International Journal of Solar Energy最新文献_第2页

Assessment of the cost-effectiveness of photovoltaic systems for telecommunications in Nigeria 评估尼日利亚电信光伏系统的成本效益

International Journal of Solar Energy Pub Date : 2002-01-01 DOI: 10.1080/0142591031000094551

O. Oparaku

引用次数: 21

Evaluation of an innovative sensor for measuring global and diffuse irradiance, and sunshine duration 评估一种用于测量全球和漫射辐照度以及日照时间的创新传感器

International Journal of Solar Energy Pub Date : 2002-01-01 DOI: 10.1080/0142591032000069792

T. Muneer, Xiaodong Zhang, John Wood

{"title":"Evaluation of an innovative sensor for measuring global and diffuse irradiance, and sunshine duration","authors":"T. Muneer, Xiaodong Zhang, John Wood","doi":"10.1080/0142591032000069792","DOIUrl":"https://doi.org/10.1080/0142591032000069792","url":null,"abstract":"Delta-T Device Limited of Cambridge, UK have developed an integrated device which enables simultaneous measurement of horizontal global and diffuse irradiance as well as sunshine status at any given instance in time. To evaluate the performance of this new device, horizontal global and diffuse irradiance data were simultaneously collected from Delta-T device and Napier University's CIE First Class daylight monitoring station. To enable a cross check a Kipp & Zonen CM11 global irradiance sensor has also been installed in Currie, south-west Edinburgh. Sunshine duration data have been recorded at the Royal Botanical Garden, Edinburgh using their Campbell-Stokes recorder. Hourly data sets were analysed and plotted within the Microsoft Excel environment. Using the common statistical measures, Root Mean Square Difference (RMSD) and Mean Bias Difference (MBD) the accuracy of measurements of Delta-T sensor's horizontal global and diffuse irradiance, and sunshine duration were investigated. The results show a good performance on the part of Delta-T device for the measurement of global and diffuse irradiance. The sunshine measurements were found to have a lack of consistency and accuracy. It is argued herein that the distance between the respective sensors and the poor accuracy of Campbell-Stokes recorder may be contributing factors to this phenomenon.","PeriodicalId":162029,"journal":{"name":"International Journal of Solar Energy","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133851321","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

Finite time thermodynamic analysis of an irreversible regenerative closed cycle brayton heat engine 不可逆蓄热式闭式布雷顿热机的有限时间热力学分析

International Journal of Solar Energy Pub Date : 2002-01-01 DOI: 10.1080/0142591031000094542

S. Kaushik, S. K. Tyagi

{"title":"Finite time thermodynamic analysis of an irreversible regenerative closed cycle brayton heat engine","authors":"S. Kaushik, S. K. Tyagi","doi":"10.1080/0142591031000094542","DOIUrl":"https://doi.org/10.1080/0142591031000094542","url":null,"abstract":"This communication presents the parametric study of an irreversible regenerative Brayton cycle with nonisentropic compression and expansion processes for finite heat capacitance rates of external reservoirs. The power output of the cycle is maximized with respect to the working fluid temperatures and the expressions for maximum power output and the corresponding thermal efficiency are obtained. The effect of the effectiveness of the various heat exchangers and the efficiencies of the turbine and compressor, the reservoir temperature ratio and the heat capacitance rate of heating and cooling fluids and the cycle working fluid on the power output and the corresponding thermal efficiency has been studied. It is seen the effect of cold side effectiveness is more pronounced for the power output while the effect of regenerative effectiveness is more pronounced for the thermal efficiency. It is found that the effect of turbine efficiency is more than the compressor efficiency on the performance of these cycles. It is also found that the effect of sink-side heat capacitance rate is more pronounced than the heat capacitance rate on the source side and the heat capacitance rate of the working fluid.","PeriodicalId":162029,"journal":{"name":"International Journal of Solar Energy","volume":"357 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133070126","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: 38

Evaluation of an attached sunspace without sun protection: How feasible is this approach in mediterranean summer conditions? 评估无防晒措施的附属阳光空间：这种方法在地中海夏季条件下的可行性如何？

International Journal of Solar Energy Pub Date : 2002-01-01 DOI: 10.1080/0142591021000041811

A. Papadopoulos, K. Papageorgiou, K. Karatzas

引用次数: 7

SOLAR WATER DISINFECTION AND POSSIBLE APPLICATION FOR HOUSEHOLD PURPOSES 太阳能水消毒和可能应用于家庭用途

International Journal of Solar Energy Pub Date : 2001-02-01 DOI: 10.1080/01425910108914375

