The article presents the world forecast for the development of the heat and power industry for the production of heat and electricity. It is noted that the increase in the production of types of energy is associated not only with an increase in the consumption of fossil fuels, but also with the deterioration of the environmental situation. Taking into account the foreign experience of using solar installations producing thermal energy and favorable climatic conditions of the Republic of Uzbekistan, the prospects of using solar air heaters for heating existing residential buildings were discussed. providing residential buildings and drying plants with heat energy without expensive constructive and technological solutions, as well as carrying out rapid heating of premises. Such a collector, despite the fact that the air has a lower heat capacity, can provide an even distribution of heat, it is well regulated both in temperature and in the amount of air supplied. In addition, collectors operating under natural convection conditions can be successfully combined with a traditional heating system.
At the same time, the article also shows a positive experience of using air heaters in drying technology. In particular, an industrial prototype of a solar air heater was used to dry the windings of transformers used in pumping stations of irrigation systems for the water sector of the Republic. It is shown that the use of air heaters allows saving not only significant fuel, energy and monetary resources, but also strengthening the energy security of the Republic of Uzbekistan.
SUMMARY
On the article "The role of solar heaters in the thermal energy industry and the prospects for their development in the Republic of Uzbekistan"
The article discusses the use of solar heaters in the conditions of the Republic of Uzbekistan during the heating season to support traditional heating systems.
As is well known, solar energy is the most prepared form of all existing alternative energy sources, which can be used, partial and in some cases completely, as a replacement to the heating system in the residential or public buildings. More acceptable devices that provide this heating can be considered solar air heaters.
Such a collector, despite air’s low heat capacity, can provide an even distribution of heat, well-regulated both by temperature and by the amount of air supplied. The Republic of Uzbekistan is in a favorable geographical area for such collector because solar energy in the country can be practically used for 10 months of the year, of course, considering the variable nature of solar insolation.
The author of the article shows that with the volume of housing stock of Uzbekistan at 507,5 million m2 (private housing fund is 504,1 million m2 as of January 1, 2018), 4 months’ heating cost during the heating season can make up 4,6 trillion soums.
Preliminary calculations show that the use of solar air heaters in buildings heating systems, at least as an auxiliary source of thermal energy, provides significant savings in natural gas.
For example, during the coldest months in the country – December and January- the savings can comprise 0,26 to 0,23 trillion soums. The article presents an experimental sample of the solar air heater, as well as describes the positive results of using solar air heaters for drying transformer windings.
The operation of mine compressors in the mining industry is one of the energy-consuming processes that require resource saving. In the balance of mining enterprises, the specific weight of compressor equipment that produces compressed air as pneumatic energy is 20-35% and its further improvement affects the indicators of subsequent technological processes. The widespread use of compressed air requires the need to reduce operating costs by developing effective technical solutions in the process of producing compressed air at industrial enterprises and increasing the energy efficiency of operating compressor units.
To date, a number of significant shortcomings of the cooling system caused by the peculiarities of the principle of their operation have been identified throughout the world during the operation of mine compressor units. Thus, the undercooling of air in reciprocating compressors for every 5-6℃ increases the energy consumption for air compression by 1%, and the productivity decreases by 8-10%, which leads to significant economic losses in the production of compressed air.
In this regard, there is a need to study the influence of the quality of compressed air cooling on the efficiency of the compressor unit, to develop scientific foundations for improving the efficiency of mine compressor units by improving their cooling system, to develop a device for softening make-up water.
The article presents the results of the analysis of data on air pollution in the cities of the Republic of Uzbekistan (RUz) in 2021 based on the reporting data of the Service for Monitoring Air Pollution, Surface Water and Soil of the Center for Hydrometeorological Service of the Republic of Uzbekistan. Analyzed data on the study of the concentration of the main pollutants: dust, sulfur dioxide, carbon monoxide, nitrogen dioxide and oxide, ozone, as well as specific impurities and heavy metals. The results showed that the average annual concentrations of all pollutants under consideration did not exceed the maximum allowable concentrations, only in the atmospheric air of some cities was an excess of the average daily maximum allowable concentrations (MPC) observed. Pollution index. The atmospheric air pollution index (API) in the cities was in the range of 1.38-4.85.
The article presents the results of the analysis of data on air pollution in the cities of the Republic of Uzbekistan (RUz) for 2018 based on the reporting data of the Service for Monitoring Air Pollution, Surface Water and Soil of the Center for Hydrometeorological Service of the Republic of Uzbekistan. Analyzed data on the study of the concentration of the main pollutants: dust, sulfur dioxide, carbon monoxide, nitrogen dioxide and oxide, ozone, as well as specific impurities and heavy metals. The results showed that the average annual concentrations of all pollutants under consideration did not exceed the maximum allowable concentrations, only in the atmospheric air of some cities was an excess of the average daily maximum allowable concentrations (MAC) observed. The atmospheric air pollution index (API) in cities was in the range of 1.1-4.94.
