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CGE model-based analysis of the neutralized hybrid carbon policy and its decomposed effects on economic growth,carbon reduction,and energy utilization costs 被引量:7
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作者 Rui Sun Dan Kuang 《Chinese Journal of Population,Resources and Environment》 2015年第1期43-54,共12页
The hybrid policy is a flexible policy tool that combines features of carbon trading and carbon taxation.Its economic and environmental effects under China's background are still not studied in detail.Given the ex... The hybrid policy is a flexible policy tool that combines features of carbon trading and carbon taxation.Its economic and environmental effects under China's background are still not studied in detail.Given the exogenous carbon reduction targets,carbon prices,and carbon tax-rates,by computable general equilibrium modeling methods and factor decomposition methods,this article investigates direct and cascaded effects of the hybrid policy on economic growth,energy utilization,and carbon emission on the national level and the sector level,with China's national input-output data-set.Stepwisely,policy scenarios with irrational estimated results are selectively excluded based on comprehensive evaluation among economic,carbon reduction and other policy targets.As a result,against national economic conditions in 2007,the hybrid policy,with a carbon reduction target of -10%,a carbon tax-rate of around $10,and a ceiling carbon price of $40,is highly recommended,because of its significant lower economic loss,lower energy utilization cost,and practical robustness against fluctuation of energy market and carbon market.Furthermore,by decomposition analysis,carbon reduction-related costs are decomposed into a direct part that includes carbon allowance price and carbon tax,and an indirect part as the energy price incremental induced by direct carbon costs.Gross carbon reduction may be decomposed into three parts such as energy intensity,economic scale,and technical progress.And,carbon taxation is the main policy tool that stimulates to improve the energy efficiency. 展开更多
关键词 hybrid POLICY CGE modeling CARBON TAXATION CARBON TRADING energy utilization cost
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Integration of Low-level Waste Heat Recovery and Liquefied Nature Gas Cold Energy Utilization 被引量:16
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作者 白菲菲 张早校 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第1期95-99,共5页
Two novel thermal cycles based on Brayton cycle and Rankine cycle are proposed, respectively, which integrate the recovery of low-level waste heat and Liquefied Nature Gas (LNG) cold energy utilization for power gen... Two novel thermal cycles based on Brayton cycle and Rankine cycle are proposed, respectively, which integrate the recovery of low-level waste heat and Liquefied Nature Gas (LNG) cold energy utilization for power generation. Cascade utilization of energy is realized in the two thermal cycles, where low-level waste heat,low-temperature exergy and pressure exergy of LNG are utilized efficiently through the system synthesis. The simulations are carried out using the commercial Aspen Plus 10.2, and the results are analyzed. Compared with the conventional Brayton cycle and Rankine cycle, the two novel cycles bring 60.94% and 60% in exergy efficiency, respectively and 53.08% and 52.31% in thermal efficiency, respectively. 展开更多
关键词 recovery of low-level waste heat LNG cold energy utilization power generation cascade utilization
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Clean Processing and Utilization of Coal Energy 被引量:4
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作者 陈清如 王海锋 《过程工程学报》 EI CAS CSCD 北大核心 2006年第3期507-511,共5页
The dominant status of coal on the energy production and consumption structure of China will not be changed in the middle period of this century. To realize highly efficient utilization of coal,low pollution and low c... The dominant status of coal on the energy production and consumption structure of China will not be changed in the middle period of this century. To realize highly efficient utilization of coal,low pollution and low cost are great and impendent tasks. These difficult problems can be almost resolved through establishing large-scale pithead power stations using two-stage highly efficient dry coal-cleaning system before coal burning,which is a highly efficient,clean and economical strategy considering the current energy and environmental status of China. All these will be discussed in detail in this paper. 展开更多
关键词 COAL clean processing dry beneficiation SEPARATOR energy utilization
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Improving energy utilization efficiency of electrical discharge milling in titanium alloys machining 被引量:3
