摘要:

AbstractUsing information on the dimensions and materials of a room in the Wallasey School, estimates are presented of its response to heat inputs due to the lighting system and the sun. The daily variation due to these influences is calculated using transient and harmonic approaches.

ISSN:0363-907X    

DOI:10.1002/er.4440100302

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

年代:1986

数据来源: WILEY

摘要:

AbstractThe problems in matching an external mechanical vapour compression heat pump to a distillation process in heat pump assisted distillation are discussed. There are four main design parameters to consider when selecting a working fluid for the heat pump, of which only two are independent. Various arrangements for imperfectly matched systems are presented, including the use of a two stage heat pump. A number of other factors which affect the choice of a heat pump assisted distillation system, including economic factors, are also considered.

ISSN:0363-907X    

DOI:10.1002/er.4440100303

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

年代:1986

数据来源: WILEY

摘要:

AbstractAn experimental study has been carried out on a continuously operated pilot fractional distillation column equipped with an external heat pump. The distillation column was a 15 cm diameter glass unit containing eleven single bubble cap plates. A methanol‐water mixture was fed to the column and the heat pump working fluid was R114. The actual coefficient of performance (COP)Aof the heat pump increased with an increase in the mass flow rate of the working fluid. A maximum (COP)Avalue of 4–3 was obtained with a gross temperature lift of 41–3°C. The performance of two reciprocating compressors was compared. The experiments have shown that continuous heat pump assisted distillation using an external working fluid can greatly reduce the energy used in a distillation process. No control problems were encountered in the exper

ISSN:0363-907X    

DOI:10.1002/er.4440100304

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

年代:1986

数据来源: WILEY

摘要:

AbstractA methodology for deriving an analytical, simplified solar system performance prediction model is presented. Factors related to system design can be examined; for example, storage tank temperature variations, solar system turn‐on and turn‐off times and system ‘memory’. A simple domestic water heating type system is used as a basis for illustrating derivation of performance models. Predicted performance results are in good agreement with results obtained from another design method. A generalized procedure is described for deriving new system models. The lumped analysis simulation may prove useful for non‐standard applications where other simplified design methods are not defined and where detailed simulation capability is not

ISSN:0363-907X    

DOI:10.1002/er.4440100305

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

年代:1986

数据来源: WILEY

摘要:

AbstractAn important task when designing point focusing (paraboloidal) solar‐collectors is to model the thermal behaviour of their receivers by an approximate dynamic model in view of thermal loop automatization. In general, this is very difficult or impossible by studying the exact physical phenomena which occur in the receiver. However, approximations can be made and approximate models can always be derived. Using filtering and estimation theory these models can be identified to represent reality very wel

ISSN:0363-907X    

DOI:10.1002/er.4440100306

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

年代:1986

数据来源: WILEY

摘要:

AbstractIn the present work we investigate the effects of a porous medium on the accelerated flow past a vertical porous limiting surface. The solution of the problem is obtained in closed form by using the Laplace transform technique.

ISSN:0363-907X    

DOI:10.1002/er.4440100307

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

年代:1986

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440100301

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

年代:1986

数据来源: WILEY