Heating and Cooling System Design for a Residential Building

Zadatak ovog završnog rada bila je izrada projekta sustava grijanja i hlađenja stambene zgrade. Projekt je rađen za objekt koji se nalazi u Opatiji , riječ je o obiteljskoj kući s prizemljem i dva kata, izgrađena 2008 godine. Osnovni cilj za projektirati sustav grijanja je bio odrediti toplinske gubitke svih prostorija zgrade koje zahtjevaju grijanje. Proračun toplinskih gubitaka se izvodio prema normi HRN EN 12831. Dobiveni ukupni rezultat gubitaka topline je sugerirao koji je kotao na drvene pelete zajedno sa svom popratnom opremom potrebno odabrati te također i spremnik sustava za pripremu potrošne tople vode. Sustav grijanja zgrade izveden je s već spomenutim kotlom i spremnik PTV-a te akumulacijskim spremnikom koji su spojeni na radijatorski krug centralnog grijanja. Toplinski učin i broj radijatora u pojedinim prostorijama određen je toplinskim gubicima u istim. Kod određivanja sustava hlađenja zaključeno je da je ono potrebno samo u potkrovlju zgrade radi najveće izloženosti tog dijela vanjskim utjecajima. Za potrebe određivanja sustava hlađnja vrši se proračun dobitaka topline prema normi VDI 2078. Na temelju ovog proračuna te također i površine same prostorije koju treba grijati se određuje sustav hlađenja. U projektu je za hlađenje odabran klima uređaj s vanjskom jedinicom. Projektom su također razrađeni i sustav cjevovodi odnosno dimenzioniranje čitavog cjevovoda za sustav grijanja zajedno sa svom potrebnom opremom.The task of this final work was to design a heating and cooling system for a residential building. The project was made for a building located in Opatija, it is a family house with a ground floor and two floors, built in 2008. The main goal to design a heating system was to determine the heat losses of all rooms of the building that require heating. The calculation of heat losses was performed according to the standard HRN EN 12831. The obtained total result of heat losses suggested which wood pellet boiler together with all the accompanying equipment should be selected and also the tank of the system for preparation of domestic hot water. The heating system of the building is made with the already mentioned boiler and DHW tank and storage tank which are connected to the radiator circuit of central heating. The heat output and number of radiators in individual rooms is determined by heat losses in them. When determining the cooling system, it was concluded that it is needed only in the attic of the building for the greatest exposure of that part to external influences. For the purposes of determining the cooling system, the calculation of heat gains is performed according to the VDI 2078 standard. Based on this calculation and also the area of the room to be heated, the cooling system is determined. In the project, an air conditioner with an outdoor unit was chosen for cooling. The project also elaborates the pipelines themselves, ie the sizing of the entire pipeline for the heating system together with all the necessary equipment