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作者 郭成波 韦东波 狄士春 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第10期2550-2557,共8页
Electrical discharge milling(ED-milling) can be a good choice for titanium alloys machining and it was proven that its machining efficiency can be improved to compete with mechanical cutting. In order to improve energ... Electrical discharge milling(ED-milling) can be a good choice for titanium alloys machining and it was proven that its machining efficiency can be improved to compete with mechanical cutting. In order to improve energy utilization efficiency of ED-milling process, unstable arc discharge and stable arc discharge combined with normal discharge were implemented for material removal by adjusting servo control strategy. The influence of electrode rotating speed and dielectric flushing pressure on machining performance was investigated by experiments. It was found that the rotating of electrode could move the position of discharge plasma channel, and high pressure flushing could wash melted debris out the discharge gap effectively. Both electrode rotating motion and high pressure flushing are contributed to the improvement of machining efficiency. 展开更多
关键词 electrical discharge milling electrode rotating dielectric flushing energy utilization efficiency material removal rate tool electrode wearing rate
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Optimal Design of Water Utilization Network with Energy Integration in Process Industries 被引量:6
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作者 都健 孟小琼 +3 位作者 杜红彬 俞红梅 樊希山 姚平经 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2004年第2期247-255,共9页
Effective utilization of water and energy is the key factor of sustainable development in process industries, and also an important science and technology problem to be solved in systems engineering. In this paper,two... Effective utilization of water and energy is the key factor of sustainable development in process industries, and also an important science and technology problem to be solved in systems engineering. In this paper,two new methods of optimal design of water utilization network with energy integration in process industries are presented, that is, stepwise and simultaneous optimization methods. They are suitable for both single contaminant and multi-contaminant systems, and the integration of energy can be carried out in the whole process system, not only limited in water network, so that energy can be utilized effectively. The two methods are illustrated by case study. 展开更多
关键词 utilization of water and energy MINIMIZATION stepwise optimization method simultaneous optimization method
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A Novel Process for Natural Gas Liquids Recovery from Oil Field Associated Gas with Liquefied Natural Gas Cryogenic Energy Utilization 被引量:6
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作者 边海军 徐文东 +1 位作者 李秀喜 钱宇 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第3期452-461,共10页
A novel process to recovery natural gas liquids from oil field associated gas with liquefied natural gas (LNG)cryogenic energy utilization is proposed.Compared to the current electric refrigeration process,the propose... A novel process to recovery natural gas liquids from oil field associated gas with liquefied natural gas (LNG)cryogenic energy utilization is proposed.Compared to the current electric refrigeration process,the proposed process uses the cryogenic energy of LNG and saves 62.6%of electricity.The proposed process recovers ethane, liquid petroleum gas(propane and butane)and heavier hydrocarbons,with total recovery rate of natural gas liquids up to 96.8%.In this paper,exergy analysis and the energy utilization diagram method(EUD)are used to assess the new process and identify the key operation units with large exergy loss.The results show that exergy efficiency of the new process is 44.3%.Compared to the electric refrigeration process,exergy efficiency of the new process is improved by 16%.The proposed process has been applied and implemented in a conceptual design scheme of the cryogenic energy utilization for a 300 million tons/yr LNG receiving terminal in a northern Chinese harbor. 展开更多
关键词 liquefied natural gas utilization of cryogenic energy recovery of natural gas liquids exergy analysis
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Technological advancement and industrialization path of Sinopec in carbon capture,utilization and storage,China
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作者 Yang Li Rui Wang +1 位作者 Qingmin Zhao Zhaojie Xue 《Energy Geoscience》 EI 2024年第1期204-211,共8页
