20.500.12556/RUL-186792 Učinkovitost senzibilnega in latentnega prenosa toplote naprave za prezračevanje Sensible and latent heat transfer efficiency of a residential ventilation unit Raba energije v stavbah predstavlja velik delež skupne rabe energije, zato je energijska učinkovitost prezračevalnih sistemov ključnega pomena za zmanjšanje energijskih izgub in doseganje podnebnih ciljev. Diplomsko delo obravnava energetsko učinkovitost komercialne prezračevalne naprave z vračanjem toplote in vlage (rekuperacijo), opremljene z entalpijskim toplotnim izmenjevalnikom v realnih razmerah obratovanja. V eksperimentalnem delu so bile izvedene minutne meritve temperature, relativne vlažnosti in tlaka na štirih karakterističnih točkah prezračevalnega sistema (zunanji zrak, zrak iz prostora, dovodni zrak in odpadni zrak) pri štirih prezračevalnih stopnjah (54, 126, 180 in 234 m³/h). Na podlagi izmerjenih vrednosti so bile izračunane psihrometrične veličine ter senzibilna, latentna in skupna entalpijska učinkovitost naprave, skupaj z analizo merilne negotovosti. Rezultati so pokazali, da senzibilna učinkovitost pada z naraščajočim pretokom od 88 % pri najnižji do 80 % pri najvišji stopnji, latentna učinkovitost pa se giblje med 54 % in 70 %. Skupna entalpijska učinkovitost znaša med 76 % in 84 %. Merilna negotovost latentne učinkovitosti je bila zaradi majhnega vlažnostnega potenciala razmeroma velika. Izmerjene vrednosti senzibilne učinkovitosti so primerljive s podatki proizvajalca. Energy use in buildings represents a large share of total energy use; therefore, the energy efficiency of ventilation systems is of key importance for reducing energy losses and achieving climate targets. The thesis examines the energy efficiency of a commercial ventilation unit with heat and moisture recovery (recuperation), equipped with an enthalpy heat exchanger, under real operating conditions. In the experimental part, one-minute measurements of temperature, relative humidity and pressure were performed at four characteristic points of the ventilation system (outdoor air, extract air, supply air and exhaust air) at four ventilation levels (54, 126, 180 and 234 m³/h). Based on the measured values, psychrometric quantities were calculated, as well as the sensible, latent and total enthalpy efficiency of the unit, together with an analysis of measurement uncertainty. The results showed that the sensible efficiency decreases with increasing flow rate, from 88% at the lowest to 80% at the highest level, while the latent efficiency ranges between 54% and 70%. The total enthalpy efficiency amounts to between 76% and 84%. The measurement uncertainty of the latent efficiency was relatively high due to the small humidity potential. The measured values of sensible efficiency are comparable with the manufacturer's data. prezračevanje rekuperacija toplote in vlage entalpijski izmenjevalnik senzibilna učinkovitost latentna učinkovitost energijska učinkovitost stavb prenos toplote ventilation heat and moisture recovery enthalpy exchanger sensible efficiency latent efficiency energy efficiency of buildings heat transfer true false false [I. Premrl] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-05 08:32:41 2026-09-05 08:32:44 2026-09-07 10:15:22 0000-00-00 00:00:00 2026 0 Ljubljana 0 XXII, 65 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536.24:697.92:620.97(043.2) 289382 290167299 48936.pdf 48936.pdf 1 306D941E1EA80A78102E1359ACECAC5B 1d80e1dfdf9532582cbb89af697a03f2a2fd1300033e42fee5a38ecac7e3ca46 989fc46e-a8f3-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246163 Fakulteta za strojništvo 0 0 0