The surface temperature of the collector should have a proportional increase to get adequate airflow exit. Thus optimum geometry should be designed for the collector. For this purpose, the front and back faces of the collector are coated with foil paper both to constitute new air chambers and to stabilize the surface temperatures. (Figure 9) […]

After having introduced the procedure for mirror deformation reproduction, the first study examines the consequences produced by the deformations of a solar trough collector. The study is based on the use of ray tracing analyses that allow controlling all the optical parameters. Considering the application of sunlight exploitation, the most important features probably are collection […]

The trends and ideas resulting from the series of workshops were analysed and combined into twelve sketches of the solar thermal collector of the future. The purpose of these sketches was to visualise the outcomes from the workshop, and to get an impression of the consequences and feasibility of the realisation of these trends. In […]

In general polymers are incompatible with one another as a result of low entropy of mixing and the positive energy of mixing between polymers. Exceptions to this rule are for example metastable, partly miscible systems which exhibit a Lower Critical Solution Temperature (LCST). At low temperatures the polymers interact via salt formation, hydrogen bonding, complex […]

Examples of integrated storage collector (ICS) of polymeric materials are displayed in Fig. 9 (a) shows an ICS with polypropylene casing and transparent insulation of cellulose triacetate. The ICS in (b) has a moulded storage container in polyethylene, glazing in polycarbonate and heat ex­changer in copper. Example (c) is a recent Brazilian ICS product with […]

Kollektorfabrik has laid the foundations to produce a solar air collector which meets the technical requirements of efficient solar energy usage. This collector complies also with the needs of installers and craftsmen, customers and investors. The field test in private households with heat exchangers for domestic hot water production and direct use of air for […]

The present stagnation temperature studies allow determining the heat loss coefficient and the heat capacity of a collector. In this approach the collector is not necessarily connected to an operating heat removal system (e. g. water). This implies that the absorbed solar irradiance AcIG (ra)e is equal to the heat loss Ac UL (Tabs, m […]

A computer system with a software was designed to obtain air temperatures, velocities and solar radiation data in the classroom. Seven temperature readings were recorded. The graph in Figure 13, shows temperature readings for inside the classroom and air entering – existing the collector. The top vent air (air existing) temperature of the collector on […]