The theoretical effort invested in modeling the CPV receiver with solar cells immersed in liquid has not seen the intensive research and development activity. The studies of thermal model of solar cells have been mostly concentrated on photovoltaic system and hybrid photovoltaic thermal system. Radziemska [9] summarizes the recent progress obtained in the field of […]

P. Shipkovs1*, M. Vanags1, KXebedeva1, G. Kashkarova1, J. Shipkovs1, V. Barkans2 institute of Physical Energetics, Aizkraukles Street 21, Riga LV-1006, Latvia2 Latvian Maritime Academy, Kronvalda Boulevard 6, Riga, LV-1206, Latvia* Corresponding Author, shipkovs@edi. lv Abstract The paper gives the stationary heat conduction process is studied theoretically for flat plate surfaces of the absorber of a […]

The Northeast of Brazil, made up of 8 states, represents 18% of the total area of the country, and is responsible for 16% of the production and it has a population of 42,000,000 people (28%). Approximately half of this area, 760,000 km2, is semi-arid where 17,000,000 people live. The climate of this region is hot […]

Energy use is since 2005 measured in the apartments in two multi-family houses in Vasteras, Sweden, by the housing company. The momentary power required for hot water is continuously registered in every apartment and the hourly data, which the analysis is based on, are averages of a number of such momentary measurements. Measured data from […]

L. Crema1*, G. Cicolini1, A. Bozzoli1 1 Renewable Energies & Environmental Technologies research unit (REET), Fondazione Bruno Kessler (FBK),Via alla Cascata 56/C, I-38050 Povo (Tn), Italy* Corresponding Author, :rema@,fbk. eu Abstract In this work, we propose a solution to convection and conduction heat losses on an solar thermal collector. We have based our work starting […]

The model performance with 2 different airside correlations (Wang et al. [12] for wavy fins and Wang et al. [10] for plain fins) was compared with Type1223new and the producer design software Guntner Product Calculator (GPC) of the company Guntner GmbH. Two staggered tube lay outs available in GPC (HX 1 and HX 2, heat […]

The sensitivity analysis methods are divided in local and global ones. With local sensitivity analysis, the influence of parameters could be estimated only around a certain point in the parameters space. In the case of solar heating system, such an estimation is needed in a wider range of parameters variations, in a certain volume of […]

The energy balance is considered for each component of the CPV receiver: Tc, Tvb and the fluid, Tf and Tfo. Some geometrical characteristics of the CPV receiver and the silicone oil properties are given in Table 1. 3.1. Solar energy model The irradiance absorbed by the vessel top, solar cells and vessel bottom are given […]