Colonic perforations are typically attributed to various medical and surgical causes, but rare instances arise from unconventional incidents. This case report presents an unusual occurrence of sigmoid colon perforation resulting from exposure to compressed air. A 45-year-old male, with no history of gastrointestinal disorders, presented with sudden onset abdominal pain and signs of peritonitis. Upon investigation, a history of accidental exposure to high-pressure compressed air while working was revealed. Subsequent imaging and exploratory laparotomy confirmed a perforation in the sigmoid colon. The patient underwent surgical repair and had an uneventful postoperative recovery. This report highlights the potential dangers associated with non-medical uses of compressed air and emphasizes the importance of a thorough patient history in diagnosing uncommon etiologies of gastrointestinal perforations.
This study investigates the variances in air quality between urban and industrial areas within Kuwait. Through comprehensive monitoring and analysis, we assess the concentration levels of pollutants, such as particulate matter, nitrogen oxides, and sulfur dioxide, in both settings. Factors contributing to air quality disparities are explored, including industrial emissions, vehicular traffic, and urban development. The findings shed light on the environmental challenges faced by different zones and provide insights for policymakers to implement targeted strategies for air quality improvement.
The authors of the work proposed a combined solar heating installation for heat and humidity treatment of supply air for greenhouses. The object of study is a combined solar collector for the simultaneous heating of water and air.
Heat and humidity treatment of supply air is an energy-intensive technological process that requires huge consumption of thermal energy and water resources.
In this work, in order to reduce the consumption of traditional energy for heat treatment of supply air, a combined solar collector is proposed and the results of an experimental study of the operating modes of the installation in the conditions of Karshi are presented. As a result of experimental studies, the high energy efficiency of a combined solar collector in the “water + air” heating mode has been shown. It has been established that the efficiency of the installation is in the range of 0.57-0.80.
One of the greatest challenges facing humanity today is the protection of the environment and human health. Atmospheric air is a factor in the environment. Inadequate or inefficient use of gas purification devices, rapid development of production, transport, energy and agricultural industrialization, as well as the lack of compliance with agricultural and hygienic regulations in the use of pesticides in agriculture, lead to pollution of the environment, which leads to living in areas with polluted air can negatively affect the health of the population. That is why air pollution and public health issues are becoming increasingly important.
This study presents the design and development of an innovative Air Conditioner Control System based on Fuzzy Logic. The use of Fuzzy Logic allows for intelligent and adaptive control, optimizing the performance of air conditioning units. By incorporating Fuzzy Logic algorithms, this system efficiently adjusts cooling and heating operations based on real-time environmental conditions and user preferences. The research highlights the application of Fuzzy Logic in enhancing energy efficiency, comfort, and adaptability in air conditioning systems, ultimately contributing to sustainable and intelligent HVAC solutions.
This research paper discusses the provision of energy efficiency for air permeability of interfloor ceilings in the sections of nodal connections. Resistance to air permeability is the possibility of using the proposed method of device thermal liners, which accordingly increase the durability of the building.
It is shown the results of the investigation on the new methods of noninvasing diagnosing of Ischemic Heart disease in this paper. This method is based on analyzes of expirating air. The results of investigation showed the possibility of the surface ionizating detector in diagnosis of Ischemic Heart disease. It was revealed the statisticly importance of difference in containing the amines in expirating air of patients ill w ith Ischemic Heart disease and healthy people. The advantage of this method concludes whole harmless, expressive ness and canceling the operative intervention and possibilities of mass testing, and cheap price of observation. The difference in eliminating the amines with expirating air can be stable marker for early diagnosing of the preinfarctive state
It is known that the impact of global climate change on human health is primarily due to an increase in the content of pollutants and allergens in the atmosphere as a result of rising air temperatures, which increases the risk of heart disease, circulatory system diseases and airborne diseases. increase. Diseases and excess dust in the air lead to an increase in the incidence of allergies and bronchial asthma. Especially in recent years, information related to the deterioration of the environmental situation in cities has often appeared. Improving the well being of the population in the regions can be achieved through the sustainable development of cities and solving their environmental problems.
The paper considers as hubs for the transportation of products and individuals, as well as the advanced boondocks of a country, air terminals don't just assume a significant monetary part in present day culture, yet additionally enhance a local area's social and social attachment and variety. Concerning their effect on the regular and anthropological climate, they address a very energy-concentrated type of transport, which can force tremendous changes to the laid out connections and order. Worked to have an assortment of purposes and serve different clients' gatherings, enormous air terminal terminals advanced from open fields, to retail plazas, to metropolitan mixtures, having a functional size typically equivalent to that of a cutting edge city, yet of a disputable quality and with no particular region or populace. Security guidelines and market overviews have up until this point administered their plan, prompting the reception of a nonexclusive advancement design that further disengages them from the encompassing area, no matter what its improved availability.
