摘要:

AbstractA linear programming optimization technique is applied to the problem of allocating new land using activities in an existing urban area. While it is recognized that energy is not yet as decisive a factor in the determination of household and firm locational patterns as other factors such as accessibility and time costs, the model attempts to resolve land allocation problems by means of minimizing total transportation energy costs alone. Such an analysis may serve as a benchmark against which other policies and their energy repercussions could and should be measured.

ISSN:0363-907X    

DOI:10.1002/er.4440040102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractAn electronic circuit is described which enables a standard multi‐point chart recorder to measure voltage, current, power, reactive power, kilo‐volt‐amps and power factor in AC electrical

ISSN:0363-907X    

DOI:10.1002/er.4440040103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractThe processes which take place in the direct conversion cells of nuclear fission energy into electrical energy are investigated.Based on the experimental results obtained at the Central Institute of Physics, Bucharest, it is shown that the use of the catastrophe theory is needed to describe an adequate model for the cells' behaviour. Three functioning models of the cells with electrostatic suppression of the secondary electrons are described.It is shown that, in these cases, the fold and cusp catastrophe model are sufficient.The description in terms of the catastrophe theory allows the choice of some parameters in order to overcome the experimental difficulties with the purpose of obtaining higher voltages and acceptable efficiencies.

ISSN:0363-907X    

DOI:10.1002/er.4440040104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractFive systems which use solar energy to heat houses are discussed and evaluated for thermal performance and cost‐effectiveness by the use of a computer simulation model based on a typical Irish house. It is shown that such systems are currently unviable when compared with systems using oil, gas and off‐peak electricity. the most economic solar system is that which uses rock as storage medium. Further, it is demonstrated that thermal performance is relatively insensitive to changes in storage vol

ISSN:0363-907X    

DOI:10.1002/er.4440040105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractThis paper presents a periodic analysis for estimating the distillate output of a single‐basin‐type still with large water depth, when the still (i) rests on the ground and (ii) is mounted on a stand. Our observations on the mounted still are in good agreement with the theory. the theory also provides theoretical basis for two well‐known experimental results,viz.,(i)The daily yield of the distillate is independent of the insulation in a ground still (Bloemeret al.1),(ii)The daily yield of distillate for a large mass in the water basin in independent of the water

ISSN:0363-907X    

DOI:10.1002/er.4440040106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractA somewhat new approach to the design of solar concentrators of Fresnel reflector geometry is outlined. the constituent mirror elements of the concentrator surface are characterised by three parameters, shift, tilt and width. the evaluation of these parameters and the concentration characteristics are investigated on the basis of a simple ray optical model.

ISSN:0363-907X    

DOI:10.1002/er.4440040107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractThis paper presents an investigation of the performance of single and double exposure solar air heaters. A conventional solar air heater consist of a flat passage between two metallic plates through which heating fluid (air) is made to pass. the conduction loss along the lengths of the plates in the direction of the air flow and the radiation loss of heat from the absorbing plate to the bottom plate have been incorporated in the analyses. the analyses consist of the exact solutions of the heat balance equations for the absorbing plate, bottom plate and the air stream. Analytical expressions for the plate and the air stream temperatures as a function of distance along the direction of air flow and some other parameters have been derived. It is found that the heat conduction effects are negligible in both the air heaters and the reradiation of heat from the absorbing plate to the bottom plate is also insignificant.

ISSN:0363-907X    

DOI:10.1002/er.4440040108

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractThe end effects phenomenon is investigated in a MHD channel with finitely segmented electrode walls when the applied magnetic field decays as a sinusoidal function at the entrance and is constant inside the channel. the governing equations to determine the electric potential are solved numerically by the successive overrelaxation method. the normal current distribution and the electrical efficiency are calculated for various types of electrode spacing. It is found that the leakage currents are more for the case when the electrode length is greater than the insulator length, and the end losses are less.

ISSN:0363-907X    

DOI:10.1002/er.4440040109

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractA proposal is made for a technique of synthesizing a number of different materials in a photoelectrochemical reactor.

ISSN:0363-907X    

DOI:10.1002/er.4440040110

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY

摘要:

AbstractThis communication presents a derivation of an explicit expression for the periodic variation of thermal flux through a composite slab (insulation‐concrete‐insulation or concrete‐insulation‐concrete), with one face exposed to solar radiation and atmospheric air and the other face in contact with room air at constant temperature. It is seen that for maximum or minimum load levelling of the periodic heat flux the thicknesses of the outer layers of the composite slab ar

ISSN:0363-907X    

DOI:10.1002/er.4440040111

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1980

数据来源: WILEY