Carbon capture,utilization and storage(CCUS)technology is an important means to effectively reduce carbon emissions from fossil energy combustion and industrial processes.With the crisis of climate change,CCUS has att... Carbon capture,utilization and storage(CCUS)technology is an important means to effectively reduce carbon emissions from fossil energy combustion and industrial processes.With the crisis of climate change,CCUS has attracted increasing attention in the world.CCUS technology as developed rapidly in China is technically feasible for large-scale application in various industries.The R&D and demonstration of CCUS in China Petroleum&Chemical Corporation(Sinopec)are summarized,including carbon capture,carbon transport,CO_(2)enhanced energy recovery(including oil,gas,and water,etc.),and comprehensive utilization of CO_(2).Based on the source-sink matching characteristics in China,two CCUS industrialization scenarios are proposed,namely,CO_(2)-EOR,CO_(2)-driven enhanced oil recovery using centralized carbon sinks in East China and CO_(2)-EWR,CO_(2)-driven enhanced water recovery(EWR)using centralized carbon sources from the coal chemical industry in West China.Finally,a CCUS industrialization path from Sinopec's perspective is suggested,using CO_(2)-EOR as the major means and CO_(2)-EWR,CO_(2)-driven enhanced gas recovery(CO_(2)-EGR)and other utilization methods as important supplementary means. 展开更多
关键词 Carbon capture TRANSPORT Enhanced energy recovery Comprehensive utilization Industrialization path
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Dietary supplementation with xylooligosaccharides and exogenous enzyme improves milk production,energy utilization efficiency and reduces enteric methane emissions of Jersey cows 被引量:2
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作者 Lifeng Dong Lei Zhao +5 位作者 Bowei Li Yanhua Gao Tianhai Yan Peter Lund Zhuofan Liu Qiyu Diao 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第6期2514-2524,共11页
Background Sustainable strategies for enteric methane(CH_(4))mitigation of dairy cows have been extensively explored to improve production performance and alleviate environmental pressure.The present study aimed to in... Background Sustainable strategies for enteric methane(CH_(4))mitigation of dairy cows have been extensively explored to improve production performance and alleviate environmental pressure.The present study aimed to investigate the effects of dietary xylooligosaccharides(XOS)and exogenous enzyme(EXE)supplementation on milk production,nutrient digestibility,enteric CH_(4) emissions,energy utilization efficiency of lactating Jersey dairy cows.Forty-eight lactating cows were randomly assigned to one of 4 treatments:(1)control diet(CON),(2)CON with 25 g/d XOS(XOS),(3)CON with 15 g/d EXE(EXE),and(4)CON with 25 g/d XOS and 15 g/d EXE(XOS+EXE).The 60-d experimental period consisted of a 14-d adaptation period and a 46-d sampling period.The enteric CO_(2)and CH_(4) emissions and O2 consumption were measured using two GreenFeed units,which were further used to determine the energy utilization efficiency of cows.Results Compared with CON,cows fed XOS,EXE or XOS+EXE significantly(P<0.05)increased milk yield,true protein and fat concentration,and energy-corrected milk yield(ECM)/DM intake,which could be reflected by the significant improvement(P<0.05)of dietary NDF and ADF digestibility.The results showed that dietary supplementation of XOS,EXE or XOS+EXE significantly(P<0.05)reduced CH_(4) emission,CH_(4)/milk yield,and CH_(4)/ECM.Furthermore,cows fed XOS demonstrated highest(P<0.05)metabolizable energy intake,milk energy output but lowest(P<0.05)of CH_(4) energy output and CH_(4) energy output as a proportion of gross energy intake compared with the remaining treatments.Conclusions Dietary supplementary of XOS,EXE or combination of XOS and EXE contributed to the improvement of lactation performance,nutrient digestibility,and energy utilization efficiency,as well as reduction of enteric CH_(4) emissions of lactating Jersey cows.This promising mitigation method may need further research to validate its long-term effect and mode of action for dairy cows. 展开更多
关键词 energy utilization efficiency Enteric methane emissions Exogenous enzyme Jersey cows XYLOOLIGOSACCHARIDES
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An Integrated Framework for Geothermal Energy Storage with CO_(2)Sequestration and Utilization 被引量:2
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作者 Yueliang Liu Ting Hu +7 位作者 Zhenhua Rui Zheng Zhang Kai Du Tao Yang Birol Dindoruk Erling Halfdan Stenby Farshid Torabi Andrey Afanasyev 《Engineering》 SCIE EI CAS CSCD 2023年第11期121-130,共10页
