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 […]

Assuming that the process is stationary, the temperature field in the OiABC section in the Descartes coordinate system O1xz with O1 as the initial point is described by the Laplace equation [4] : 52 71 52 71 (1) 1 1 = 0, дx2 dz2 We will introduce dimensionless variables and parameters [5], the dimensionless temperatures […]

The GIS (Geographic Information System) is a tool for computational treatment of geographical data and their associated data banks. It can be seen as a system of support for decision that unites spatially referenced data in an ambient of replies to problems. SIG groups, brings together and unites information. Through this available information becomes more […]

To estimate the validity of the model developed to generate DHW (Domestic Hot Water) profiles from time-use data the modelled profile for an average household member living in an apartment was compared to measured data. Figure 1 shows the hourly distribution for a weekday and a weekend day when averaged over six analysed measured months. […]

1.1. Problem description When solar radiation come to an absorber layer, the spectral response of the ideal material should allow an absorbance on the bandwidth of incoming radiation and an emittance completely shifted in a different bandwidth. In this case all incoming radiation would be transferred into thermal radiation. Part of this radiation is lost […]

Ricardo Aguiar*, Ricardo Coelho, Pedro Horta and Maria Joao Carvalho INETI, Department of Renewable Energies, Lisbon, Portugal* E-Mail: ricardo. aguiar@ineti. pt, Tel: +351 210 924 602 Introduction The influence of the incidence angle 0 on the performance of solar collectors has long been recognised and is accounted for in collector testing, as well as in […]

This method is qualitative and only ranks parameters by its importance which means influence on the target function [2]. However, it also allows to determine whether the parameters have linear or non­linear effects on the target function or if they are involved in interactions with other parameters. The Morris method is based on the so-called […]

R. Kicsiny* and I. Farkas Szent Istvan University, Department of Physics and Process Control, Pater K. u. 1., Godollo, H-2103 Hungary Corresponding Author, Kicsiny. Richard@gek. szie. hu Abstract This paper introduces the realization and application of a block-oriented type physically-based model of solar heated thermal systems which is able to work with inputs from either […]