F. Salih

{"title":"SOLAR WATER DISINFECTION AND POSSIBLE APPLICATION FOR HOUSEHOLD PURPOSES","authors":"F. Salih","doi":"10.1080/01425910108914375","DOIUrl":"https://doi.org/10.1080/01425910108914375","url":null,"abstract":"Sunlight possesses a potential germicidal activity, which varies throughout the day and the year, as well as with geographical locations and climatological status. In order to explore this phenomenon an attempt was made to investigate the possibility of using sunlight for water disinfection in the hope to apply this technique in areas where conventional water disinfection processes are not available. Autoclave sterilized raw river water containing a known concentration of E.coli cells was exposed to sunlight, for varying time intervals, in 50, 100, 500 and 1000ml glass bottles. Cells mounted on membrane filters were also exposed to sunlight in the same manner in order to study the direct effect of sunlight on bacterial cells. Results showed that about 4 hours of continuous sunlight exposure were required to reduce survivors to about 0.01% (4 log cycles) in bottles. The volume of exposed samples did not have significant influence on the efficiency of inactivation. However, about one hour was needed to achieve the same level of survivors with cells mounted on filters. Generally, solar inactivation capacity increased with the progression of the day giving a peak efficiency at 12:00-16:00 in winter, 11:00-17:00 in spring and autumn, and 10:00-18:00 in summer.","PeriodicalId":162029,"journal":{"name":"International Journal of Solar Energy","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122118318","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

EXPERIMENTAL STUDY OF A SOLAR STILL WITH SCREENS IN BASIN 盆式筛网太阳能蒸馏器的实验研究

International Journal of Solar Energy Pub Date : 2001-02-01 DOI: 10.1080/01425910108914374

B. Abu-Hijleh, M. Abu-Qudias, S. Al-Khateeb

引用次数: 11

A NEW PROCEDURE FOR THE ACCURATE INDOOR MEASUREMENT OF SOLAR-CELL I-V CHARACTERISTICS 太阳能电池i-v特性室内精确测量新方法

International Journal of Solar Energy Pub Date : 2001-02-01 DOI: 10.1080/01425910108914373

J. Gandı́a, J. Cárabe, F. Fabero, R. Jiménez, J. Rivero

引用次数: 1

SOLAR GLOBAL AND ULTRAVIOLET RADIATION MEASUREMENTS OVER KUWAIT 科威特上空的太阳全球辐射和紫外线辐射测量

International Journal of Solar Energy Pub Date : 2001-02-01 DOI: 10.1080/01425910108914376

N. El-Nashar, A. Abdullah, J. M. Al-Zenki

引用次数: 4

EXERGOECONOMIC EVALUATION OF A SOLAR THERMAL POWER PLANT 某太阳能热电厂运行经济性评价

International Journal of Solar Energy Pub Date : 2001-02-01 DOI: 10.1080/01425910108914377

S. Kaushik, Y. Abhyankar, S. Bose, S. Mohan

{"title":"EXERGOECONOMIC EVALUATION OF A SOLAR THERMAL POWER PLANT","authors":"S. Kaushik, Y. Abhyankar, S. Bose, S. Mohan","doi":"10.1080/01425910108914377","DOIUrl":"https://doi.org/10.1080/01425910108914377","url":null,"abstract":"The second law of thermodynamics combined with economics represents a very powerful tool for the systematic study and optimization of energy systems. This combination forms the basis of the relatively new field of thermoeconomics (exergoeconomics). This approach allows the monetary evaluation of costs caused by irreversibilities (exergy losses) as well as comparisons between these costs and the investment and operating costs for each component of a power plant. A 35MW solar thermal power plant has been analyzed with the aid of the exergoeconomics. It is found that in the reheater, heat exchanger and pumps it will be profitable to reduce exergy losses even by increasing the capital costs. Whereas it will be profitable to reduce capital cost in feed water heaters (no. 1, 2 and 3) by compromising with exergy losses. Most crucial component is the solar collector field where exergy losses are severe and it requires efficient collector design. Unfortunately not much could be done at the moment for the collectors. Its fate will depend on the advancements in collector technology. The analysis permits identification and evaluation of inefficiencies in the plant and opportunities for improvement in the plant components.","PeriodicalId":162029,"journal":{"name":"International Journal of Solar Energy","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129742036","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

INTELLIGENT FACADES: OCCUPANT CONTROL AND SATISFACTION 智能立面:乘员控制和满意度

International Journal of Solar Energy Pub Date : 2001-01-15 DOI: 10.1080/01425910108914369

S. Stevens

引用次数: 43