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Thermo-economic Investigation of an Enhanced Geothermal System Organic Rankine Cycle and Combined Heating and Power System

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Acta Geologica Sinica(English Edition) 2021年第6期95卷 1958-1966页

作者： WANG lingbao BU Xianbiao li huashan Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China CAS Key Laboratory of Renewable Energy Guangzhou 510640China

As a potentially viable renewable energy, Enhanced Geothermal Systems(EGSs) extract heat from hot dry rock(HDR) reservoirs to produce electricity and heat, which promotes the progress towards carbon peaking and carbon neutralization. The main challenge for EGSs is to reduce the investment cost. In the present study, thermo-economic investigations of EGS projects are conducted. The effects of geofluid mass flow rate, wellhead temperature and loss rate on the thermo-economic performance of the EGS organic Rankine cycle(ORC) are studied. A performance comparison between EGS-ORC and the EGS combined heating and power system(CHP) is presented. Considering the CO_(2)emission reduction benefits, the influence of carbon emission trading price on the levelized cost of energy(LCOE) is also presented. It is indicated that the geofluid mass flow rate is a critical parameter in dictating the success of a project. Under the assumed typical working conditions, the LCOE of EGS-ORC and EGS-CHP systems are 24.72 and 16.1 cents/k Wh, respectively. Compared with the EGS-ORC system, the LCOE of the EGS-CHP system is reduced by 35%. EGS-CHP systems have the potential to be economically viable in the future. With carbon emission trading prices of 12.76 USD/ton, the LCOE can be reduced by approximately 8.5%.

关键词： enhanced geothermal system organic Rankine cycle combined heating and power system thermo-economic investigation carbon emission reduction

Preparation of Ammonia Adsorbent by Carbonizing and Activating Mixture of Biomass Material and Hygroscopic Salt

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Journal of Wuhan University of Technology(Materials Science) 2015年第2期30卷 271-275页

作者：龙臻卜宪标 LU Zhenneng li huashan MA Weibin Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences University of Chinese Academy of Sciences

We put forward a new and ingenious method for the preparation of a new adsorbent by soaking, carbonizing and activating the mixture of hygroscopic salt and biomass material. The new adsorbent has high porosity, uniform distribution and high content of Ca Cl2, and exhibits high adsorption performance. The ammonia uptake and specific cooling power（SCP） at 5 min adsorption time can reach as high as 0.19 g·g^-1 and 793.9 W·kg^-1, respectively. The concept of utilizing the biomass materials and hygroscopic salts as raw materials for the preparation of adsorbents is of practical interest with respect to the potential quantity of biomass materials around the world, indicating that there would be a new market for biomass *** words： biomass material; adsorption system; ammonia; calcium chloride; activated carbon

关键词： biomass material adsorption system ammonia calcium chloride activated carbon

Thermo-Economic Performance of Geothermal Driven High-Temperature Flash Tank Vapor Injection Heat Pump System:A Comparison Study

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Energy Engineering 2023年第8期120卷 1817-1835页

作者： huashan li Xiaoshuang Zhao Sihao Huang lingbao Wang Jiongcong Chen Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China University of Chinese Academy of Sciences Beijing100049China

Process heating constitutes a significant share of final energy consumption in the industrial sector around the *** this paper,a high-temperature heat pump(HTHP)using flash tank vapor injection technology(FTVI)is proposed to develop low-temperature geothermal source for industrial process heating with temperature above 100°*** heat sink output temperatures between 120°C and 150°C,the thermo-economic performance of the FTVI HTHP system using R1234ze(Z)as refrigerant is analyzed and also compared to the single-stage vapor compression(SSVC)system by employing the developed mathematical *** coefficient of performance(COP),exergy efficiency(ηexe),net present value(NPV)and payback period(PBP)are used as performance *** results show that under the typical working conditions,the COP andηexe of FTVI HTHP system are 3.00 and 59.66%,respectively,and the corresponding NPV and PBP reach 8.13×106 CNY and 4.13 years,*** the high-temperature heating conditions,the thermo-economic performance of the FTVI HTHP system is significantly better than that of the SSVC system,and the larger the temperature lift,the greater the thermo-economic advantage of the FTVI HTHP ***,the FTVI HTHP system is more capable than the SSVC system in absorbing the financial risks associated with changes of electricity price and natural gas price.

