Ivanovo State Polytechnic University

Any building that consumes energy resources (heat, electricity, etc.) is an indirect emitter of greenhouse gases. Since the combustion of fuel to generate energy resources for its needs is carried out in a thermal power plant, boiler room, etc.

В статье рассматривается управление энергопотреблением как неотъемлемый компонент жизненного цикла объектов капитального строительства. Анализируются ключевые понятия «энергосбережение» и «энергоэффективность» в качестве методологической основы для принятия управленческих решений на всех этапах: от обоснования инвестиций и проектирования до эксплуатации, модернизации и утилизации объекта. Проанализированы правовые и нормативные основы, определяющие требования к энергетическим характеристикам зданий и сооружений. Обоснована необходимость комплексного подхода к управлению, который интегрирует технологические (включая информационное моделирование), организационные и экономические инструменты для достижения целевых показателей энергоэффективности. Предлагается рассматривать энергоэффективность как один из ключевых критериев при оценке эффективности решений в рамках управления жизненным циклом строительных объектов, что требует внедрения современных систем мониторинга и финансового стимулирования.

The success of cultivation is influenced by several factors, one of which is feed. This research was conducted to enhance the quality of feed and evaluate the benefits of incorporating fermented cassava leaf flour into feed on the growth and survival of Nile tilapia (Oreochromis niloticus) fry. The research design used a Completely Randomized Design (CRD). Data analysis involved analysis of variance (ANOVA) and Duncan's test. Three treatment levels and a control were applied in the research. A: Incorporating 15% fermented cassava leaf flour, B: Incorporating 25% fermented cassava leaf flour, C: Incorporating 35% fermented cassava leaf flour, D: Using 100% commercial feed. The study indicated that the inclusion of fermented cassava leaf flour in the feed significantly affected absolute weight growth (p<0.05). The optimal treatment was observed with the incorporation of 15% fermented cassava leaf flour in treatment A, where the average weight of tilapia seeds reached 3.49 g. The highest absolute length growth was recorded at the optimal treatment dose in treatment A, with a value of 2.05 cm in comparison to the other treatments. The survival rate results demonstrated that the highest value of 83% was achieved with the best treatment of 15% fermented cassava leaf flour. The water quality in the rearing media remains within the appropriate range for tilapia cultivation.

This paper investigates the impact of seasonal temperature fluctuations on the operation of industrial compressors working under strictly defined pressure and flow rate parameters. Analysis shows that changes in air density significantly affect compressor performance. Modeling of a K-5500-42-1 centrifugal compressor (two versions) using the SimInTech environment allowed for a comparison of two control methods: air discharge (with energy losses) and the connection of an additional compressor. Modeling results indicate the need for control system optimization to improve energy efficiency and ensure stable compressor operation under various climatic conditions, considering the strict pressure and flow rate requirements. The work highlights the importance of considering the thermodynamic properties of air in the design and operation of industrial compressors.

Shukurov Murodbek Ollamurodogly Resuscitator Children's hospital of the city of Yangiyul Safarboyev Izzat Bohodorovich Resuscitator Children's hospital of the city of YangiyulRelevance.The most common causes of prerenal acute renal failure (ARF) in children are dehydration against the background of acute gastroenteritis, accompanied by fluid loss through the gastrointestinal tract (vomiting, diarrhea), exogenous (poisoning) and endogenous (sepsis) intoxications, and the so-called "losses in the third space" (with burns, nephrotic syndrome, liver diseases).Serious consequences are oliguria / anuria.Early initiation of extracorporeal detoxification helps to prevent the development of multiple organ failure.Numerous studies have supported the concept that antihypertensive therapy slows down the rate of progression of CKD.The negative effect of the anuric phase on erythropoiesis in acute renal failure is known [1][2][3][4].However, there is not enough data to evaluate the effectiveness of anemia correction in the anuric phase in acute renal failure in children under 3 years of age, which served as the basis for this study.Keywords: anemia, acute renal

Objective. Over the past decades, heat pumps have gained great popularity due to their advantages in energy efficiency and environmental friendliness, becoming one of the most attractive alternatives to replace traditional heating systems running on fossil fuels. Heat pump efficiency is a decisive factor that should be taken into account when selecting and optimizing a heat pump system. The aim of the study was to evaluate the efficiency of air source heat pumps of the air-to-water system in the climatic conditions typical of the regions of the Central Federal District. Method. To evaluate the efficiency of air source heat pumps, a mathematical model is used that takes into account the multifactorial nature of the process under study. Result. To adequately compare the obtained research results with the passport performance indicators, the transformation coefficient (COP) was used, showing the ratio of the energy received to the expended work. As a result, the method of heating rooms with an air source heat pump with a combined operation mode was recognized as more preferable. Conclusion. Currently, the potential of heat pumps in the field of energy saving and CO2 emission reduction remains largely untapped, which sets the vector for further research.

To prevent biofouling of cement stone and its damage by fungal microorganisms, it is proposed to introduce 0,5 wt. % calcium stearate into the cement mixture. To ensure volumetric hydrophobization of cement stone, the additive is crushed to nanoparticles. The cement stone was cured in the air for 28 days. To study fungal corrosion, the surface of the cement stone was treated with a suspension of pores of Aspergillus niger fungi. The hydrophobic surface of the cement stone was not biofouled by fungal microorganisms Aspergillus niger during 6 months of the samples being in a humid environment, and black mold foci developed on the surface of ordinary cement stone during this period of time. The action of fungi and their waste products caused a decrease in the amount of calcium in the cement stone by 9 %, and had no effect on the hydrophobized cement stone. Due to the immunity of cement stone with a hydrophobizer to the action of microorganisms and water, free calcium hydroxide is not removed from the structure, but some amount is washed out of the surface layer and the pore liquid. A significant slowdown in mass transfer in cement stone under the action of liquids is provided by the hydrophobicity of the surface of cement stone and the walls of pores and capillaries, imparted by calcium stearate, as well as partial colmatation of the pore structure by means of the introduced additive.

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