A way to increase the efficiency of convective heat exchange in the channels of solar water collectors

Abbasov, E. S.; Umurzakova, M. A.; Nigmatov, U. Zh.

doi:10.3103/s0003701x10010068

Cited by 5 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Applications of solar energy systems for various domains, such the production of hot water, need efficient solar collectors [1][2][3]. High efficiency can be achieved when thermal losses are reduced.…”

Section: Introductionmentioning

confidence: 99%

Intensification of a flat solar collector efficiency

Ferahta

Abid

2018

Eur. Phys. J. Appl. Phys.

View full text Add to dashboard Cite

An experimental study was carried out to investigate the intensification of the efficiency of a flat solar collector. To achieve this aim, we investigated the effect of the thickness of the air gap between the glazing cover and the plate absorber and the effect of presence of transparent partitions in the air gap. Indeed, when the thickness of the air gap is increased, the natural convection is intensified, which induces high thermal losses on the front part of the collector. The result of this study highlights that thicknesses larger than the reference one, given by the manufacturer, decrease the efficiency, while thicknesses smaller than the reference one increase the efficiency. The presence of transparent partitions in the air gap leads to the weakening of the natural convection and thus to the enhancement of the solar collector efficiency. Two situations were studied. In the first one, only transverse partitions were placed in the air gap; in the second one, longitudinal partitions were added to the transverse ones to form a crossed structure of partitions. The obtained results showed that in both situations the enhancement of the efficiency is significant and that the crossed structure induces the better efficiency.

show abstract

Section: Introductionmentioning

confidence: 99%

Intensification of a flat solar collector efficiency

Ferahta

Abid

2018

Eur. Phys. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

Stabilization of parameters of optoelectronic devices on semiconductor emitters

Kuldashov,

Rayimdjanova,

Djalilov

et al. 2024

E3S Web of Conf.

View full text Add to dashboard Cite

The current state of using LEDs for gas analysis, environmental monitoring, hygrometry, medical diagnostics, and communication systems is analyzed. Existing methods for ensuring the stability of LED parameters, their significance, and application in automatic control devices are considered, along with the advantages and disadvantages of building multichannel optical schemes (thermostabilization, thermocompensation, thermostating). It is identified that little attention has been paid to ensuring the stabilization of LED radiation fluxes used in optoelectronic devices for automatic control. A method for stabilizing parameters (radiation power, radiation intensity, radiation flux, peak spectrum, direct current, direct voltage) of LEDs with optical negative feedback has been developed to enhance the measurement accuracy and reliability of optoelectronic devices on semiconductor emitters. A structural diagram of optoelectronic devices on semiconductor emitters has been developed to ensure its temporal stability.

show abstract

Optical electron photo converter

Ergashev,

Dalibekov,

Komilov

et al. 2024

E3S Web of Conf.

View full text Add to dashboard Cite

An optical electron photo converter is a device based on electro-optical transfer phenomena. It is an energy-efficient, high-quality and compact optoelectronic system in the field of instrumentation in the field of information and measurement technology of solar engineering. This converter allows to control technological processes, product quality remotely, without affecting the technological process. The device can operate independently at the expense of renewable energy sources in all types of automatic measurement and control systems of science and technology, without the need for a special source of energy. The power supply of the device can be adapted to work by means of light, heat and magnetic effects of solar energy.

show abstract

A way to increase the efficiency of convective heat exchange in the channels of solar water collectors

Cited by 5 publications

References 0 publications

Intensification of a flat solar collector efficiency

Intensification of a flat solar collector efficiency

Stabilization of parameters of optoelectronic devices on semiconductor emitters

Optical electron photo converter

Contact Info

Product

Resources

About