Odziv hladilnega sistema na propustnost filtra nesnage

Marković, Mihael (author), Stritih, Uroš (mentor)

V tem diplomskem delu bomo poskušali dokazati vpliv akumulacije nesnage v filtru nesnage kasetnega konvektorja, s katerim smo simulirali hlajenje kotnega prostora v stavbi v poletnem času. Za dokazovanje zastavljene hipoteze smo izvedli tri nize meritev. Pri prvem smo odstranili filter nesnage in tako hlajenemu mediju – zraku omogočili prost pretok čez kasetni konvektor. V drugem primeru smo filter nesnage mehansko priprli za 3/5 in tako simulirali akumulacijo nesnage v filtru kovektorja. Tretji primer pa je s temeljito očiščenim ter pravilno nameščenim filtrom nesnage. Pri vseh treh nizih meritev smo merili enake parametre in sicer: temperatura hladilnega medija na vstopu v konvektor, temperatura hladilnega medija na izstopu iz konvektorja, temperatura hlajenega medija oziroma zraka na vstopu v konvektor, temperatura hlajenega zraka na izstopu iz konvektorja ter pa volumski pretok hladilne vode čez konvektor. Iz izmerjenih podatkov smo nato izračunali količine kot so masni tok hladilne vode, temperaturne razlike hladilne vode med vstopom in izstopom iz konvektorja, masni tok hlajenega zraka, toplotni tok pri prenosu toplote ter pa količino toplotne energije odvedene iz hlajenega zraka. Prišli smo do ugotovitve, da je izmenjava toplote največja, ko na konvektorju ni nameščenega filtra in najnižja, ko je filter poln nesnage.

• Language: Slovenian
• Keywords: konvektor, temperaturna razlika, masni pretok, volumski pretok, prenos toplote
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2024
• PID: 20.500.12556/RUL-160356
• Publication date in RUL: 27.08.2024

Secondary language

• Language: English
• Title: Cooling system response to debris filter troughput

Abstract

In this thesis we proved the influence of debris accumulation in the filter of a fancoil, which we used to simulate the cooling of a corner room of a building during summer. To prove our hypothesis, we have carried out three sets of measurements. In the first measurement there was no debris filter on the cassette type fancoil. In the second case, we closed the filter by 3/5 to simulate debris. The third example is with a clean debris filter. We were always measuring the same parameters: temperature of the water at the inlet and outlet to the fancoil, air temperature at the inlet and outlet of the fancoil and the volume flow of water through the fancoil. From the measured data we calculated the mass flow of cooling water, the temperature differences of the cooling water between the inlet and the outlet, the mass flow of the air, the heat transfer, heat flux and the amount of heat energy removed from the air. We found out that the heat transfer is at its highest point when there is no filter in the fan-coil and at it's lowest when the filter is full of debris.

• Keywords: fancoil, temperature difference, mass flow, volume flow, heat transfer