Kyrgyz Uzbek University

Osh, Kyrgyzstan

Kyrgyz Uzbek University

Osh, Kyrgyzstan
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Ismanzhanov A.I.,Kyrgyz Uzbek University | Tashiev N.M.,Osh Technological University
Applied Solar Energy (English translation of Geliotekhnika) | Year: 2016

This paper presents the results of studies on the development of the technology for powdering agricultural products using solar energy. It is found that the evaporation of moisture from crushed products (pasty mass) is similar to the evaporation from the free water surface. It is much more intensive than the evaporation from noncrushed products and usually consists of one stage. © 2016, Allerton Press, Inc.


Ismanzhanov A.I.,Kyrgyz Uzbek University | Murzakulov N.A.,Osh Technological University | Ismanzhanova A.K.,National Academy of science of Kyrgyzstan
Applied Solar Energy (English translation of Geliotekhnika) | Year: 2014

The optical-energy and thermal-insulation properties of a two-layer clear coat for solar green-houses based on flat glass and plastic film have been investigated. The coat has good light-transmission and high thermal-insulation properties compared to single transparent coatings, viz., glass and polyethylene. © 2014 Allerton Press, Inc.


Klychev S.I.,Academy of Sciences of Uzbekistan | Ismanzhanov A.I.,Kyrgyz Uzbek University | Ermekova Z.K.,Kyrgyz Uzbek University
Applied Solar Energy (English translation of Geliotekhnika) | Year: 2015

Instantaneous and average cosine factors of low-potential solar installations (LPSIs), i.e., fixed and single-axis tracking collectors, and solar batteries, are investigated. It is confirmed that in the case of year-round operation the optimum tilt to the horizon of a fixed LPSI is close to the site’s latitude. It is shown that for a fixed LPSI in the case of permissible variations of the solar flux on a receiver at ±20%, the daily LPSI operation time for Uzbekistan’s latitudes is about eight hours. It is also shown that depending on the season of the year the single-axis tracking increases the average cosine factor by 6–14% if the LPSI is active six hours a day and by 14–30% if it is active nine hours a day. The instantaneous cosine factor increase using tracking is more significant and is 25–50% after 3:00 p.m. and 50–100% after 4:00 p.m., depending on the season. The effect of discrete additional turns of a single-axis tracking LPSI manifests itself for the average cosine factor only in the winter time and ranges from 11 to 15%. © 2015, Allerton Press, Inc.


Ismanzhanov A.I.,Kyrgyz Uzbek University | Ismanzhanov A.I.,Academy of Sciences of Uzbekistan | Rasakhodzhaev B.S.,Kyrgyz Uzbek University | Rasakhodzhaev B.S.,Academy of Sciences of Uzbekistan
Applied Solar Energy (English translation of Geliotekhnika) | Year: 2011

Soil solar water heating collectors (SWHCs) are the subject of consideration; their bottom part is a layer of insulation-soil or air-soil. Soil temperature fluctuations and heat emissions have been investigated through the soil bottom. The heat emissions in SWHCs and water heating collectors are quite similar. © 2011 Allerton Press, Inc.

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