This article analyzes existing methods for determining the level of air pollution from waste gases in various sections of urban streets, as well as the availability of measuring instruments.
Using Aspen Plus software to separate free-flowing solids from gas or air, the dedicated
cyclone is widely used to separate various vapors and solids from hot air after KCl drying, reducing
industrial scale air pollution, recovering valuable products or negatively affecting the process.
development of a computer model that ensures the exclusion of degreasing substances that are harmful and capable of harming devices.
the maxillary sinus varieties are basic among populaces. These varieties may connect with provocative sicknesses like sinusitis or different illnesses (unfavorably susceptible rhino-sinusitis and bronchial asthma). Aim: The point of this examination was to explore maxillary sinus varieties by utilizing CT pictures in grown-up Sudanese populace. Methods: This was observational illustrative cross sectional investigation directed in Khartoum state-Sudan from June to Dec 2014. The examination was done in 30 volunteers. All members went through head CT filters and sagittal and coronal cuts were acquired. Members were solid people without history of head or face injury or sinus activity history. Results: Mucosal thickening was the most predominant anomaly (66.7%), trailed by antral septa (23.3%), destroyed sinus (16.6%) and mucosal polyp (3.3%). No huge contrasts were found among guys and females with respect to the maxillary sinus physical discrepancy.Conclusion: varieties of maxillary sinus accentuate how significant it is for the dentomaxillofacial radiologist, otolaryngologists, radiologist and anatomists to know about the physical varieties of the maxillary sinuses. Physical varieties of maxillary air sinuses are normal and might be an inclining factor for sinus and upper respiratory lot illnesses. Investigations of these varieties and discrepancy from the norm were done in numerous nations worldwide however no examinations were done among Sudanese. This examination speaks to an information base about maxillary sinus in Sudan. Further examinations are required including enormous example number for more assessment and investigation.
Хозирги даврда саноат ишлаб чикариш. электр энергияси, моторли транспорт воситаларидан фойдаланишни тез ривожланиб бориши окибатида атмосфера кавосини мухофаза килиш муаммолари уткир тус олиб бормокда. Бу омиллар атмосфера хавосини ифлосланиши долзарб муоммоларини аниклайди. Антропоген ифлосланишлар асосан саноат корхоналари, авто ва хаво транспортлари, тсмир йул, сув транспорта чикиндиларининг атмосфера хавосига тушиши натижасида вужудга келади. Атмосфера хавосини эколого-гигиеник бахолаш натижалари асосида ахоли саломатлигини саклаш ва мустахкамлашга йуналтирилган профилактик чора-тадбирлар ишлаб чикилган. Туман атмосфера хавосининг тозалик даражаси ва ундаги ифлослантирувчи маънбаларга умумий характеристика берилган. Охирги 3 йил мобайнидаги атмосфера хавосининг сифатини кимёвий курсаткичларннн СЭОМ маълумотларига кура тахлил килинган. Туман ахолисининг умумий ва энг куп таркалган касалликларининг атмосфера хавосининг холатига корреляцией богликлигини аникланган.
Монография тиббий профилактика ва жамоат саломатлиги йуналишидаги ОТМ талабалари, укитувчилари ва СЭОМ ходимлари учун маълумот сифатида такдим этил ди.
The article highlights the environmental education of Primary School students on the basis of an integrated approach,their contribution to the comprehensive formation of environmental etiquette, the Prevention of pollution of water, soil, air, the preservation of the colorfulness of plants and animals, the negative consequences of the actions committed to nature.
From the analysis of the literature, it is known that agricultural pest control devices designed to combat insects or for fishing attract flying insects, the growth of functional systems of Fish and fish larvae in one norm plays an important role in the development of light rays of optical radiation sources. Instruments with incandescent lamp, fluorescent, halogen or light-emitting semiconductor optoelectronic irradiators are widely used as sources of optical radiation in this area. When creating agricultural devices from them, light-emitting semiconductor optoelectronic devices are considered to withstand competition with performance, energy efficiency and other physical characteristics. In connection with these, the research methods and results of the study on the distribution of semiconductor optoelectronic irradiators in the air and aqueous medium as well as the spectral characteristics are described in this work.
In this article, the feeling towards nature is interpreted through plein air in the visual art of Uzbekistan. Emphasis is placed on perception of existence and spiritual and moral education through visual art.
The article studies the design and principles of operation of wet dust collectors widely used in industry, analyzes their advantages and disadvantages, and also develops a new design of cone-mesh wet dust collectors. As a result of the theoretical studies carried out, equations were derived that calculate the total pressure lost during the transfer of dusty air into the device and the dispersion of liquid from the nozzle. Depending on the total pressure supplied to the device by dusty gases and liquids, it is possible to determine the efficiency of cleaning dusty air.