Subsurface geothermal energy storage has greater potential than other energy storage strategies in terms of capacity scale and time duration.Carbon dioxide(CO_(2))is regarded as a potential medium for energy storage d... Subsurface geothermal energy storage has greater potential than other energy storage strategies in terms of capacity scale and time duration.Carbon dioxide(CO_(2))is regarded as a potential medium for energy storage due to its superior thermal properties.Moreover,the use of CO_(2)plumes for geothermal energy storage mitigates the greenhouse effect by storing CO_(2)in geological bodies.In this work,an integrated framework is proposed for synergistic geothermal energy storage and CO_(2)sequestration and utilization.Within this framework,CO_(2)is first injected into geothermal layers for energy accumulation.The resultant high-energy CO_(2)is then introduced into a target oil reservoir for CO_(2)utilization and geothermal energy storage.As a result,CO_(2)is sequestrated in the geological oil reservoir body.The results show that,as high-energy CO_(2)is injected,the average temperature of the whole target reservoir is greatly increased.With the assistance of geothermal energy,the geological utilization efficiency of CO_(2)is higher,resulting in a 10.1%increase in oil displacement efficiency.According to a storage-potential assessment of the simulated CO_(2)site,110 years after the CO_(2)injection,the utilization efficiency of the geological body will be as high as 91.2%,and the final injection quantity of the CO_(2)in the site will be as high as 9.529×10^(8)t.After 1000 years sequestration,the supercritical phase dominates in CO_(2)sequestration,followed by the liquid phase and then the mineralized phase.In addition,CO_(2)sequestration accounting for dissolution trapping increases significantly due to the presence of residual oil.More importantly,CO_(2)exhibits excellent performance in storing geothermal energy on a large scale;for example,the total energy stored in the studied geological body can provide the yearly energy supply for over 3.5×10^(7) normal households.Application of this integrated approach holds great significance for large-scale geothermal energy storage and the achievement of carbon neutrality. 展开更多
关键词 Geothermal energy storage CO_(2)sequestration Carbon neutrality LARGE-SCALE CO_(2)utilization
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Integrated utilization of low-grade thermal energy in hot coal mine 被引量:1
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作者 Wei-min CHENG Yu-dong QI +1 位作者 Yan-bin YU Gang PAN 《Journal of Coal Science & Engineering(China)》 2013年第1期26-32,共7页
This paper explores the integrated utilization of low-grade thermal energy in hot coal mines, based on analysis of original heating, refrigerating, mine draining, bath draining and air exhaust systems, and in combinat... This paper explores the integrated utilization of low-grade thermal energy in hot coal mines, based on analysis of original heating, refrigerating, mine draining, bath draining and air exhaust systems, and in combination with the actual conditions of Tangkou Coal Mine in Shandong Province. It presents a set of comprehensive and integrated utilization schemes for the various different kinds of low quality heat energy. With heat pumps, the recycling of the low quality heat energy from the drainage, bathing water and the exhaust air can occur in winter, and in summer, there exists condensed heat of the refrigerating system. When in conjunction with solar collectors, the thermal utilization of solar power can be realized for the whole year. The system achieves mine drainage and bathing water purification and recycling, as well as purifying exhaust air by water spraying. It also satisfies the demands of a whole year's bathing heat for the coal mine, with refrigeration in summer, and heating for the ground house and shaft house in winter. It is able to integrate different kinds of low quality heat energy and low emission drainage and dust, and can replace the traditional boiler heating system. Finally, the system reduces conventional energy consumption and the amount of mine water drainage. 展开更多
关键词 low-grade thermal energy high temperature mine integrated utilization energy conservation
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Analysis and Prospect of Waste Heat Utilization from Blast Furnace Slag Flushing
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作者 Shenqin Zhang Junyi Qing 《Frontiers of Metallurgical Industry》 2024年第2期15-20,共6页
Estimating the residual heat of blast furnace slag flushing in China,classifying and introducing the current proposed methods of slag flushing waste heat utilization,and listing existing cases.In order to better save ... Estimating the residual heat of blast furnace slag flushing in China,classifying and introducing the current proposed methods of slag flushing waste heat utilization,and listing existing cases.In order to better save energy and water in the slag flushing process of blast furnaces,an ideal comprehensive cascade utilization system scheme for annual recovery of waste heat is proposed.Based on the measured waste heat data of a steel plant,design calculations are carried out to further analyze the economic feasibility of the new scheme and provide reference for its promotion and application. 展开更多
