Showing 91 - 100 of 4,475
This paper describes the design and development stages to convert a conventional refrigerator to a solar powered one. The development of such a system was effected and the results of this work to provide a cost effective version are given.
Persistent link: https://www.econbiz.de/10010803681
The performances of a photovoltaic pumping system based on an induction motor are degraded once insolation varies far from the value called nominal, where the system was sized. To surmount this handicap, an improvement of these performances by the optimization of the motor efficiency is...
Persistent link: https://www.econbiz.de/10010803770
In most of the maximum power point tracking (MPPT) methods described currently in the literature, the optimal operation point of the photovoltaic (PV) systems is estimated by linear approximations. However these approximations can lead to less than optimal operating conditions and hence reduce...
Persistent link: https://www.econbiz.de/10010804218
The paper summarizes Japanese activities in the field of photovoltaic system R&D. Last year 1994 was just the 20th anniversary of the Sunshine Project, which started in July 1974. Although there have been a variety of R&D including stand-alone applications in the Project, the utility-connected,...
Persistent link: https://www.econbiz.de/10010804524
This paper is about predicting the average conventional energy conversion by a photovoltaic system in Malaysia. The calculation is based on average number of days in a month. Average hourly energy flows are estimated based on knowledge of array test parameters, monthly average of hourly ambient...
Persistent link: https://www.econbiz.de/10010804987
This paper proposes a method of maximum power point tracking using adaptive fuzzy logic control for grid-connected photovoltaic systems. The system is composed of a boost converter and a single-phase inverter connected to a utility grid. The maximum power point tracking control is based on...
Persistent link: https://www.econbiz.de/10010804994
We make a brief analysis of the evolution of photovoltaic systems, highlighting the present situation worldwide and in Brazil. We compare costs of energy generation associated to photovoltaic and to coal-fired power plants. Coal-fired generation represents the eligible choice for the Brazilian...
Persistent link: https://www.econbiz.de/10010805155
As of today, the considerable influence of select environmental variables, especially irradiance intensity, must still be accounted for whenever discussing the performance of a solar system. Therefore, an extensive, dependable modeling method is required in investigating the most suitable...
Persistent link: https://www.econbiz.de/10010676035
This paper presents modeling approaches for step-up grid-connected photovoltaic systems intended to provide analytical tools for control design. The first approach is based on a voltage source representation of the bulk capacitor interacting with the grid-connected inverter, which is a common...
Persistent link: https://www.econbiz.de/10010676137
Energy analysis, environmental life-cycle assessment (LCA) and economic appraisals have been utilised to study the performance of a domestic building integrated photovoltaic (BIPV) system on a ‘whole systems’ basis. Energy analysis determined that the system paid back its embodied energy in...
Persistent link: https://www.econbiz.de/10010597301