for complicated systems.The minimum temperature limit in the cooling section is lowered,and an ortho-para converter is implemented in this section.The proposed concept performs well from energy aspects and leads to COP and SEC equal to 0.271 and 4.54 kW·h·kg^(-1),respectively.The main advantage of this study is in the low SEC,eliminating the losses of the distribution network,and improving the ability of the hydrogen liquefaction for energy storage in off-peak times. | Hamed Rezaie Azizabadi Masoud Ziabasharhagh Mostafa Mafi | 2021 | Chinese Journal of Chemical Engineering2021，34，12： | 1 |
| 2 | Characterization of Yb-doped ZBLAN fiber as a platform for radiation-balanced lasers显示文摘Recent advances in power scaling of fiber lasers are hindered by the thermal issues,which deteriorate the beam quality.Anti-Stokes fluorescence cooling has been suggested as a viable method to balance the heat generated by the quantum defect and background absorption.Such radiation-balanced configurations rely on the availability of cooling-grade rare-earth-doped gain materials.Herein,we perform a series of tests on an ytterbium-doped ZrF4–BaF2–LaF3–AlF3–Na F(ZBLAN)optical fiber to extract its laser-cooling-related parameters and show that it is a viable laser-cooling medium for radiation balancing.In particular,a detailed laser-induced modulation spectrum test is performed to highlight the transition of this fiber to the cooling regime as a function of the pump laser wavelength.Numerical simulations support the feasibility of a radiation-balanced laser,but they highlight that practical radiation-balanced designs are more demanding on the fiber material properties,especially on the background absorption,than solid-state laser-cooling experiments. | MOSTAFA PEYSOKHAN ESMAEIL MOBINI ARMAN ALLAHVERDI BEHNAM ABAIE ARASH MAFI | 2020 | Photonics Research2020，8，2： | 0 |
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