关键词 blast furnace slag flushing waste heat utilization comprehensive cascade utilization energy saving and water-saving
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ANALYSES OF THE DIFFERENCE BETWEEN IRRIGATED AND NONIRRIGATED AREA FOR LUMINOUS ENERGY UTILIZATION RATIO AND PRODUCTIVE POTENTIALITIES IN NINGXIA
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作者 Sun Fulu Ningxia Center of Climatological Date 《干旱区资源与环境》 CSCD 1993年第Z1期391-396,共6页
Situated in arid and semi-arid lands, the Ningxia Hui Autonomous Region is locatedat the middle reaches of the Yellow River. An adequate system of gravity irrigation was es-tablished in the north of Ningxia. Adding to... Situated in arid and semi-arid lands, the Ningxia Hui Autonomous Region is locatedat the middle reaches of the Yellow River. An adequate system of gravity irrigation was es-tablished in the north of Ningxia. Adding to abundant sunshine, strong solar radiation andmoderate heat, the agriculture is very developed. The south mountainous area of Ningxia, including both Yanchi and Tongxin counties,is short of rain, The vast lands cannot be irrigated. Nonirrigated agriculture and 展开更多
关键词 IRRIGATED AGRICULTURE RAINFED AGRICULTURE LUMINOUS energy utilization Ratio Productive POTENTIALS
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Study on the Impact of Climatic and Environmental Factors on the Development and Utilization of Rooftop Solar Energy Resources in Inner Mongolia
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作者 Li Xinghua Hu Yanan +1 位作者 Zhao Jiaqi Hao Yuzhu 《Meteorological and Environmental Research》 CAS 2019年第6期32-36,共5页
Based on the data of 8 solar radiation stations and 119 meteorological stations in Inner Mongolia from 1961 to 2017 as well as the comparative observation of rooftop solar distributed photovoltaic power generation equ... Based on the data of 8 solar radiation stations and 119 meteorological stations in Inner Mongolia from 1961 to 2017 as well as the comparative observation of rooftop solar distributed photovoltaic power generation equipment,the impact of climatic and environmental factors on the development and utilization of rooftop solar energy resources was studied.The results show that the main climatic factors affecting rooftop solar power generation were cloud cover,precipitation,relative humidity,visibility,gale,dust weather,temperature and lightning disaster.Except for temperature and lightning disaster,other meteorological elements were negatively correlated with rooftop solar power generation,namely reducing direct radiation.The high temperature in Inner Mongolia in summer could cause the solar cell efficiency to decrease by 40%-60%,while the low temperature in eastern region in winter was not suitable for the development of rooftop solar energy resources.Lightning is the main meteorological disaster affecting the safe operation of photovoltaic systems,and class-2 lightning protection equipment needs to be installed.Photovoltaic power generation equipment should be installed on a roof which is not covered by high buildings and on the windward side of a chimney as much as possible.Areas with heavy dust pollution need to remove dust on the surface of solar panels in time.Snow and ice should be removed timely during snowfall in winter. 展开更多
关键词 SOLAR radiation SOLAR energy METEOROLOGICAL FACTORS Environmental FACTORS Development and utilization
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Current Situation and Suggestions for Energy Utilization of Agricultural Waste in Hubei Province
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作者 Lunjiao Ma Hui Xu Hong Wei 《Meteorological and Environmental Research》 CAS 2013年第8期47-49,52,共4页
Energy utilization is high-value use pattern of agricultural waste, and is main development direction of agricultural biomass energy industry in China. Planting and breeding industry in Hubei Province occupies importa... Energy utilization is high-value use pattern of agricultural waste, and is main development direction of agricultural biomass energy industry in China. Planting and breeding industry in Hubei Province occupies important position in whole country. Agricultural waste resources are rich, and it has huge potential for developing agriculturel biomass energy. By statistical data during 2000 -2011, we analyzed current situation and problem for energy utilization of agricultural waste in Hubei Province, and put forward several countermeasures and suggestions, vigorously promoting energy utilization of agricultural waste. 展开更多
