Microclimate support systems in the hotel complex "Helios" in Dmitrivka, Mykolaіiv region
Students Name: Hereha Mykhailo Tarasovych
Qualification Level: magister
Speciality: Heat and Gas Supply and Ventilation
Institute: Institute of Civil Engineering and Building Systems
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Hereha M.T., Yurkevych Y.S. (supervisor). Microclimate support systems in the hotel complex "Helios" in Dmitrivka, Mykolaіiv region. Master’s thesis. - Lviv Polytechnic National University, Lviv, 2020. Extended abstract. The heat supply of the building is carried out from the boiler room. The heat carrier - water with parameters of 90 - 70 ° C. The heating is provided centrally, double-circuit. The first circuit is two-pipe fan coils for administrative premises, the second circuit is two-tube fan coils from Mc-Quay for hotel rooms. [5] The heating is carried out at the expense of a two-pipe system of fan coils, which in the "summer" mode work as air conditioners, and in the "winter" mode compensate for heat loss. Estimated temperature difference - 70-50 = 20 ° C. The first circuit is two-pipe fan coils of Daikin, which serve administrative premises, the second circuit - two-pipe fan coils of Daikin, which serve hotel rooms. The electric bath towels are a source of heat in the bathrooms. The hot water supply system was designed with using solar energy. [7] The premises of the facility are air-conditioned with two-tube Daikin fan coils. Fan coils serve as closers. By means of inflow air ducts the sanitary norm of the prepared air moves in a premise). The source of cooling supply for fan coils and supply units are two refrigeration machines - chillers from Daikin with a total capacity of 260 kW. Chiller №1 - with a cooling capacity of 120 kW; chiller №2 - with a cooling capacity of 140 kW. Chillers are installed on the technical floor in the open area. Between the refrigeration machines and the fan coil system there is a hydraulic module - control unit HP1, which includes: - water-water heat exchanger with a capacity of 260 kW. A 30% solution of ethylene glycol, temperature of the coolant 7-12 0С, circulates through the pipelines between the chillers and the heat exchanger, to prevent thawing of the system in the cold period of the year. Water with parameters 9-14 0С circulates between the HP1 node and the fan coil system. - two circulating pumps, one of which is working, the other - backup. Every week the pumps switch from operating-standby modes. - in the hydraulic module there is an automatic switching of modes "winter" - "summer". The ventilation system - supply and exhaust system with heat recovery, which is used to supply rooms with clean air and remove contaminated air from the room. With mechanical ventilation, air exchange is carried out due to the air pressure created by the fans. Supply and exhaust air ducts of general exchange ventilation are insulated with self-adhesive thermal insulation type "Pinofol" 8 mm thick. The scientific part of the work reveals the issue of increasing the efficiency of the solar system by rational choice of the type of absorber for the solar collector. An absorber is a device which is used to convert solar energy into thermal energy. The next stage is the transfer from the surface of the solar panel to the carrier. Absorbers are made of various configurations, and the material is copper or glass, rarely aluminum. Most often they are made in the form of thin metal plates which connect to the heat exchanger. The absorber could be the heat exchanger itself, in addition, made of copper, but it gets very little sunlight. And the adsorber made in the form of plates completely covers the heat exchanger, thereby increasing the area of solar influence and efficiency of all installation. The device is installed in the sunlight area of the equipment. This coating not only provides greater absorption, but also prevents back radiation. The efficiency of the solar collector depends primarily on the absorber and the glass insulation of the housing. The absorption of solar radiation depends on the collector cover, which should be as much as possible, regardless of the angle of the sun. Thermal insulation of the case is directly dependent on heat loss to the environment, therefore, also affects the thermal efficiency of the solar collector The absorber is called nothing more than the "heart" of the collector, the element responsible for the absorption of solar radiation, heat production and transfer. Study object - hotel complex "Helios" in Dmitrivka, Mykolaіiv region Scope ofresearch - microclimate support systems, the absorber of the solar collector Goal of research - the design of systems to ensure the microclimate of the hotel. Heating, hot water supply, ventilation and air conditioning systems have been designed, as well as a boiler house. It is determined which absorber to choose when selecting a solar collector. It is determined that the absorber of the solar collector should be taken into account when choosing, as one of the main factors determining the efficiency of the solar collector, as well as the responsibility for the behavior of invariant parameters during the life of the collector. Key words - heating devices, heat carrier, heat source, throttle-valve, refrigerant, air conditioner, solar system, absorber, limit of fire resistance, energy-saving technologies. References. 1. DBN B.2.6-31: 2016 "Thermal insulation of buildings" - K .: Ministry of Construction of Ukraine, 2016. 2. DSTU-N B V. 1.1-27: 2010 “Building climatology” - K .: Ministry of Construction of Ukraine, 2010. 3. DSTU B B.2.6-189: 2013 Methods of selection of thermal insulation material for building insulation 4. DBN B.2.5-67: 2013 “Heating, ventilation and air conditioning” - K .: Ministry of Construction of Ukraine, 2013 ;. 5. DBN B.2.2 20: 2008 Hotels. - Kyiv: Ministry of Construction of Ukraine, 2008 6. O. 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