Investigation of the characteristics of a radioisotope source based on a (Y)PO4/(238Pu) self-glowing crystal and an AlxGai_ xAs/GaAs photovoltaic converter

The possibility of creating of a radioisotope source of energy based on a radio-luminescent crystal of YPO 4:Eu/(238 Pu) and AlxGa1-xAs/GaAs photovoltaic converter is demonstrated and its characteristics are analyzed. A prototype of an ecologically safe radioisotope source with low content (< 0.1%) of the 238Pu isotope, efficiency of ~1.4%, and long service life has been developed.

Dependence of the increase in the power reserve of an electric vehicle on the season when using a non-flat battery of photovoltaic converters

Due to the fight against CO2 emissions and other harmful substances, the world’s leading vendors of motor vehicles (MV) come back to development of electric vehicles (EV) as the most environmentally friendly transport. But EV has inadequate power reserve from one accumulators charge. One of the ways to increase it is to use additional environmentally friendly electrical energy sources, e.g., photovoltaic converter (PVC) batteries due to the increase in their efficiency. In order to improve aerodynamic, design and consumer properties, the world’s leading EV manufacturers pass from flat PVC battery to non-flat. Non-flat PVC batteries compared with flat have insufficient energy efficiency, which can be increased in several ways, including PVC battery segmentation. In scientific publications, there are no methods for calculating non-flat PVC batteries, which indicates the actuality of the research being conducted. Mathematical modeling of the EV power reserve depending on the season allows us to justify the actuality of segmenting the non-flat PVC batteries installed on the EV. Materials for the mathematical modeling of nonlinear interaction are obtained experimentally, the method of conducting experimental research is scientifically justified. As a result of the mathematical modeling, the dependences of EV power reserve on the season at different standard test cycles were obtained. The obtained dependences of the EV power reserve on the season allow us to assume the feasibility of segmenting the PVC batteries installed on the EV to increase the energy output and EV power reserve from one accumulators charge.

Динамика влажности воздуха в концентраторном фотоэлектрическом модуле с устройством осушения

Investigations of relative air humidity variation dynamics in the internal environment of a concentrator photovoltaic module with a dehumidifier filled with a moisture absorbing material made of silica gel have been carried out. The device design for drying the internal air of the module to prevent moisture condensation on the Fresnel lens, photovoltaic converter and module case surfaces has been developed. Under unfavorable environmental conditions (relative air humidity up to 95%), the decrease of the module internal air relative humidity down to 25-55% at cyclic temperature change inside the module from 150С to 450С and the increase of the dew point deficit up to 10-250С have been achieved.