关键词 Agricultural waste energy utilization Countermeasures and suggestions China
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Thermal Energy Collection Forecasting Based on Soft Computing Techniques for Solar Heat Energy Utilization System
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作者 Atsushi Yona Tomonobu Senjyu 《Smart Grid and Renewable Energy》 2012年第3期214-221,共8页
In recent years, introduction of alternative energy sources such as solar energy is expected. Solar heat energy utilization systems are rapidly gaining acceptance as one of the best solutions to be an alternative ener... In recent years, introduction of alternative energy sources such as solar energy is expected. Solar heat energy utilization systems are rapidly gaining acceptance as one of the best solutions to be an alternative energy source. However, thermal energy collection is influenced by solar radiation and weather conditions. In order to control a solar heat energy utilization system as accurate as possible, it requires method of solar radiation estimation. This paper proposes the forecast technique of a thermal energy collection of solar heat energy utilization system based on solar radiation forecasting at one-day-ahead 24-hour thermal energy collection by using three different NN models. The proposed technique with application of NN is trained by weather data based on tree-based model, and tested according to forecast day. Since tree-based-model classifies a meteorological data exactly, NN will train a solar radiation with smoothly. The validity of the proposed technique is confirmed by computer simulations by use of actual meteorological data. 展开更多
关键词 NEURAL Network Tree-Based Model Thermal energy COLLECTION Forecasting Solar Heat energy utilization SYSTEM
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Guangdong Dapeng LNG cold energy utilization-C_2++ extraction process integration
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作者 Wang liangjun Liu Yang +2 位作者 Andrew C. Potocki Zhao Xueliang Dong Shaohua 《Engineering Sciences》 EI 2010年第2期87-91,共5页
This paper makes a study of some technical and engineering aspects by using C2 + hydrocarbon separation facility at Guangdong Dapeng liquefied natural gas (GDLNG) terminal. In the C2+ hydrocarbon extraction proces... This paper makes a study of some technical and engineering aspects by using C2 + hydrocarbon separation facility at Guangdong Dapeng liquefied natural gas (GDLNG) terminal. In the C2+ hydrocarbon extraction process, the cold energy contained in LNG will be utilized. In order to ensure the optimum operating conditions of the temlinal and C2 + hydrocarbon extraction facility by optimizing the current operating processes of the terminal, the C2 + hydrocarbon extraction facility construction plan is proposed. We conducted numerous calculations and simulations using such specific analysis software as PRO II 〈 version 7.0 〉. Additionally available flow data are used to verify the cyclic send-out rates from the terminal, thus establishing the current and future projected load factors. This study is intended to make sure that GDLNG can continue to supply gas via the pipeline system safely without interruptions and most significantly solves the effects of flow fluctuations at the terminal gasification send-out facility on the hydrocarbons extraction, ensuring optimum pipeline operations and ensuring safe and effective means for such C2+ hydrocarbons extraction process as well. At the same time, the terminal is also in the optimum operation condition. This is very significant to the terminal safety operation and the energy conservation and emission reduction. 展开更多
关键词 LNG cold energy utilization C2 hydrocarbon extraction process INTEGRATION simulations and calculations
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The Develoyment Program of Energy Conservation and Comprehensive Utilization 2005-2007
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《China Standardization》 2006年第4期9-10,共2页
Jointly published by 14 Department headed by Standardization Administraion ofChina(SAC) Subtitle: China will formulate and reformulate 926 standards for energy conservation andcomprehensive u-tilization during 2005 an... Jointly published by 14 Department headed by Standardization Administraion ofChina(SAC) Subtitle: China will formulate and reformulate 926 standards for energy conservation andcomprehensive u-tilization during 2005 and 2007. In the past few days, 14 departments jointlypublished the Development Program of Energy Conservation and Comprehensive Utilization 2005-2007,(Program for short). They are Standardization Administration of China, National Development andReform Commission, Ministry of Land and Resources, Ministry of Establishment, Ministry ofCommunications, Ministry of Information Industry, Ministry of Waster Resources, Ministry ofAgriculture, Ministry of Commerce, General Administration of Quality Supervision, Inspection andQuarantine of the PRC, State Environmental Protection Administration, State Forestry Bureau, StateOceanic Administration and China Meteorological Bureau. 展开更多
