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Some aspects of the transient response of a flat-plate solar energy collector 平板太阳能集热器瞬态响应的几个方面
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90012-8
D.L. Siebers , R. Viskanta
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引用次数: 7
List of contents and author index 目录和作者索引
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90018-9
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引用次数: 0
On the relation between insolation and climatological variables—V. Estimation of availability of solar energy 论日照与气候变量的关系——v。估计太阳能的可用性
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90086-4
Donald Rapp, A.A.J. Hoffman
{"title":"On the relation between insolation and climatological variables—V. Estimation of availability of solar energy","authors":"Donald Rapp,&nbsp;A.A.J. Hoffman","doi":"10.1016/0013-7480(78)90086-4","DOIUrl":"10.1016/0013-7480(78)90086-4","url":null,"abstract":"<div><p>A new procedure is developed for estimating availability of solar energy in localities where adequate data are not available. The hourly variations in solar intensity with day of the year during clear weather (essentially no clouds and unlimited visibility) are shown to follow regular repeatable patterns. These patterns have been determined for four south-western locations. From these data, it is possible to estimate the maximum possible available solar energy for perfectly clear weather. The effect of clouds and reduction in visibility is to reduce the solar intensity below the value appropriate to any hour of any day in clear weather. A study of the dependence of reduction in solar intensity on cloud cover and visibility is now being conducted for several southwestern locations. A model for the dependence of direct normal solar intensity on total insolation is also being developed.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 1","pages":"Pages 31-37"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90086-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82429998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Energy related mathematical models: Annotated bibliography 能源相关的数学模型:注释书目
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90019-0
C. Deeter, A. Hoffman
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引用次数: 2
Integrated energy conversion systems: A mathematical model of extraction steam turbine 综合能量转换系统:抽汽式汽轮机的数学模型
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90083-9
M.Hosein Fallah
{"title":"Integrated energy conversion systems: A mathematical model of extraction steam turbine","authors":"M.Hosein Fallah","doi":"10.1016/0013-7480(78)90083-9","DOIUrl":"10.1016/0013-7480(78)90083-9","url":null,"abstract":"<div><p>In some integrated energy conversion systems, automatic extraction steam turbines are used to provide low quality steam from the turbine for process use or district heating and cooling purposes. This paper presents a generalized mathematical model for steam turbine/generator based on the Rankine cycle. Also, simplified linear models are presented for pure condensing, single extraction and double extraction turbine/generators which could be adapted to optimization of integrated energy conversion systems.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 1","pages":"Pages 11-15"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90083-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79440405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of a direct coupling D.C. motor and a photovoltaic converter 直流电机与光伏变换器直接耦合分析
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90075-X
J. Bany
{"title":"Analysis of a direct coupling D.C. motor and a photovoltaic converter","authors":"J. Bany","doi":"10.1016/0013-7480(78)90075-X","DOIUrl":"10.1016/0013-7480(78)90075-X","url":null,"abstract":"<div><p>Applications of photovoltaic solar energy conversion are increasing, and among them are systems of electric motors coupled to solar cell arrays, such as for water pumping. A study of the interaction of the photovoltaic converter and the electric drive is needed for these systems. This paper deals, therefore, with the performance of direct current motors-separate, series and shunt excitation, supplied from a solar cell array. The motor characteristics—current-speed and torque-speed at different solar radiation levels—were studied.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 2","pages":"Pages 73-79"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90075-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"107829655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Wall stabilization in a possible high-temperature gas-core fission reactor 一个可能的高温气芯裂变反应堆的壁稳定
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90074-8
J. Kistemaker, M.J.P.C. Nieskens