关键词： Geothermal water high-temperature heat pump flash tank vapor injection thermo-economic performance

Metallurgical properties of CaO–SiO_(2)–Al_(2)O_(3)–4.6wt%MgO–Fe_(2)O_(3)slag system pertaining to spent automotive catalyst smelting

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 886-896页

作者： Ruili Zheng Jianfang Lü Weifeng Song Mudan liu huashan li Yong liu Xianjin Lü Zhiyuan Ma School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China Institute of Resources Utilization and Rare Earth Development Guangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Rare Metals Separation and Comprehensive Utilization Guangzhou 510650China Guangdong Key Laboratory of Mineral Resources Development and Comprehensive Utilization Guangzhou 510650China

The metallurgical properties of the CaO–SiO_(2)–Al_(2)O_(3)–4.6wt%Mg O–Fe_(2)O_(3)slag system,formed by the co-treatment process of spent automotive catalyst(SAC)and copper-bearing electroplating sludge(CBES),were studied systematically in this *** slag structure,melting temperature,and viscous characteristics were investigated by Fourier transform infrared(FTIR)spectroscopy,Raman spectroscopy,Fact Sage calculation,and viscosity *** results show that the increase of Fe_(2)O_(3)content(3.8wt%–16.6wt%),the mass ratio of CaO/SiO_(2)(m(CaO)/m(SiO_(2)),0.5–1.3),and the mass ratio of SiO_(2)/Al_(2)O_(3)(m(SiO_(2))/m(Al_(2)O_(3)),1.0–5.0)can promote the depolymerization of silicate network,and the presence of a large amount of Fe_(2)O_(3)in form of tetrahedral and octahedral units ensures the charge compensation of Al^(3+)ions and makes Al_(2)O_(3)only behave as an acid *** calculation and viscosity measurements show that with the increase of Fe_(2)O_(3)content,m(Ca O)/m(SiO_(2)),and m(SiO_(2))/m(Al_(2)O_(3)),the depolymerization of silicate network structure and low-melting-point phase transformation first occur within the slag,leading to the decrease in melting point and viscosity of the slag,while further increase causes the formation of high-melting-point phase and a resultant re-increase in viscosity and melting *** on experimental analysis,the preferred slag composition with low polymerization degree,viscosity,and melting point is as follows:Fe_(2)O_(3)content of 10.2wt%–13.4wt%,m(CaO)/m(SiO_(2))of 0.7–0.9 and m(SiO_(2))/m(Al_(2)O_(3))of 3.0–*** work provides a theoretical support for slag design in co-smelting process of SAC and CBES.

关键词： spent automotive catalyst co-treatment slag system slag structure melting temperature phase transformation viscosity

Assessment of Low Global Warming Potential Refrigerants for Waste Heat Recovery in Data Center with On-Chip Two-Phase Cooling Loop

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Frontiers in Heat and Mass Transfer 2024年第4期22卷 1171-1188页

作者： Yuming Zhao Jing Wang Bin Sun Zhenshang Wang huashan li Jiongcong Chen Shenzhen Power Supply Bureau Co. Ltd.Shenzhen518020China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China

Data centers(DCs)are highly energy-intensive facilities,where about 30%–50%of the power consumed is attributable to the cooling of information technology *** makes liquid cooling,especially in twophase mode,as an alternative to air cooling for the microprocessors in servers of *** need to meet the increased power density of server racks in high-performance DCs,along with the push towards lower global warming potential(GWP)refrigerants due to environmental concerns,has motivated research on the selection of two-phase heat transfer fluids for cooling servers while simultaneously recovering waste *** this regard,a heat pump-assisted absorption chiller(HPAAC)system for recovering waste heat in DCs with an on-chip twophase cooling loop driven by the compressor is proposed in the present paper and the low GWP hydrofluoroolefin refrigerants,including R1224yd(Z),R1233zd(E),R1234yf,R1234ze(E),R1234ze(Z),R1243zf and R1336mzz(Z),are evaluated and compared against R245fa as server *** theHPAAC system,beginning with the development of energy and economic models,the performance is analyzed through both a parametric study and optimization using the coefficient of performance(COP),energy saving ratio(ESR),payback period(PBP)and net present value(NPV)as thermo-economic *** a standard vapor compression cooling system as a benchmark,the results indicate that with the evaporation temperature between 50℃and 70℃and the subcooling degree ranging from5℃to 15°C,R1233zd(E)with moderate compressor suction pressure and pressure ratio is the best refrigerant for the HPAAC systemwhile R1234yf performs the *** importantly,R1233zd(E)is also superior to R245fa based on thermo-economic performance,especially under work conditions with relatively lower evaporation temperature as well as subcooling *** the given working conditions,the overall COP,ESR,NPV,and PBP of R1233zd(E)HPAAC with optimum subcooling degree range from4.99 to 11.27,25.5

关键词： Heat pump absorption chiller waste heat recovery two-phase cooling loop

Composite adsorbents of CaCI2 and sawdust prepared by carbonization for ammonia adsorption refrigeration

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Frontiers in Energy 2012年第4期6卷 356-360页

作者： huashan li Xianbiao BU lingbao WANG Zhenneng LU Weibin MA Key Laboratory of Renewabie Energyand Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Graduate University of Chinese Academyof Sciences Beijing 100049China Key Laboratory of Renewable Energy and Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China

Composite adsorbents of CaC12 and sawdust prepared by carbonization for adsorption refrigeration with NH3 as refrigerant are tested, and the effects of carboniza tion temperature on the sorption capacity and rate are analyzed. The results show that the amount of pores in the sawdust of the composite adsorbents carbonized, apart from the content of CaCI2, is the most dominant factor influencing the NH3 sorption on composite adsorbents. The optimum carbonization temperature is 700℃, which gives the maximal NH3 sorption capacity as high as 0.774 kg of NH3 per kg of the composite, and the specific cooling power is approximately between 338 and 869 W/kg with the cycle duration varying from 5 to 20 minutes. The present study demonstrates that the composite absorbent of CaC12 and sawdust prepared by carbonization is more promising and competitive for adsorption refrigeration application.