关键词 PRO The Develoyment Program of energy Conservation and Comprehensive utilization 2005-2007
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OPTIMIZING WINDOW TO WALL RATIO FOR CONSERVING ENERGY IN OFFICE BUILDINGS FOR COOLING DOMINANT CLIMATES WITH AND WITHOUT DAYLIGHT UTILIZATION
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作者 Madeeha Altaf Frances Hill 《Journal of Green Building》 2019年第3期129-142,共14页
The construction of fully glazed commercial building facades responsible for high energy consumption has become a common architectural practice worldwide irrespective of the climate.This paper presents the methodology... The construction of fully glazed commercial building facades responsible for high energy consumption has become a common architectural practice worldwide irrespective of the climate.This paper presents the methodology to optimize the Window to Wall Ratio(WWR)with and without daylight utilization to reduce energy consumption in office buildings for the climate of Lahore,Pakistan,using a simulation tool COMFEN.The impacts of solar heat and daylight entering through the building façade with reference to different WWR and orientation were explored for the selection of optimum WWR.The optimum WWR was selected on the basis of least energy consumption whilst achieving a threshold lighting level.When daylight is not utilized,the energy demand is minimized by the lowest possible WWR.With daylight utilization,energy demand is optimized by use of WWRs of 13%to 30%according to orientation.Optimum WWR with daylight utilization offered a more balanced solution.The methodology used in this study can be applied to any location around the world to find optimum WWR for any glazing type. 展开更多
关键词 optimum WWR building energy demand daylight utilization cooling dominant climate threshold criteria
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Progress and Development Strategy of Biomass Energy Utilization Technologies in China
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作者 Wu Chuangzhi & Chen Yong(Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences) 《Bulletin of the Chinese Academy of Sciences》 2001年第4期231-236,共6页
I. Preface Biomass includes the residues of agriculture, forest and stock breeding, as well as straw, algae and energy crops. In its broad meaning, biomass is a kind of organic matter produced by the photosynthesis of... I. Preface Biomass includes the residues of agriculture, forest and stock breeding, as well as straw, algae and energy crops. In its broad meaning, biomass is a kind of organic matter produced by the photosynthesis of plants, which is not only renewable, but also contains plentiful energy. 展开更多
关键词 Progress and Development Strategy of Biomass energy utilization Technologies in China
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Comparison of two schemes for district cooling system utilizing cold energy of liquefied natural gas 被引量:1
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作者 王弢 林文胜 顾安忠 《Journal of Southeast University(English Edition)》 EI CAS 2010年第2期316-319,共4页
Two schemes(scheme Ⅰ and scheme Ⅱ)for designing a district cooling system(DCS)utilizing cold energy of liquefied natural gas(LNG)are presented.In scheme Ⅰ,LNG cold energy is used to produce ice,and then ice i... Two schemes(scheme Ⅰ and scheme Ⅱ)for designing a district cooling system(DCS)utilizing cold energy of liquefied natural gas(LNG)are presented.In scheme Ⅰ,LNG cold energy is used to produce ice,and then ice is transported to the central cooling plant of the DCS.In scheme Ⅱ,return water from the DCS is directly chilled by LNG cold energy,and the chilled water is then sent back to the central plant.The heat transportation loss is the main negative impact in the DCS and is emphatically analyzed when evaluating the efficiency of each scheme.The results show that the DCS utilizing LNG cold energy is feasible and valuable.The cooling supply distance of scheme Ⅱ is limited within 13 km while scheme Ⅰ has no distance limit.When the distance is between 6 and 13 km,scheme Ⅱ is more practical and effective.Contrarily,scheme Ⅰ has a better economic performance when the distance is shorter than 6 km or longer than 13 km. 展开更多
关键词 district cooling system liquefied natural gas(LNG) cold energy utilization system efficiency
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