ISSN:0363-907X    

DOI:10.1002/er.4440010102

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe present state and future possibilities of controlled‐nuclear‐fusion research are reviewed, including basic concepts and problems, as well as various approaches based on magnetic‐ and nonmagnetic‐confinement schemes.Considerable progress has so far been made in both plasma physics and fusion‐reactor technology, and a closer relationship has been established between theory and experiments. Still, none of the present approaches will, for certain, lead to the final solution of a full‐scale reactor. Intensified work along broad lines, with emphasis also on basic research and new ideas, is necessary for fut

ISSN:0363-907X    

DOI:10.1002/er.4440010103

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

年代:1977

数据来源: WILEY

摘要:

AbstractZnTe (Eg= 2.26 eV) and CdTe (Eg= 1.5 eV) were studied as possible candidates for a photocathode in the photoelectro‐chemical production of hydrogen.Current‐potential relationships with and without light, photocurrent‐wavelength relationships at various potentials, and the flatband potential, were measured for both electrodes in 1 N NaOH solution. the stabilities of both electrodes in NaOH solution were also examined.CdTe is a possible photocathode, but ZnTe is unacceptable, because the photocurrent appears at a too‐negative potential in relation to its negative flatband potential, and because of its low st

ISSN:0363-907X    

DOI:10.1002/er.4440010104

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

年代:1977

数据来源: WILEY

摘要:

AbstractRecent design trends of automotive petrol engines, brought about by the need to meet exhaust‐emissions legislation, are discussed. It is explained why many of the consequent changes have the side effect of seriously increasing fuel consumption. the conventional inlet system is isolated as a major cause of poor combustion, which leads to the presence of much of the pollutants, and to low engine efficiency.A historical survey is included on the events leading to the present‐day exhaust‐emissions legislation, and the sources of, effects of and conventional methods of control of the major pollutants are discussed.An alternative approach to the reduction of exhaust emissions has recently attracted interest. Mixture preparation as a means of delivering a near‐homogeneous mixture to the engine cylinders has the combined effect of reducing exhaust emissions and fuel consumption. A survey of research and recent applications of this method is included.A method of achieving a near‐homogeneous mixture which is simple and effective, and which has been developed by the authors, is described. the results of a lengthy programme of tests in both a laboratory situation and in a car ‘on the road’ are presented and discussed. the encouraging conclusion is drawn that this approach (mixture pretreatment and lean mixture) does indeed result in cleaner exhaust gases and reduced petro

ISSN:0363-907X    

DOI:10.1002/er.4440010105

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe construction and operation of a controlled‐environment laboratory for the testing of domestic heat pumps is described. the operational range of the laboratory is ‐ 5°C to 20°C with relative humidity up to 100%. Air‐to‐water heat pumps of up to 16 kW heating capacity can be tested with the present design, but modifications to allow for the testing of larger units or of air‐to‐air units are also described. the laboratory is stable to within 1°C and 5% relative humidity, and has a recovery time of 12 min to a perturbation of 3 kW. the test procedure for air‐to‐water heat pumps is described in detail and some preliminary

ISSN:0363-907X    

DOI:10.1002/er.4440010106

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe relative merits of various alternative‐energy sources are discussed with particular reference to their suitability in the French context. the case is presented for decentralized solar power as against centralized solar‐power production, and some test installations in France are described. the potential for geothermal power is examined, and it is shown that the resource is essentially nonrenewable. A history of wind generation in France is presented, and power extraction from the seas is discussed, with particular reference to the Rance tidal‐power scheme. While the public romance with alternative‐energy schemes is accepted, it is pointed out that this may only last for as long as their implementation is on a smal

ISSN:0363-907X    

DOI:10.1002/er.4440010107

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe paper deals with some of the major aspects of heat‐exchanger design for electric heat pumps. After a discussion of heat‐transfer theory, it describes a method that can be used in the design and sizing of air‐to‐refrigerant heat exchangers and in calculating temperature distributions. As an illustration, economically optimum sizes for exchanger coils are given for heat pumps of output 13.9 kW, 5.6 kW and 5 kW at 5°C outside the ambient temperature. At several stages, manufacturer's experimental data have been used, and the final results are compared with the design of heat exchangers used in commercially available models. Some temperature measurements made on a heat‐pump installation in an experimental house are also reported.At least doubling the size of presently used indoor coils is shown to be economically justifiable, increasing the seasonal coefficient of performance from about 2.4 to 2.8‐3.0. Reassessment of outdoor‐fan size is also shown to be necessary.Throughout the work it is assumed that the heat pump is required for heating only, as would be the case in the

ISSN:0363-907X    

DOI:10.1002/er.4440010108

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

年代:1977

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440010109

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

年代:1977

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440010110

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

年代:1977

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440010101

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

年代:1977

数据来源: WILEY