Design of heating and cooling system for residential building

U ovom radu projektiran je sustav grijanja, hlađenja i pripreme potrošne tople vode stambene zgrade na području grada Zagreba. Zgrada se sastoji od 3 etaže, prizemlja u kojem se nalazi strojarnica te prvog i drugog kata s ukupno 7 stanova koji su odvojeni negrijanim stubištem. Projektni toplinski gubici za zimsko razdoblje su izračunati prema normi HRN EN 12831 te iznose 29606 W. Sustav grijanja predviđen je pomoću dizalice topline zrak-voda učina 27,7 kW pri vanjskoj temperaturi -12°C i temperaturnom režimu 35/30°C i hlađenja učina 48,4 kW pri temperaturnom režim 16/19°C i vanjskoj temperaturi 35°C. U stanovima je predviđeno podno i zidno grijanje s temperaturnim režimom tople vode 35/30°C i podno i zidno hlađenje s temperaturnim režimom hladne vode 16/19°C, dok je u kupaonicama predviđena dodatna instalacija kupaonskih ljestvi. Priprema potrošne tople vode izvedena je pomoću akumulacijskog bivalentnog spremnika zapremnine 1000 l u kojem se potrošna topla voda zagrijava pomoću 12 solarnih kolektora orijentiranih prema jugu pod nagibom od 30° i dizalicom topline zrak-voda. Za projektirani sustav provedena je i tehno-ekonomska analiza rada sustava. Uz rad su priloženi i crteži u kojima je definiran raspored opreme po etažama te funkcionalna shema spajanja sustava i automatske regulacije.As part of this thesis a heating, cooling and domestic hot water system was designed for the residential building in the city of Zagreb territory. Building consists of 3 floors, a ground floor where is the machinery and two more storeys with grand total of 7 apartments. Total projected heat losses during winter period, calculated according to the HRN EN 12831 standard, are 29606 W. Heating system is designed via air-water heat pump of 27,7 kW capacity for the temperature of cold outside air of -12°C and temperature regime of hot water 35/30°C and cooling capacity of 48,4 kW for the temperature of the outside air of 35°C and cooling regime of cold water 16/19°C. Floor and wall heating is choosed with heating regime 35/30°C and floor and wall cooling with cooling regime of cold water 16/19°C, while furthermore for bathrooms will be installed hot water ladder radiators. Domestic hot water preparation consists of bivalent storage tank of 1000 l capacity where water is heated using 12 sollar collectors orientated south at the 30°C angle and air-water heat pump. For designed system techno-economic analysis was of working period was calculated. Along with this work, technical documentation which defines equipment disposition over the floors and the functional scheme of the system and automatic regulation system is submitted