COMPETITIVENESS ASSESSMENT OF THE SOLAR SYSTEM OF A HOTEL IN THE VORONEZH REGION

2021 ◽  
pp. 97-105
Author(s):  
Наталья Михайловна Попова ◽  
Дмитрий Михайлович Чудинов ◽  
Ольга Анатольевна Сотникова ◽  
Наталья Александровна Петрикеева
Keyword(s):  
Water Supply ◽  
Electric Energy ◽  
Payback Period ◽  
Hot Water ◽  
Solar Collectors ◽  
Efficient Operation ◽  
Cost Of Electricity ◽  
Voronezh Region ◽  
Hot Water Supply ◽  
The Cost

Вопрос энергообеспечения зданий и сооружений на территориях с малоразвитой инженерной инфраструктурой и децентрализованными системами частично может быть решен применением солнечных систем теплоснабжения (или горячего водоснабжения). Подобные системы - надежные, безопасные, простые и малозатратные в эксплуатации, сокращают потребление традиционных энергоресурсов и эмиссию вредных выбросов в атмосферу. Возможность массового внедрения гелиоустановок в основном сдерживается стоимостными показателями, определяющими срок окупаемости. Ежегодный рост цен на традиционное органическое топливо, возможность изготовления солнечных коллекторов собственными силами и средствами может повысить их привлекательность. В работе произведена оценка рентабельности солнечной системы горячего водоснабжения гостиницы, расположенной в селе Бабяково Воронежской области для двух временных периодов (2005 г. и 2021 г.) с учетом повышения стоимости на электроэнергию, являющуюся основным традиционным энергоресурсом. Солнечные коллекторы гелиосистемы производятся собственными силами и средствами. Внедрение гелиоустановки для нужд горячего водоснабжения в традиционную систему теплоснабжения гостиницы позволит сократить потребление электроэнергии на 44 %. В работе показано, что повышение цены на электроэнергию за период с 2005 г. по 2021 г. не компенсировало рост стоимости материалов на изготовление солнечных коллекторов. При этом срок окупаемости для 2005 г. составлял 6,0 лет, для 2021 г. - равен 13,1 годам. Эффективная эксплуатация соответствует периоду 6,9 лет. Установка относительно российских и зарубежных производителей по затратам занимает среднее положение. При стоимости электроэнергии на уровне европейского рынка (2021 г.) срок окупаемости составляет 1,4 года. The issue of energy supply of buildings and structures in areas with poorly developed engineering infrastructure and decentralized systems can be partially solved by the use of solar heat supply systems (or hot water supply). Such systems (reliable, safe, simple and low-cost in operation) reduce the consumption of traditional energy resources and the emission of harmful emissions into the atmosphere. The possibility of mass implementation of solar plants was largely constrained by cost indicators that determined the payback period. The annual rise in prices for traditional organic fuels, the ability to manufacture solar collectors with their own strength and means can increase their attractiveness. The work assessed the profitability of the solar hot water supply system of a hotel, located in the village of Babyakovo, Voronezh Region, for two time periods (2005 and 2021), taking into account the increase in the cost of electricity, which is the main traditional energy source. The solar collectors were produced in-house. The introduction of a solar plant for the needs of hot water supply in the traditional heating system of the hotel can reduce electric energy consumption by 44 %. The paper shows that the increase in the price of electricity for the period from 2005 to 2021 did not compensate for the increase in the cost of materials for the manufacture of solar collectors. At the same time, the payback period for 2005 was 6,0 years, for 2021 was equal to 13,1 years. Efficient operation of the plants covers a period of 6,9 years. The installation of Russian and foreign manufacturers in terms of costs occupies an average position. With the cost of electricity at the level of the European market (2021) the payback period is 1,4 years.

