PRORAČUN OPTIMALNE POTROŠNJE PRIMARNE ENERGIJE ZGRADE

U ovom radu izvršena je energetsko – ekonomska analiza odvajanja stambene zgrade od gradske toplane i prijelaza na vlastitu kotlovnicu. U radu su analizirani prijedlozi za novi generator topline, te je analizirana i opcija postavljanja toplinske izolacije. Prije no što se moglo pristupiti analizi, potrebno je bilo odrediti godišnje potrebne korisne energije za grijanje i hlađenje, te pripremu potrošne tople vode. U tu svrhu korišten je računalni program KI Expert Plus. U obzir su uzeta bila tri generatora topline: kotao na plin, kotao na lož ulje i dizalica topline. Svi generatori topline bili su analizirani u kombinaciji s toplinskom izolacijom debljine od 0 cm do 15 cm. Cilj ovog rada bio je odrediti sustav koji će imati najniže troškove u periodu od 20 godina, za najnižu godišnju potrošnju primarne energije. Za svaki od tri predložena generatora topline proračunate su potrošnje godišnje primarne energije u odnosu na debljinu izolacije, te su izračunati ukupni investicijski troškovi i troškovi za pogon sustava u promatranom periodu. Temeljem dobivenih podataka odabran je optimalni sustav kao zamjena za postojeći spoj zgrade na gradsku toplanu.This thesis shows the energy - economy analysis of the separation of the residential building from the district heating and the transition to its own thermal system. This thesis analyzes the proposals for a new heat generator, and the option of installation of thermal insulation. Before the analysis could be accessed, it was necessary to determine the annual useful energy for heating and cooling, as well as for heating of domestic hot water. Software KI Expert Plus was used for this purpose. Three generators of heat were taken into account: a gas boiler, an oil boiler and a heat pump. All heat generators were analyzed in combination with thermal insulating from 0 cm to 15 cm thick. The goal of this paper was to determine the system that will have the lowest cost over a period of 20 years, for the lowest annual primary energy consumption. For each of the three proposed heat generators, the annual primary energy consumption was calculated in relation to the insulation thickness and the total investment costs and the cost of running the system is calculated. Based on the data obtained, the optimal system was chosen as a replacement for the district heating syste