摘要:

AbstractA scheme is described for the recovery of waste heat from stacks of gas turbine engines by means of heat‐pipe loops. The recovered energy is supplied to an absorption chiller that cools the intake air of the gas turbine engine to enhance its performance. Mathematical expressions are introduced which accurately portray existing tabulated thermophysical properties data for those variables needed during the modelling of the said syste

ISSN:0363-907X    

DOI:10.1002/er.4440180702

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

年代:1994

数据来源: WILEY

摘要:

AbstractPrediction of annual energy consumption requires the partial load performance evaluation of each component in an air conditioning system. A packed‐type or a coil‐type liquid desiccant apparatus is an essential component of a hybrid liquid desiccant system. Therefore, predicting the hour by hour performance of a packed‐type hybrid liquid desiccant system to estimate its annual energy consumption requires that the performance of a packed‐type system be known at partial load conditions. For this purpose a detailed sensitivity analysis of heat and mass transfer performance of a packed‐type liquid desiccant system is carried out to identify important performance parameters. Two output parameters — enthalpy effectiveness and humidity effectiveness — are defined to present the results. Based on the conclusions drawn from the detailed sensitivity analysis, a simple model is developed to predict the performance of an absorber and a regenerator at partial load operating conditions. Performance predictions using the simple model are compared with the predictions from the detailed analysis along with another existing model which is available in the literature. The simple model is in excellent agreement with the predictions of oth

ISSN:0363-907X    

DOI:10.1002/er.4440180703

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

年代:1994

数据来源: WILEY

摘要:

AbstractThis paper describes a novel rotary absorption system which could be used in industrial processes such as distillation, concentration and water desalination. The absorption system employs process intensification which exploits centrifugal fields. The system has been analysed thermodynamically using H2O/LiBr pair.

ISSN:0363-907X    

DOI:10.1002/er.4440180704

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

年代:1994

数据来源: WILEY

摘要:

AbstractWhen exposed to high‐temperature steam over extended time periods, heat transfer surfaces in power plants can be degraded by corrosive deposits of various oxidation products commonly known as scale. Solid particles can exfoliate from these surfaces, move downstream, and erode costly power‐generation equipment, including turbine valve stems, nozzle blocks, turbine diaphragms, turbine buckets etc. In addition, the heat transfer efficiency is substantially reduced. Such effects can be severe and can significantly increase capital expenses, fuel and operating costs unless abated by various techniques, among which the most common are mechanical and chemical cleaning. In this paper we analyse the use of foams as an alternative chemical cleaning method, and use a network of parallel tubes to stimulate key process and performance variables in chemical and foam cleaning. Among the process (or control) variables are: rheological properties of the foams, foam quality, inlet flow rates, network geometry, and injection strategy. Among the performance variables are: distributions of residence times, of flow, and of quality, pressure drops, and energy requirements. From this analysis we conclude that chemical‐foam cleaning offers technical as well as economic advantages over conventional cleaning me

ISSN:0363-907X    

DOI:10.1002/er.4440180705

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

年代:1994

数据来源: WILEY

摘要:

AbstractA numerical solution to the eigenvalue problem of MHD stability of Couette flow between concentric rotating cylinders with nonconducting walls, is presented here. The numerical values of the critical Taylor number,Tac, and the critical wave number,acare listed in a table for different values of η (ratio of the two radii), μ (ratio of the angular velocities of the two cylinders) andQ, the magnetic field parameter. It is observed that, owing to an increase in the gap‐width,Tacdecreases or the flow becomes destabilized.acincreases with increasingQand μ0 and by increasing the width between two cyli

ISSN:0363-907X    

DOI:10.1002/er.4440180706

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

年代:1994

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440180707

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

年代:1994

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440180708

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

年代:1994

数据来源: WILEY

ISSN:0363-907X    

DOI:10.1002/er.4440180701

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

年代:1994

数据来源: WILEY