Mathematical model of solar flat-plate liquid collector has been transformed into design tool KOLEKTOR 2.2. The design tool is a computer program with user-friendly interface created in Visual Basic Studio environment. Detailed geometrical and physical parameters of individual solar collector parts are entered through appropriate tool cards (general design parameters, absorber, glazing / insulation, calculation, […]

G. Oliveti, N. Arcuri, M. De Simone, R. Bruno, Department of Mechanical Engineering – University of Calabria87036 – P. Bucci 44/ C – Rende (CS) – ITALYM. De Simone, marilena. desimone@unical. it Abstract A critical analysis of the calculation procedure of solar gain in buildings with reference to an attached sunspace bordering air conditioned environments […]

Emission and distribution are the same for three cases. For distribution, it consists in cold water and hot water pipe network. Pipe losses are taken into account as well as pumps consumption (80% of pipe losses are recovered by building). Pump for hot network is only operating when there is a heating demand while cold […]

1.1. Principal menu The SIGA SOL 1.0 ( Geographic Information System Applied to Solar Energy) is made up of three principal blocks: management, planning, and updating of data bank., according to what can be seen in Fig. 1. Management and planning occur at two levels: macro-spatial (state) and local (municipal). The updating of data bank […]

Fig.3. shows the simulation results of the temperatures of the solar collector, the heat storage tank, the boiler and the DHW use. Fig.4. shows the simulation results of the solar radiation on the collector, the collected solar energy and the DHW heating load. Figs.3 and 4 show the results for the collector tilt angle of […]

It is of major importance to determine the influence of the fluid medium and the fluid dynamics inside the collector on the heat transfer. The heat transfer through a surface depends not only on the thickness and the heat conductivity of the material but also – and in some cases even predominantly – on the […]

The display of the velocity profile was completed in Figure 3. Velocity was observed to increase with the longitudinal length and then decrease as it gets closer to the top of the collector. This can be explained by the accumulation of hot water at the top of the collector reducing the velocity boundary layer and […]

In order to carry out investigations and to describe an established collector we developed an input mask in which all relevant geometrical and material data can be entered. A macro is generated from this information that completely describes the collector and that can be executed by OptiCAD. For instance, different types of CPC-reflectors can be […]