Due to concerns regarding fuel consumption and environmental issues arising from the use of elastomers, particularly in the automobile industry, we investigated the strategy of fabricating elastomers based on the biogenic β-myrcene and styrene using living anionic polymerization and successfully cross-linked these elastomers with sulfur. Furthermore, the dynamic viscoelastic and mechanical behaviors of these cured elastomers were investigated. Amazingly, the damping factor (tan δ) of the homopolymer of β-myrcene increased to 2.8 and exhibited a good damping potential. In addition, the satisfying wet skid resistance and rolling resistance performance were obtained for the copolymer with styrene. Meanwhile, the tensile strength and elongation at break of the copolymer were approximately 1.4 MPa and 230%, respectively. Moreover, the mechanical performance of the copolymer was distinctly improved after reinforcement with carbon black or silica. In particular, the tensile strength of copolymers filled with 30 phr carbon black or silica increased by 220–378%. On the basis of preliminary results, we believe that the elastomer with biogenic myrcene is a versatile and outstanding candidate future elastomer material.
Solar aided coal-fired power system has been proven to be a promising way to utilise solar energy in large scale. In this paper, the performances of the solar tower aided coal-fired power (STACP) system at 100% load, 75% load, and 50% load for different days are investigated and the maximum solar power that the boiler can absorb under different plant loads are explored. Then, the effects of solar multiple (SM) and the thermal energy storage (TES) hour on the daily performance of STACP system are investigated. Results show that the maximum solar power that a 600 MWe boiler can absorb at 100% load, 75% load and 50% load are 76.4 MWth, 54.2 MWth and 23.0 MWth, respectively. Due to the augmented energy from the solar field, the maximum standard coal consumption rate is reduced by 13.53 g/kWh, 12.81 g/kWh and 8.22 g/kWh at 100% load, 75% load and 50% load, respectively. With an increase of solar power input, the boiler efficiency, overall system efficiency and solar thermal-to-electricity efficiency shown a downward trend. . Please refer to any applicable publisher terms of use.the daily coal consumption of summer solstice is the lowest while the winter solstice is the highest for a particular SM and TES hour. Nomenclature Abbreviations CSPConcentrated solar power ECO Economizer FPS First platen super-heater FS Final super-heater HP High pressure turbine HR High temperature re-heater IP Intermediate pressure turbine LP Low pressure turbine LR Low-temperature re-heater MSHE Molten salt heat exchanger SACP Solar aided coal-fired power system SEP Steam separator SM Solar multiple SPS Second platen super-heater STACP Solar tower aided coal-fired power system TES Thermal energy storage Greek Symbols α solar absorptance γi specific enthalpy drop of drain water in the ith heater, kJ/kg ∆Texg temperature difference between the assumed and calculated temperature of the exit flue gas, K ∆tFPS,in temperature difference between the assumed and calculated inlet temperature of FPS, ℃ ∆Thotair temperature difference between the assumed and calculated temperature of hot air, K ∆TLMTD logarithmic mean temperature difference, K ∆tSEP,out temperature difference between the assumed and calculated outlet temperature of SEP, ℃ ∆α air leakage ratio δQboiler heat difference between the assumed and calculated Qboiler, kJ/kg ε hemispherical emittance ηboiler boiler's thermal efficiency ηhel heliostat efficiency ηsolar solar thermal-to-electricity efficiency ηSTACP thermal efficiency of STACP system λ thermal conductivity of molten salt, W/(m K) ρ density of molten salt, kg/m 3 ρ CO 2 density of CO2, kg/m 3 σ0 Stefan-Boltzmann constant, 5.67×10 -8 W/(m 2 K 4 ) τi specific enthalpy change of feed-water in the ith heater, kJ/kg φ heat retention factor Mathematical Symbols Ah area of heating surface, m 2 Ahel area of a heliostat, m 2 Ar lateral surface of the tube, m 2 axt system emissivity Bj calculation coal consumption rate, kg/s bs standard coal consumption rate, kg/kWh cp specific heat of molten salt at constant pressure, J/(kg K) DNI direct ...
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