Architecture Design of Building Integrated Solar Collector

2014 ◽  
Vol 889-890 ◽  
pp. 1333-1336
Author(s):  
Yu Fu ◽  
Kai Chen ◽  
Fei Ying Fu ◽  
Xin Bin Wang
Keyword(s):  
Water Supply ◽  
Solar Collector ◽  
Residential Buildings ◽  
Radiation Energy ◽  
Hot Water ◽  
Space Heating ◽  
Solar Collectors ◽  
Domestic Hot Water ◽  
Heating And Cooling ◽  
Hot Water Supply

Solar thermal collector converts solar radiation energy into useful thermal energy and transfers to a transport fluid flowing through the system. The collected energy can be used either direct to space or water heating equipment, or to a thermal storage for later use. Along with fast development, not only domestic hot water supply is needed, but also space heating and cooling are required. Also, limited roof space is another key barrier that should be considered. Furthermore, most of the building integration with solar collectors are mounted on the roof top by flat or tilt angle at present. It is considered to be a failure of low level architectural quality because the collector is used only for application and seems as an independent technical element of the building. With the consideration of the above, novel type of solar collector has been proposed to realize the utilization and offset the barriers. This novel solar collectors is especially suitable to supply domestic hot water, and combines with ASHP for multi-function, space heating and cooling as well as domestic hot water supply. Additionally, it is well integrated with high-rise residential buildings, which is good for aesthetic.

scholarly journals ИНТЕГРАЦИЯ ПРОЦЕССА ТЕПЛООБМЕНА СОЛНЕЧНОЙ УСТАНОВКИ

2018 ◽  
Vol 82 (1) ◽  
Author(s):  
Юрий Анатольевич Селихов ◽  
Виктор Алексеевич Коцаренко
Keyword(s):  
Heat Flux ◽  
Water Supply ◽  
Flux Density ◽  
Thermal Energy ◽  
Solar Collector ◽  
Heat Flux Density ◽  
Hot Water ◽  
Polyethylene Film ◽  
Solar Collectors ◽  
Hot Water Supply

Европейские страны демонстрируют высокие возможности простого преоб­разования солнечной энергии в тепловую энергию, которая может успешно использо­ваться для обеспечения различного рода технологических, отопительных и бытовых потребностей. Кроме того, ввод в эксплуатацию сол­нечных установок улучшает экологическую ситуацию района потребления тепловой энер­гии за счет снижения объемов выбросов загряз­няющих веществ, к которым относятся продукты сгорания органического топлива, используемого для производства тепловой энергии. В настоящее время в южных районах Украины уже используются солнечные установки для горячего водоснабжения и отопления. Однако, внедрение новых энергетических и экономически выгодных установок идет медленными темпами, что объясняется довольно высокими стоимостными показате­лями, как отечественных, так и зарубежных установок. Таким образом, на наш взгляд, является актуальной концепция создания новых солнечных установок, наиболее привлекательных для потенциаль­ного потребителя. Реализация данной кон­цепции возможна при таком варианте исполнения солнечных установок, когда затраты на выработку тепловой энергии с помощью этих установок будут ниже уровня суммарных затрат на получение тепловой энергии традиционными способами (в частности, в котельных установках). Однов­ременно с этим, срок окупаемости солнечных установок должен быть соизмерим с гарантийным сроком их эксплуатации. Для выполнения поставленных условий представ­ляется целесообразным разработка таких конструкций солнечных коллекторов, которые позволяли бы минимизировать затраты на их изготовление, монтаж и обслуживание. Это может достигаться за счет использования дешёвых отечественных материалов, выпуск которых гарантирован в достаточных объемах на протяжении длительного срока. Разработка, изготовление и внедрение двухконтурных солнечных установок позволило круглогодично эксплуатировать солнечный коллектор, но капитальные и эксплуатационные затраты при этом были  на таком уровне, что для полной окупаемости солнечной установки могло понадобиться более пяти лет, так как солнечные коллектора изготавливались из металла.  В рамках сформулированной задачи нами был разработан и изготовлен солнечный коллектор из полиэтиленовой пленки. Предлагается двухконтурная солнечная установка для горячего водоснабжения и отопления, у которой солнечные коллектора изготовлены из полиэтиленовой пленки. Такая установка разработана, изготовлена и запущена в эксплуатацию в одном южном регионе Украины. На установке были получены экспериментальные результаты работы установки в разных режимах в течение года. После обработки этих данных были получены обобщающие зависимости: плотности теплового потока от температуры теплоносителя в коллекторе, времени работы установки в течение светового дня и расхода теплоносителя; коэффициента полезного действия от плотности теплового потока; максимального коэффициента полезного действия от максимальной плотности теплового потока; количества теплоты при конвекции от скорости натекания ветрового потока от 1 до 6 м/с на внешнюю поверхность солнечного коллектора. Зависимости получены при разных объемных расходах V от 0,5 до 3,0 м3/ч теплоносителя. Максимальная погрешность проведенных расчетов не превышает 5 %.  European countries demonstrate high opportunities for simple conversion of solar energy into thermal energy, which can be successfully used to provide various types of technological, heating and domestic needs. In addition, the commissioning of salt plants improves the ecological situation in the area of consumption of thermal energy by reducing emissions of polluting substances, which include combustion products of organic fuel used for the production of thermal energy.  At present, solar installations for hot water supply and heating are already used in the southern regions of Ukraine. However, the introduction of new energy and economically advantageous plants is proceeding slowly, which is explained by rather high cost indices, both domestic and foreign installations.Thus, in our opinion, the concept of creating new solar installations that are most attractive to a potential consumer is relevant. Implementation of this concept is possible with such an option of solar installations, when the cost of generating thermal energy using these facilities will be lower than the total cost of obtaining thermal energy by traditional methods (in particular, in boiler plants). However, with this, the payback period of solar installations should be commensurate with the warranty period of their operation. To fulfill the set conditions it is advisable to develop such designs of solar collectors that would allow to minimize the costs of their manufacture, installation and maintenance. This can be achieved through the use of cheap domestic materials, the release of which is guaranteed in sufficient quantities over a long period. The development, production and implementation of dual-circuit solar installations allowed the solar collector to be operated year-round, but the capital and operating costs were at such a level that it would take more than five years to fully pay for the solar installation, since the solar collectors were made of metal. Within the framework of the formulated task, we developed and manufactured a solar collector made of polyethylene film. A double-circuit solar installation is proposed for hot water supply and heating, in which the solar collectors are made of polyethylene film. Such an installation is designed, manufactured and commissioned in one southern region of Ukraine. Experimental results of the installation in different modes during the year were obtained at the plant. After processing of these data, generalizing dependencies were obtained: the heat flux density from the coolant temperature in the collector, the operating time of the installation during the daylight and the flow of the coolant; coefficient of efficiency from the density of heat flow; the maximum efficiency from the maximum heat flux density; the amount of heat in convection from the rate of leakage of the wind flow from 1 to 6 m / s on the outer surface of the solar collector. Dependencies were obtained at different volumetric flows V from 0.5 to 3.0 m3 / h of the heat carrier. The maximum error in the calculations does not exceed 5%.

scholarly journals A novel concept for energy-efficient floor heating systems with minimal hot water return temperatures

2021 ◽  
Vol 2069 (1) ◽  
pp. 012106
Author(s):  
Kevin Michael Smith ◽  
Nan Hu ◽  
Dorte Skaarup Østergaard ◽  
Svend Svendsen
Keyword(s):  
Water Supply ◽  
Energy Efficient ◽  
Preliminary Investigation ◽  
Self Regulation ◽  
Heat Pumps ◽  
Hot Water ◽  
Efficient Operation ◽  
Heating Systems ◽  
Hot Water Supply ◽  
Floor Heating

Abstract The study proposed and investigated a new concept for hydronic floor heating in dwellings with the aim of reducing hot water temperatures toward a more robust and energy efficient operation. Modern heating systems often rely on low return temperatures to improve operation efficiencies through reduced heat losses from return pipes, greater utilisation of condensation heat from boiler flue gases or from the increased COP of heat pumps. Our study investigated the potential of using an apartment heating substation (or ‘flat station’) to supply space heating through two mixing loops using hot water supply temperatures of 30°C to bathrooms and 24°C to all non-bathrooms. The concept sought to minimise hot water supply temperatures to utilise a self-regulating effect while ensuring low return temperatures. In the first iteration of the concept, the high-temperature return water from the bathrooms was cascaded to the non-bathrooms to heat these rooms and provide further cooling of the hot water. The calculated energy-weighted return temperature under this original concept was 25.6 °C for the example case of a new energy-efficient apartment building. However, there was limited potential to utilise the cascaded coupling, so considering the complexity of its configuration and controls, the authors simplified the proposed concept to two mixing loops without a cascaded coupling. The calculated return temperature with the updated concept was 25.7 °C. The control of the floor heating included some aspect of self-regulation because the heat transfer strongly depended on the indoor temperature. Based on the results of this preliminary investigation, the concept may provide a robust and energy-efficient option for configuring floor-heating systems in situations that rely on low hot-water return temperatures.

