Energy audit and energy efficiency of modular military towns

Gamayunova, Olga; Radaev, Anton; Petrichenko, Mikhail; Shushunova, Natalia

doi:10.1051/e3sconf/201911001088

Cited by 6 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The importance of developing a sustainable society and future has become a wellconsolidate commitment [1][2][3]. Several efforts have been placed in the last few decades to limit the impact of human development on nature [4][5][6][7][8][9]. The production of cleaner energy from non-fossil sources has nowadays become a cardinal leading mission in several industrialized countries [10].…”

Section: Introductionmentioning

confidence: 99%

Efficiency Improvement of Photovoltaic Modules via Back Surface Cooling

et al. 2021

View full text Add to dashboard Cite

Crystalline silicon photovoltaics are a cardinal and well-consolidated technology for the achievement of energy efficiency goals, being installed worldwide for the production of clean electrical energy. However, their performance is strongly penalized by the thermal drift, mostly in periods of high solar radiation where solar cells reach considerably high temperatures. To limit this aspect, the employment of cooling systems appears a promising and viable solution. For this purpose, four different cooling systems, working on the photovoltaic (PV) panel back surface, were proposed and investigated in an experimental set-up located at the University of Calabria (Italy). Hourly electrical output power and efficiency were provided accounting for different meteorological conditions in several months of the experimental campaign. The results demonstrated that a simple spray cooling technique can provide an absolute increment of electrical efficiency of up to 1.6% and an average percentage increment of daily energy of up to 8% in hot months. More complex systems, based on ventilation or combining spray cooling and ventilation, were demonstrated not to be a viable option for PV performance improvement.

show abstract

Section: Introductionmentioning

confidence: 99%

Efficiency Improvement of Photovoltaic Modules via Back Surface Cooling

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Из-за пористости материала перепад темпе- 1 Тепловая защита зданий (актуализированная редакция СНиП 23-02-2003 (с Изменением № 1)) : (СП 50.13330.2012) : утвержден приказом Министерства регионального развития Российской Федерации (Минрегион России) от 30 июня 2012 г. № 265 и введен в действие с 1 июля 2013 г. ратур может приводить к трещинообразованию в ограждающей конструкции [7][8][9].…”

Section: Introductionunclassified

Determination of active and reactive thermal resistance of one-layer building envelopes

et al. 2020

View full text Add to dashboard Cite

Introduction. The subject of the study is the individual characteristics of a 0.51 m thick external single-layer building envelope made of solid ceramic bricks. The paper focuses on the heat engineering parameters of the wall, namely, the calculation of active and reactive thermal resistances. We determine the differences between the two types of resistances. We also provide an example of calculating the thermal boundary layer in which all temperature fluctuations occur and determining the amount of heat absorbed and released by the envelope. Materials and methods. We give consideration to taking into account the two components of thermal resistance based on wave functions — thermal and temperature waves. Active thermal resistance is determined at any point of the building envelope with a fixed time value t (stationary heat transfer mode). The coordinate is recorded when determining total resistance. To calculate the thickness of the envelope thermal boundary layer, the temperature differential from −30 to 40 °С outside the premises is considered, the temperature inside the premises is assumed to be 18 °С. The temperature differential value is calculated from the ratio of the difference between current temperatures and the initial value. The required heat quantity and heat output are calculated using standard thermal physics formulas. Results. The difference between active and reactive thermal resistances, which together make up total thermal resistance, was proved. Active resistance is always 1.57 times less than total resistance. In this case, the active resistance will drop as the temperature differential decreases, and will increase when the outside temperature is higher than the temperature inside the premise. The thermal boundary layer thickness is always less than half of the envelope thickness. Conclusions. Using this method, it is sufficient to calculate the active thermal resistance of the building envelope to determine the remaining values. In addition, the greater the temperature differential, the thicker the temperature boundary layer, i.e. all temperature changes occur only in this layer while the rest of the envelope functions as a thermal accumulator. When the outside ambient temperature drops, all accumulated heat will be transferred into the premise. Such an envelope can be used to heat the premise or to direct this heat to various envelope elements.

show abstract

Heat and Moisture Transfer in Building Enclosing Structures

Zubarev

Gagarin

2021

XIV International Scientific Conference “INTERAGROMASH 2021”

View full text Add to dashboard Cite

Energy audit and energy efficiency of modular military towns

Cited by 6 publications

References 3 publications

Efficiency Improvement of Photovoltaic Modules via Back Surface Cooling

Efficiency Improvement of Photovoltaic Modules via Back Surface Cooling

Determination of active and reactive thermal resistance of one-layer building envelopes

Heat and Moisture Transfer in Building Enclosing Structures

Contact Info

Product

Resources

About