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Objectives Atmospheric pressure is the most objective weather factor because regardless of if outdoors or indoors it affects all objects in the same way. The majority of previous studies have used the average daily values of atmospheric pressure in a bioclimatic analysis and have found no correlation with blood pressure changes. The main objective of our research was to assess the relationship between...
The photovoltaics is approaching the threshold of economical feasibility and various incentives for its development are being reduced in favour of low feed-in tariffs. For the household, the benefits from having a PV-system are shifting from selling energy to self consumption of PV energy. The paper investigates the sizing of PV-system for a household with feed-in tariffs lower than purchase tariffs...
Performance of photovoltaic systems greatly depends on climate conditions. Apart from values of solar radiation, its variations can also have an influence on energy yield from a PV-system. In less favourable climate conditions (e.g. in central Europe), highly varying radiation is very frequent and the electrical converters (i.e. inverters, DC-DC converters) should be able to follow the irradiance...
A laboratory setup for investigation of maximum power point trackers (MPPT) for photovoltaic (PV) modules is presented. It is composed of a PV module, an artificial light source and a universal maximum MPPT circuit. The PV module has been customised so that to enable investigation of partial shadowing effects and related countermeasures. Halogen lamps provide a constant irradiation and pulse operation...
The inverter is the key element in grid-connected photovoltaic systems. Measurements of inverter efficiency should take into account two phenomena: the DC/AC conversion and Maximum Power Point (MPP) tracking process.
Performance of photovoltaic systems greatly depends on climate conditions. Apart from values of solar radiation and ambient air temperature, highly varying radiation can also have an influence on energy yield from a PV-system. In less favourable climate conditions (e.g. in central Europe), highly varying radiation is very frequent and the accurate energy yield predictions from PV-systems require introducing...
Electrical energy is used most efficiently when it is produced on demand and consumed locally, without costly long-distance distribution system or troublesome storage. For renewable energy source, like wind or sunlight, finding such applications is difficult due to their limited predictability and the mismatch between energy availability and demand.
The paper presents the temperature measurement and thermal conditions analysis system for the photovoltaic generator, located in the Department of Microelectronics and Computer Science, at Technical University of Łódź. The work is a part of a comprehensive monitoring system to study dynamic behavior of photovoltaic devices in real-life conditions. The design of a custom microcontroller system and...
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