in this paper, the performance evaluation of a two-way hybrid photovoltaic/thermal (pv/t) solar collector was analytically and experimentally carried out. mathematical expressions for operating parameters in glass to glass and glass to tedlar pv/t solar collectors were developed and experimentally validated by a glass to tedlar pv/t solar collector system. also the influence of air flow rate on...

This article discusses the study of energy-saving technologies that have become a topical issue today. Types solar heating collectors, principles operation, and their constructive structure were studied. A new technology developed based on analyses proposed to dry agricultural products. Also, in current presentation, used context reduction issues been considered. Experimental experiments are al...

This paper deals with realization and implementation of a new type fractional order controllers (FOC) based on programmable logic controllers series BR 2005 and their utilization to temperature control with big time constant. As the object was used electrical heater, where controlled value is the temperature of hot air, which is fluctuant from heater.

This study discussed the effect of ribbed fin, which was suggested by authors, on enhancement heat transfer and flow characteristics fluid in a solar air heater. The fin has rectangular rib at base side surfaces fin. Thus, it can increase coefficient field heater as well extend area. simulation performed with various Reynolds numbers, relative heights, pitches rib. presence enhances performance...

<em>Solar water heater is a device that uses solar collectors to absorb radiation and convert it into heat energy water. The type of collector the flow rate used affect thermal efficiency heater. This research with serpentine configuration copper pipe material applies 1 lpm. purpose this determine effect on produced by configuration. quantitative research, experimental methods. was conduc...

Exercise I. Optimization of a heater. We want to optimize the temperature T of a room Ω by the mean of a heater ω whose heat flux v ∈ L(ω) is controlled. An air stream of velocity u fills the room. We assume that the air is incompressible, that is u is assumed to be divergence free. Moreover, u is also assumed to be regular. The temperature on the boundary of the room is equal to the external t...

Supplementing fossil fuels with solar air tempering for brooding young livestock could reduce energy use and improve indoor quality. Metal transpired collectors (TSC) are effective but too expensive heating buildings. An inexpensive 12.7 m2 dark grey landscape-fabric-based collector (fTSC) was evaluated in a swine nursery two herds of pigs. A fraction the fTSC area underlain phase change materi...

To enhance the thermal performance of solar air heaters (SAHs), protrusion ribs on absorber are considered to be an attractive solution due their several advantages. These do not cause a significant pressure drop in SAH duct and help heat transfer flowing air. On other hand, degree roughness rib can produced by pressing indenting device without adding additional mass. In this paper, thermo-hydr...

The article discusses a method for calculating the temperature of solar air heater absorber under conditions still in collector and low forced convection. problem determining tst is considered climatic Fergana, with horizontal when radiation passes through double glass. It assumed that over short period time, constant heat loss insulation bottom negligible. Solar ordinary transparent colorless ...