Solar & Wind Technology最新文献_第3页

Design of discrete control system for a solar heating model 太阳能加热模型离散控制系统设计

Solar & Wind Technology Pub Date : 1990-01-01 DOI: 10.1016/0741-983X(90)90071-9

R. Habib, H.Sh. Habib

引用次数: 0

Prediction of a photovoltaic system performance using cumulative frequency curves of radiation 利用辐射累积频率曲线预测光伏系统性能

Solar & Wind Technology Pub Date : 1990-01-01 DOI: 10.1016/0741-983X(90)90066-B

S. Sivoththaman

引用次数: 4

Analysis of satellite-measured insolation in Brazil 巴西卫星测量日晒分析

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90054-6

L.A. Frulla , H.Grossi Gallegos , D.A. Gagliardini , G. Atienza

{"title":"Analysis of satellite-measured insolation in Brazil","authors":"L.A. Frulla , H.Grossi Gallegos , D.A. Gagliardini , G. Atienza","doi":"10.1016/0741-983X(90)90054-6","DOIUrl":"10.1016/0741-983X(90)90054-6","url":null,"abstract":"<div><p>Incoming solar radiation, insolation, is an important factor in many processes occuring at the earth surface. These include natural processes such as energy and moisture flux, photosynthesis, evapotranspiration, as well as quantities of interest in solar energy applications, such as energy available for focusing and non-focusing solar collectors and photovoltaic cells. In Brazil, solar radiation has been measured from 1978 through a network of pyranometers distributed all over the country. In the area limited by 15° and 34°S latitude and 40° and 67°W longitude, insolation estimates have been made using the geostationary satellite (GOES) from May 1982 to June 1984. It was thus possible to compare the simultaneous daily values of global solar radiation corresponding to the Southern part of Brazil during 1982 and 1983. The purpose of this paper is to analyse the accuracy of the estimates, presenting the results of the comparison. They show that standard error of the satellite-derived daily insolation values when compared against pyranometers is in the range of 15–30% of the mean values. Therefore, operational estimation of surface insolation in this region using GOES data appears normally feasible.</p></div>","PeriodicalId":101171,"journal":{"name":"Solar & Wind Technology","volume":"7 5","pages":"Pages 501-509"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0741-983X(90)90054-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90682124","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: 7

Wall thermal designs adapted to unconditioned Tunisian dwellings 墙体热设计适用于突尼斯的无条件住宅

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90086-H

N. Ghrab-Morcos

引用次数: 1

Hour-by-hour simulation of solar H2OLiBr absorption heat transformers in Athens 太阳能H2O的逐小时模拟雅典的LiBr吸收式热变压器

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90077-F

D.A. Kouremenos, K.A. Antonopoulos, E. Rogdakis

{"title":"Hour-by-hour simulation of solar H2OLiBr absorption heat transformers in Athens","authors":"D.A. Kouremenos, K.A. Antonopoulos, E. Rogdakis","doi":"10.1016/0741-983X(90)90077-F","DOIUrl":"https://doi.org/10.1016/0741-983X(90)90077-F","url":null,"abstract":"<div><p>A method is presented for predicting the performance of solar H<sub>2</sub>OLiBr absorption heat transformers, which receive solar heat at an intermediate-temperature level, reject a part of it in the ambient at a low-temperature level and deliver the remaining useful heat at a high-temperature level. Simple relations are derived, which define the exact thermodynamic cycle of heat transformer and allow calculation of characteristic temperatures and heat quantities exchanged in terms of the main parameters of the unit. A correlation linking the heat gain factor to the main parameters is presented, which may be used for calculating the optimum cycle. The procedure developed has been employed for predicting the hour-by-hour performance of solar driven absorption heat transformers in the Athens area along a typical year, using mean climatological conditions obtained by processing of 20 years hourly measurements. The theoretical heat gain factor has been found to be practically constant (≅51%) along the typical year. With usual flat plate collectors, the calculated maximum values of the specific heat gain for January, March, May, July, September and November are 79, 143, 232, 247, 185 and 107 W/m<sup>2</sup>-collector, respectively, obtained at 13 or 14 h under a maximum temperature of about 100°C.</p></div>","PeriodicalId":101171,"journal":{"name":"Solar & Wind Technology","volume":"7 2","pages":"Pages 111-118"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0741-983X(90)90077-F","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91637428","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

