摘要:

Conventional long-term, all-inclusive building monitoring field trials are seen to be inappropriate for passive solar buildings, and to hinder the swift dissemination of performance information to the design and building professions.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675904

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

On 11 June 1983, a total eclipse of the sun occurred over Java, producing a partial eclipse over Northern Australia. Pyrheliometers located at three solar radiation stations in the Northern Territory recorded the direct radiation during the eclipse. The unobscured area of the solar disc during this event was computed from formulae given in the Supplement to the Astronomical Ephemeris [1]. Comparison of the reduced direct solar insolation with the uneclipsed solar area shows an approximately constant ratio between these two quantities during the event, based on measurements taken at Darwin.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675905

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Maximum power and efficiency at the maximum power of an irreversible solar heat engine are treated. When time is explicitly considered in the energy exchanges between the solar heat engine and its surroundings, it is found that there is a bound on the efficiency of the real solar heat engine at the maximum power condition. This bound can guide the evaluation of existing solar power generating systems or influence design of future solar heat engines.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675906

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

A simulation program has been developed for Changi International Airport Services (CIAS) solar heating system and predicted results are compared with observed performance. The solar system consists of energy collection and storage device, heat exchangers, air cooling units, and auxiliary heaters. Established engineering principles have been used for the simulation of the components, and the meteorological data have been used as the driving function. Experimental results are compared with predicted values, both on hourly and daily basis. Simulated results are found to agree reasonably well with the measured data within the accuracy of measurements. This helps to establish the validity of the model for system simulation and thus it can be used for the evaluation of long term performance of a solar system applied to industrial process heating.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675907

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The paper begins by examining the reasons for using alcohol fuels as a replacement for petroleum-derived fuels. The wide range of sources of alcohols enable most nations to undertake production of indigenous supplies. In general alcohols are excellent fuels for the spark-ignition engine of traditional design. Alcohol is quite unsuited in combustion properties for the more efficient unthrottled compression-ignition (diesel) engine. The reasons for this are explained and various means of overcoming the problems are outlined—additives for cetane improvement, alcohol-diesel emulsions, dual injection, fumigation, surface ignition and spark ignition. In each case the practical drawbacks as well as the benefits are discussed. Finally some conclusions are drawn about the potential for alcohol-fuelled diesel engines based on the authors' studies and experimental work.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675908

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The air layer confined between skin and fabric not only acts as insulation, but also as an active system to manage latent and dry losses. Its temperature and water content are derived for a simple model. From this model, the thermal behaviour of clothing to insure comfort for different climates is then analysed.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675909

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The position of the sun at any time of the day and year can be found to within one hundredth of a degree of arc with computer programs that have appeared in the literature. However, many solar energy text books give, instead, empirical methods which do not require access to a computer. For some solar energy applications the results of these empirical methods may not be sufficiently accurate. This paper compares five empirical procedures for calculating the equation of time, necessary for obtaining solar position, and then tests one of these against the computed solution. It is found that errors of at least five degrees of solar elevation can result from use of the empirical procedures.

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675910

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675911

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675912

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1988.9675913

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor