Microclimate support systems in the hotel "Duet" in Uzhhorod
Students Name: Datskiv Vasyl Volodymyrovych
Qualification Level: magister
Speciality: Heat and Gas Supply and Ventilation
Institute: Institute of Civil Engineering and Building Systems
Mode of Study: part
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Datskiv V.V., Sukholova I.Ye. (supervisor). Microclimate support systems in the hotel "Duet" in Uzhhorod. Master’s thesis. - Lviv Polytechnic National University, Lviv, 2020. Extended abstract. In this master’s thesis microclimate support systems in the hotel "Duet" in Uzhhorod are designed, the size of the building of which in the plan is 42.9 x 50 m. The building consists of 6 floors. On the ground floor there are administrative premises (offices), and on the 2nd-6th floors there are living rooms of the hotel. Enclosing structures of the building are designed with heat-protective properties that provide specific consumption of thermal energy consumed for heating, within the established standards. In this work, heating, hot water supply, ventilation and air conditioning systems are designed. The source of heat supply is a roof boiler room with heating modules MN 120eko company "Ukrinterm". Solar collectors have also been designed on the roof of the building to alternatively meet the needs of the hotel complex in hot water supply. The heating system of the building is horizontal two-pipe with upper wiring. As an alternative to water heating, air heating is also designed, which can simultaneously perform the functions of general exchange ventilation and central air conditioning. Mechanical ventilation is used where sufficient air exchange is required, namely in industrial premises, restaurant halls, cafe halls, kitchens, laundry and engine rooms, and the advantage of this type of installation is independence from external atmospheric conditions (temperature, humidity, wind and pressure). Ventilation of living rooms, bathrooms and toilets is carried out by means of vertical exhaust ducts. In the kitchens of the restaurant, natural ventilation by means of exhaust ducts is insufficient. Due to the release of large amounts of heat and moisture by kitchen units and appliances, there is a need for mechanical supply and exhaust ventilation. Ventilation grilles should be located above the sources of steam and heat. Above the main stove is installed a ventilation canopy, the purpose of which is to remove steam and heat generated during cooking. The scientific part of the work is devoted to the calculation of the economic efficiency of the introduction of frequency converters for pumping units of the hot water supply system. With the growth of the cost of electricity, the issue of energy saving in general and in the operation of pumping units in particular becomes more relevant. It is possible to increase the energy efficiency of pumping units by regulating the mode of their operation, because hot water supply systems for household consumers are characterized by uneven daily schedule of water consumption. The traditional way to regulate the supply of pumping units is throttling and changing the number of operating units. These control methods do not take into account the energy aspects of water transportation. Traditional regulation leads to increased network pressure, overconsumption of electricity, increased leakage and non-production costs of water, increased wear of equipment. The most effective way to regulate the mode of operation of pumping units is quantitative, ie, changing the supply using an adjustable electric drive. The development of converter technology has allowed more widespread use of frequency converters to create an adjustable electric drive in pumping units. In order to address the issue of implementing a frequency-controlled electric drive, it is necessary to calculate its efficiency, which is to reduce electricity consumption. Study object - hotel "Duet" in Uzhhorod Scope ofresearch - microclimate support systems, efficiency from use of frequency converters at work of pumps for work of system of hot water supply Goal of research - the design of systems to ensure the microclimate of the hotel. Determining the economic benefits of using frequency converters in the operation of pumps for the hotel’s hot water supply system. Calculations allow to make with a high degree of reliability the conclusion on expediency of application of frequency converters on concrete objects and to provide effective spending of the means allocated for the decision of problems of energy saving. Key words - heat source, pump, efficiency, hot water supply system, frequency converter, technical and economic calculation. References. 1. DBN B.2.6-31: 2016 "Thermal insulation of buildings" - K .: Ministry of Construction of Ukraine, 2016. 2. 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