The potential for increasing the efficiency of solar cells in hybrid photovoltaic/thermal concentrating systems by using beam splitting 在混合光电/热聚光系统中使用光束分裂提高太阳能电池效率的潜力

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90082-D

M.Adel Hamdy, D.E. Osborn

引用次数: 13

Wind and other factor requirements to solar energy applications in Iraq 风能等因素对伊拉克太阳能应用的要求

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90069-E

Iman T. Al-Alawy

引用次数: 9

Solid absorbent dispersion in an inert fluid for solar refrigeration applications 用于太阳能制冷应用的惰性流体中的固体吸收分散体

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90068-D

S.O. Enibe

{"title":"Solid absorbent dispersion in an inert fluid for solar refrigeration applications","authors":"S.O. Enibe","doi":"10.1016/0741-983X(90)90068-D","DOIUrl":"https://doi.org/10.1016/0741-983X(90)90068-D","url":null,"abstract":"<div><p>One of the most significant factors limiting the performance of solar powered solid absorption refrigeration systems is the low rates of heat and mass transfer within the absorbant pellet. Solutions to these problems are discussed in this paper. They include the use of suitable additives or treatments, and the dispersion of the absorbent in an inert liquid which has a high absorption capacity for the refrigerant without impeding the absorption and generation reactions. With particular reference to the calcium chloride/ammonia system, the experimental investigation of the idea of dispersing the absorbent in an inert liquid is reported here. The tests were performed by simulating the absorption and generation reactions in two mild steel pressure vessels, one acting as the absorber/generator, and the other as the receiver of the condensed refrigerant. Normal heptanol was used as the inert liquid. The novel feature of the investigation is the use of a bubble agitation device in order to dispense with mechanical stirring of the dispersion. Heating was done electrically, pressure, temperature and mass measurements being taken. The results indicate that the absorption and generation reactions were at least five times faster with the dispersion. The practical problems of utilizing the absorbent in this form in solar refrigeration systems are considered.</p></div>","PeriodicalId":101171,"journal":{"name":"Solar & Wind Technology","volume":"7 5","pages":"Pages 591-595"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0741-983X(90)90068-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91737221","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: 3

Women's role in energy usage in rural areas 妇女在农村地区能源使用中的作用

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-06 DOI: 10.1016/0741-983X(90)90014-S

Vineeta Hoon

引用次数: 0

Characteristic distribution of global solar radiation for Amman, Jordan 约旦安曼全球太阳辐射的特征分布

Solar & Wind Technology Pub Date : 1990-01-01 Epub Date: 2003-03-05 DOI: 10.1016/0741-983X(90)90095-J

M.A. Alsaad

{"title":"Characteristic distribution of global solar radiation for Amman, Jordan","authors":"M.A. Alsaad","doi":"10.1016/0741-983X(90)90095-J","DOIUrl":"10.1016/0741-983X(90)90095-J","url":null,"abstract":"<div><p>Hourly global solar radiation data measured on a horizontal surface in Amman, Jordan, available for the period 1983–1987, have been studied and analysed. Average values of daily, monthly and yearly global radiation, as well as maximum and minimum radiation values, were determined. The average monthly mean daily global radiation ranged from 8.001 to 2.653 kWh m<sup>−2</sup> per day. Over the 1983–1987 period, the annual daily mean of global radiation was 5.302 kWh m<sup>−2</sup> per day. The maximum monthly mean daily global radiation varied between 8.295 and 3.611 kWh m<sup>−2</sup> per day whereas that of the minimum monthly mean daily radiation varied between 7.590 and 1.680 kWh m<sup>−2</sup> per day. The calculated monthly mean daily global solar radiation data were employed to develop linear correlations between the sunshine hours and each of the average, maximum and minimum global radiation for Amman, using regression technique. The accuracy of the derived correlations was tested using measured radiation data for Amman. The results show that the developed correlations are adequate to predict monthly mean daily global radiation within a maximum error ranging between 6.6 and 9.6%. The average error incurred in predicting global radiation does not exceed 0.3%.</p></div>","PeriodicalId":101171,"journal":{"name":"Solar & Wind Technology","volume":"7 2","pages":"Pages 261-266"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0741-983X(90)90095-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86377706","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: 28