{"title":"Wall stabilization in a possible high-temperature gas-core fission reactor","authors":"J. Kistemaker,&nbsp;M.J.P.C. Nieskens","doi":"10.1016/0013-7480(78)90074-8","DOIUrl":"10.1016/0013-7480(78)90074-8","url":null,"abstract":"<div><p>It is investigated if graphite as wall material in a gas-core reactor is compatible with a gas mixture consisting of UF6 and carbon fluorine compounds at high temperatures. A possibility for non-corrosive operation exists at temperatures ranging from 2000 to 2500 K at pressures of about 30 atm, introducing a mixture of UF6 and about 20 to 30 mole % C<sub>2</sub>F<sub>2</sub> or C<sub>2</sub>F<sub>4</sub> Another possibility is to introduce UF<sub>4</sub> as an aerosol in CF<sub>4</sub> as a carrier gas. For the latter case a flow-sheet is presented, indicating the possibility of a non-proliferation fission reactor.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 2","pages":"Pages 67-71"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90074-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75959811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Two-phase flow in geopressured geothermal wells 高压地热井中的两相流
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90088-8
S.K. Garg, J.W. Pritchett
{"title":"Two-phase flow in geopressured geothermal wells","authors":"S.K. Garg,&nbsp;J.W. Pritchett","doi":"10.1016/0013-7480(78)90088-8","DOIUrl":"10.1016/0013-7480(78)90088-8","url":null,"abstract":"<div><p>The production characteristics of two-phase (free methane and liquid water with dissolved methane) geopressured geothermal wells are analyzed. The fluid flow in the aquifer is treated as single-phase (liquid water with dissolved methane) unsteady radial Darcian flow; two-phase flow is assumed to occur only in the cased part of the production hole. The mathematical model allows for different gas and liquid velocities in the two-phase regime. Sample calculations illustrate the effects on production of aquifer permeability and compressibility, the depth of the geopressured aquifer, the reservoir temperature, and the dissolved methane content of the aquifer fluids.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 1","pages":"Pages 45-51"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90088-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91513563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The design and testing of a vertical-axis wind turbine using sails 采用风帆的垂直轴风力发电机的设计与试验
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90013-X
B.G. Newman , T.M. Ngabo
{"title":"The design and testing of a vertical-axis wind turbine using sails","authors":"B.G. Newman ,&nbsp;T.M. Ngabo","doi":"10.1016/0013-7480(78)90013-X","DOIUrl":"10.1016/0013-7480(78)90013-X","url":null,"abstract":"<div><p>A vertical-axis wind turbine using sails rather than solid blades has been designed and tested at large model scale in a 15 ft diameter wind tunnel. The turbine has a relatively high solidity, three blades and an operating range of tip speed ratios from zero to about 2.5. Two types of sail have been tested—a double sail consisting of two layers of cloth wrapped round a circular leading edge dowel, and a jib sail consisting of a single layer of cloth with the leading edge held by a taut wire. The measured power outputs are about half those of a turbine with solid aerofoil blades running at tip speed ratios of 5 or 6. However, the cost and skill required for manufacture of the sail turbines are less and it is concluded that the present designs, which can be self starting if the trailing edge tension is appropriately set, may have application for 1 kW machines in developing countries.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 3","pages":"Pages 141-154"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90013-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85698170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Aeroelastic wind energy converter 气动弹性风能转换器
Energy Conversion Pub Date : 1978-01-01 DOI: 10.1016/0013-7480(78)90079-7
Goodarz Ahmadi
{"title":"Aeroelastic wind energy converter","authors":"Goodarz Ahmadi","doi":"10.1016/0013-7480(78)90079-7","DOIUrl":"10.1016/0013-7480(78)90079-7","url":null,"abstract":"<div><p>The principle of aeroelastic wind energy conversion is introduced and an H-section model which works on the basis of torsional aeroelastic instability is described. A mathematical formulation for the prediction of the power coefficient of such wind machines is presented. A small model is, constructed and tested in a wind tunnel. Although the efficiency of the model was very low, the system has the advantage of being capable of conversion of energy at very low wind speed. Furthermore, this wind energy converter is relatively simple and economical.</p></div>","PeriodicalId":100466,"journal":{"name":"Energy Conversion","volume":"18 2","pages":"Pages 115-120"},"PeriodicalIF":0.0,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0013-7480(78)90079-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"107815720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
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