scholarly journals Performance evaluation of different solar collectors in building cooling, heating, and hot water supply

2020 ◽  
Vol 12 (4) ◽  
pp. 043701
Author(s):  
Junbao Xia ◽  
Yi Li ◽  
Chunmei Li ◽  
Yi Wang ◽  
Lidong Xie ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Water Supply ◽  
Hot Water ◽  
Solar Collectors ◽  
Hot Water Supply ◽  
Building Cooling

scholarly journals ENERGY EFFICIENCY OF COMBINED HEAT SUPPLY SYSTEMS

2021 ◽  
Vol 2 (39) ◽  
pp. 92-97
Author(s):  
R. Klimov ◽  
A. Morozovskaya
Keyword(s):  
Water Supply ◽  
Heat Supply ◽  
Fossil Fuel ◽  
Heat Supply System ◽  
Heat Pumps ◽  
Supply System ◽  
Hot Water ◽  
Solar Collectors ◽  
Hot Water Supply ◽  
Supply Systems

The consumption of energy resources in the world states is constantly growing from year to year. The production of fossil fuels is also increasing, but for various reasons it cannot fully cover the required amount from consumers. One of the most important consumption sectors is heat loads from heating, ventilation and hot water supply of industrial and residential buildings. To cover the thermal loads of heating and hot water supply, the necessary heat carrier is water heated to a certain temperature. The most promising from the point of view of heating water for hot water supply are solar collectors. Hot water for heating needs to be reheated practically throughout the entire heating period. The introduction of heat pumps is promising. When using solar collectors, the heating agent can be reheated in heat pumps. The aim of the study is to develop such a combined heat supply system that uses more renewable energy and as a peak source a fossil fuel boiler (electric energy), as well as a method for calculating this system to determine the optimal composition of equipment and rational modes of its operation. The methodology for calculating heat supply systems combining solar collectors, heat pumps and fossil fuel boilers is presented. The problem of load distribution between the main elements of the combined heat supply system should take into account the probabilistic component. This is due to the fact that with a changing real mode of operation, different thermal load of the equipment can be optimal. This is primarily influenced by the variable heat inputs from solar collectors during the day. According to the above method, it is possible to determine the optimal parameters of the heat supply system for different operating modes, at which the minimum consumption of fossil fuel will be ensured.

scholarly journals MATHEMATICAL MODEL OF HEAT SUPPLY INSTALLATION AS AN OBJECT OF ECONOMIC EFFICIENCY AND AUTOMATION

2020 ◽  
Vol 2 (2) ◽  
pp. 69-74
Author(s):  
S. HORIASHCHENKO ◽  
◽  
Yu. KRAVCHIK ◽  
O. PIDGORNYI ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
Solar Radiation ◽  
Solar Energy ◽  
Water Supply ◽  
Solar Collector ◽  
Heat Supply ◽  
Hot Water ◽  
Energy Sources ◽  
Solar Collectors ◽  
Efficient Operation

Solar energy is widely used in cases where the inaccessibility of other energy sources in combination with a sufficient amount of solar radiation justifies it economically. With the help of a system of solar collectors, you can significantly reduce energy costs for hot water supply and heating. In addition, the use of this system helps reduce CO2 emissions. The potential of solar energy in Ukraine is quite high. According to the climatic conditions of our region, solar activity is slightly lower than in the southern regions, so the use of flat solar collectors, which use both direct and scattered solar radiation, is effective for our region. The use of heat collectors in the home for water supply and heating of small areas is economically feasible, as it does not require significant costs. Heat supply plants using non-traditional energy sources are promising in terms of fuel savings and reduction of harmful effects on the environment. To increase the service life, economical use of heat and fuel, efficient operation of the installation requires the use of automation. The article considers the development of a mathematical model of a heat supply installation based on a solar collector. For automated control of the heat supply installation, it is necessary to know the properties of this installation as a whole and its individual elements. For this purpose, models of individual elements of the heat supply installation in a linear approximation are considered. The solar collector is conditionally divided into two parts. The model of the ground heat exchanger is developed. Also e battery models and consumer premises. The given matrices of elements of installation of heat supply are united in the uniform system of matrices. The obtained results allow estimating in advance efficiency of their use and economic attractiveness.

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