关键词： Keywords adsorption refrigeration composite adsorbent,calcium chloride sawdust carbonization

Analysis of Solar Direct-Driven Organic Rankine Cycle Powered Vapor Compression Cooling System Combined with Electric Motor for Office Building Air-Conditioning

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Energy Engineering 2021年第1期118卷 89-101页

作者： Xiang Xiao Wei Zhao Wei Wang Wei Zhang Xianbiao Bu lingbao Wang huashan li Electric Power Research Institute of Guangdong Power Grid Co. Ltd.Guangzhou510640China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China

Solar energy powered organic Rankine cycle vapor compression cycle(ORC-VCC)is a good alternative to convert solar heat into a cooling *** this study,an ORC-VCC system driven by solar energy combined with electric motor is proposed to ensure smooth operation under the conditions that solar radiation is unstable and discontinuous,and an office building located in Guangzhou,China is selected as a case *** results show that beam solar radiation and generation temperature have considerable effects on the system *** is an optimal generation temperature at which the system achieves optimum ***,as a key indicator,the cooling power per square meter collector should be considered in the hybrid solar cooling system in design *** to the vapor compression cooling system,the hybrid cooling system can save almost 68.23%of electricity consumption.

关键词： Solar cooling organic Rankine cycle vapor compression cycle hybrid solar cooling system office building air-conditioning

Thyroid-stimulating hormone-thyroid hormone signaling contributes to circadian regulation through repressing clock2/npas2 in zebrafish

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Journal of Genetics and Genomics 2024年第1期51卷 61-74页

作者： Cheng Ji Yue Ou Wangjianfei Yu Jiaxin Lv Fanmiao Zhang huashan li Zeyun Gu Jiayuan li Zhaomin Zhong Han Wang Center for Circadian Clocks Soochow UniversitySuzhouJiangsu 215123China School of Biology and Basic Medical Sciences Suzhou Medical CollegeSoochow UniversitySuzhouJiangsu 215123China

Thyroid-stimulating hormone(TSH)is important for the thyroid gland,development,growth,and *** in TSH production or the thyrotrope cells within the pituitary gland cause congenital hypothyroidism(CH),resulting in growth retardation and neurocognitive *** human TSH is known to display rhythmicity,the molecular mechanisms underlying the circadian regulation of TSH and the effects of TSH-thyroid hormone(TH)signaling on the circadian clock remain *** we show that TSH,thyroxine(T4),triiodothyronine(T3),and tshba display rhythmicity in both larval and adult zebrafish and tshba is regulated directly by the circadian clock via both E′-box and *** tshba^(−/−)mutants manifest congenital hypothyroidism,with the characteristics of low levels of T_(4)and T_(3)and growth *** or overexpression of tshba alters the rhythmicity of locomotor activities and expression of core circadian clock genes and hypothalamic-pituitary-thyroid(HPT)axis-related ***,TSH-TH signaling regulates clock2/npas2 via the thyroid response element(TRE)in its promoter,and transcriptome analysis reveals extensive functions of Tshba in ***,our results demonstrate that zebrafish tshba is a direct target of the circadian clock and in turn plays critical roles in circadian regulation along with other functions.

关键词： Thyroid-stimulating hormone subunitβa (tshba) Thyroid hormone Circadian rhythm TALEN Zebrafish

Experimental demonstration of a fast calibration method for integrated photonic circuits with cascaded phase shifters

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Chinese Physics B 2022年第11期31卷 329-335页

作者： Junqin Cao Zhixin Chen Yaxin Wang Tianfeng Feng Zhihao li Zeyu Xing huashan li Xiaoqi Zhou School of Physics and State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510000China

With the development of research on integrated photonic quantum information processing,the integration level of the integrated quantum photonic circuits has been increasing continuously,which makes the calibration of the phase shifters on the chip increasingly *** the calibration of multiple cascaded phase shifters that is not easy to be decoupled,the resources consumed by conventional brute force methods increase exponentially with the number of phase shifters,making it impossible to calibrate a relatively large number of cascaded phase *** this work,we experimentally validate an efficient method for calibrating cascaded phase shifters that achieves an exponential increase in calibration efficiency compared to the conventional method,thus solving the calibration problem for multiple cascaded phase ***,we experimentally calibrate an integrated quantum photonic circuit with nine cascaded phase shifters and achieve a high-precision calibration with an average fidelity of 99.26%.

关键词： cascaded phase shifters calibration quantum photonic chip