摘要:

A modular system for the supply of remote electrical consumers was developed, which makes possible a variable integration of wind energy and photovoltaic plants in connection with a diesel engine and a battery storage. The wind energy converters, equipped with asynchronous generators, and a fast pitch control, work parallel with a synchronous generator. The generator is driven by a diesel engine by means of an overrunning clutch, or started by a small DC-motor. If the diesel is off, or the starting process by the DC-motor is finished, the synchronous generator works as a rotating phase-shifter and takes over voltage control and supply of reactive power.

ISSN:0142-5919    

DOI:10.1080/01425918808914227

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

In this work a theoretical model and experimental measurements of a point-focus photovoltaic concentrator system with passive cooling are presented. A calculation of the optimal configuration with respect to Cost/Wpof the system, bearing in mind reasonable simplicity and low-cost solutions, has been carried out.

ISSN:0142-5919    

DOI:10.1080/01425918808914228

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The computer simulation is a useful tool for heat transfer analysis of the passive solar systems especially in preliminary performance evaluation, implementation, and/or optimization of the system configurations in the course of the development and constructive design.

ISSN:0142-5919    

DOI:10.1080/01425918808914229

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

In the present work an effort will be made to analyze the radiation exchange in enclosures with boundary walls partly transparent to long wave thermal radiation. The objective of the analysis will be to provide a general set of equations describing the radiation exchange between the boundary of the enclosure, the sky and other distant objects when the boundary walls of the enclosure have asymmetric radiative properties and an arbitrary transparence at long wavelengths. The governing equations are sufficiently general to account for surrounding surfaces of an arbitrary number and separately for the radiant heat fluxes exchanged between the boundary of the enclosure and the surfaces surrounding it within and outside the 8-14 μm atmospheric window band. The proposed method is shown to be in good agreement with experiments using a radiating surface covered with polyethylene under solar radiation incidence, as well.

ISSN:0142-5919    

DOI:10.1080/01425918808914230

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The mass culture in sea-water of three different cyanobacterial strains isolated from marine and hypersaline environments is described.

ISSN:0142-5919    

DOI:10.1080/01425918808914231

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor