logo
calendar7 Fevral 2026
view41
Main language:Uzbek

CALCULATION OF ENERGY SAVED BY SUBSTRATE TEMPERATURE STABILIZATION USING EXCESS HEAT IN A SOLAR-BIOGAS HYBRID SYSTEM (FOR NAMANGAN CONDITIONS)

Field of Science:
pdf

6987172a84183.pdf

PDF

ALTERNATIVE ENERGY

ALTERNATIVE ENERGY

Publish Articlesee more

ARTICLE ANNOTATION

quote
Abstract. Introduction. In this article, a PV/T hybrid system was developed in the conditions of Namangan, which ensures stable operation of the substrate of biogas reactors at mesophilic temperature (35-40 °C) by effectively using excess heat generated in photovoltaic modules. Although PV modules play an important role in converting solar energy into electrical energy, their efficiency decreases due to excess heat generated on their surface during operation. This heat, in most cases, simply dissipates into the atmosphere. Methods and materials. The heat generated on the surface of the photoelectric module itself has great energy potential. If it is collected through a fluid circuit, heat can be extracted from each module. Thanks to this, a decrease in the temperature of the photovoltaic module is achieved, along with an increase in the efficiency of generation, the transfer of accumulated heat to the liquid or air. Results. The research results showed that the transfer of heat, rising to 60-75 °C on the surface of photovoltaic panels, into the biogas reactor through a special liquid circuit reduces the load of the electric heater by 40-60%. It has been established that PV/T collectors generate 1.2-2.0 kWh_th/m2 of heat per day, and an area of 5-6 m2 is sufficient to maintain a small-volume (300 L) reactor in mesophilic mode. The integrated system will save 500-800 kWh of electricity per year and increase methane yield by 15-25%. Conclusion. Biogas reactors operate effectively in mesophilic mode. A 5°C decrease in temperature reduces methane yield by 20-30%. Therefore, heat transfer through the PV/T collector not only reduces the load on the electric heater.

AUTHORS

M.Murodov

Namangan davlat texnika universiteti,

A.Axmedov

Namangan davlat texnika universiteti,

Tags

# energy saving# энергосбережение# quyosh energiyasi# солнечная энергия# solar energy# биогаз# biogas# теплообменник# heat exchange# biogaz# energiya tejash# PV/T# fototermal tizimlar# substrat harorati# mezofil rejim# issiqlik almashinuvchisi# fermentatsiya jarayoni# фототермальные системы# температура субстрата# мезофильный режим# процесс ферментации# photothermal systems# substrate temperature# mesophilic mode# fermentation process

OTHER ARTICLES IN THIS JOURNAL

Rate Article

0
0 ratings
5
4
3
2
1

Article Identifiers

ROI:

https://eroi.uz/11.0032/A0226-0002

DOI:

Not Available

References

Wu, Xuan & Liang, Jingkang & Yao, Haoyi & Wang, Yunfeng. (2022). A Review of Solar Energy Use in Biogas Digester Heating. Journal of Solar Energy Research Updates. 9. 70-81. https://doi.org/10.31875/2410-2199.2022.09.07

Kazem, Hussein A & Chaichan, Miqdam & Al-Waeli, Ali & Sopian, Kamaruzzaman & Alnaser, Waheeb & Kazmerski, Lawrence & Alnaser, Naser. (2025). A review of photovoltaic/thermal (PV/T) incorporation in the hydrogen production process. Global Energy Interconnection. 8. https://doi.org/10.1016/j.gloei.2025.03.001.

Murodov, Muzaffar & Nabiev, Murodjon & Hababa, Mohamad. (2023). Calculation of the thermal balance of the photocell during operation and removal of heat. E3S Web of Conferences. 434. 01033. https://doi.org/10.1051/e3sconf/202343401033

Duffie, J.A. and Beckman, W.A. (2013) Solar Engineering of Thermal Processes. 4th Edition, John Wiley & Sons, New York.https://doi.org/10.1002/9781118671603

Choi, H.-U., & Choi, K.-H. (2020). Performance Evaluation of PV/T Air Collector Having a Single-Pass Double-Flow Air Channel and Non-Uniform Cross-Section Transverse Rib. Energies, 13(9), 2203. https://doi.org/10.3390/en13092203.

T.M. Alkhamis, R. El-Khazali, M.M. Kablan, M.A. Alhusein, Heating of a biogas reactor using a solar energy system with temperature control unit, Solar Energy, Volume 69, Issue 3, 2000, Pages 239-247, ISSN 0038-092X, https://doi.org/10.1016/S0038-092X(00)00068-2.

Muminov, R & Tursunov, M & Sabirov, Kh & Abilfayziyev, Sh & Yuldoshov, B & Toshpulatov, Sirojiddin. (2022). Testing of crystalline silicon-based photoelectric and photothermal batteries in real climate conditions and comparison of parameter changes. Journal of Physics: Conference Series. 2388. 012128. DOI:10.1088/1742-6596/2388/1/012128.

Murodov, Muzaffar & Nabiev, Murodjon & Hababa, Mohamad. (2023). Calculation of the thermal balance of the photocell during operation and removal of heat. E3S Web of Conferences. 434. 01033. https://doi.org/10.1051/e3sconf/202343401033

Duffie, J.A. and Beckman, W.A. (2013) Solar Engineering of Thermal Processes. 4th Edition, John Wiley & Sons, New York.https://doi.org/10.1002/9781118671603

Choi, H.-U., & Choi, K.-H. (2020). Performance Evaluation of PV/T Air Collector Having a Single-Pass Double-Flow Air Channel and Non-Uniform Cross-Section Transverse Rib. Energies, 13(9), 2203. https://doi.org/10.3390/en13092203.

T.M. Alkhamis, R. El-Khazali, M.M. Kablan, M.A. Alhusein, Heating of a biogas reactor using a solar energy system with temperature control unit, Solar Energy, Volume 69, Issue 3, 2000, Pages 239-247, ISSN 0038-092X, https://doi.org/10.1016/S0038-092X(00)00068-2.

Muminov, R & Tursunov, M & Sabirov, Kh & Abilfayziyev, Sh & Yuldoshov, B & Toshpulatov, Sirojiddin. (2022). Testing of crystalline silicon-based photoelectric and photothermal batteries in real climate conditions and comparison of parameter changes. Journal of Physics: Conference Series. 2388. 012128. DOI:10.1088/1742-6596/2388/1/012128.

Wu, Xuan & Liang, Jingkang & Yao, Haoyi & Wang, Yunfeng. (2022). A Review of Solar Energy Use in Biogas Digester Heating. Journal of Solar Energy Research Updates. 9. 70-81. https://doi.org/10.31875/2410-2199.2022.09.07

Kazem, Hussein A & Chaichan, Miqdam & Al-Waeli, Ali & Sopian, Kamaruzzaman & Alnaser, Waheeb & Kazmerski, Lawrence & Alnaser, Naser. (2025). A review of photovoltaic/thermal (PV/T) incorporation in the hydrogen production process. Global Energy Interconnection. 8. https://doi.org/10.1016/j.gloei.2025.03.001.