20.500.12556/RUL-149005 Analiza prezračevalnega sistema z rekuperatorjem na osnovi prvega in drugega zakona termodinamike ter primarne energije Analysis of a ventilation system with a heat recovery system based on the first and second law of thermodynamics and primary energy V novodobnem času stremimo k čim učinkovitejši rabi energije. Slednje velja tudi za rabo energije, potrebne za vzdrževanje primernega bivalnega okolja v stavbah. V ta namen se uporabljajo prezračevalni sistemi z rekuperatorji, ki lahko toploto iz toka odvedenega zraka, ki zapušča stavbo, prenesejo na tok svežega dovedenega zraka, ki v stavbo vstopa. Na osnovi prvega in drugega zakona termodinamike ter faktorja pretvorbe primarne energije lahko izračunamo učinkovitost prezračevalnega sistema z rekuperatorjem ter tako pripomoremo k učinkoviti in skrbni rabi energije. Rezultate primerjamo na različnih energijskih bilančnih lupinah stavbe. Ugotovimo, da je izračunana učinkovitost rekuperatorja in celotnega prezračevalnega sistema odvisna od tega, ali pri izračunu upoštevamo prvi ali drugi zakon termodinamike. Dokažemo, da se učinkovitost rekuperatorja in prezračevalnega sistema povečuje z naraščanjem masnega toka skozi prezračevalni sistem. Količina primarne energije, potrebne za delovanje prezračevalnega sistema, je v primeru rabe fosilnih goriv večja, kot če za proizvodnjo električne energije uporabljamo obnovljive vire energije. In modern era, we strive to achieve the most efficient use of energy, which also applies to the energy required to maintain a suitable living environment in buildings. In order to achieve this, ventilation systems with heat exchangers are used. These exchangers are meant to transfer the heat from the outgoing air that is leaving the building to the fresh incoming air that is entering the building. It is possible to calculate the efficiency of the ventilation system with a heat exchanger using the first or second law of thermodynamics and the primary energy conversion factor. The calculated results are compared using different energy balance shells of the building. We find that the calculated efficiency of the heat exchanger and the entire ventilation system depends on whether the first or the second law of thermodynamics is considered in the calculation. It is demonstrated that the increase of the mass flow rate through the ventilation system increases the efficiency of the heat exchanger and ventilation system. When using fossil fuels instead of renewable energy sources, the amount of primary energy required to operate the ventilation system is higher. prezračevalni sistemi rekuperatorji prvi zakon termodinamike drugi zakon termodinamike primarna energija učinkovitost ventilation systems recuperators the first law of thermodynamics the second law of thermodynamics primary energy efficiency true false false [R. Bele] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-09-02 08:33:10 2023-09-02 08:33:11 2023-10-24 09:29:43 0000-00-00 00:00:00 2023 0 Ljubljana 0 XX, 64 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 697.9:536.72/.73:620.97(043.2) 255661 166413059 29604.pdf 29604.pdf 1 2E1AFA18508CFAD175048F92D34222E0 fa8fdb4cbb1fb783a5ba2bfc8cb5e267a4b49cf8e68840b96cc7621058c67ea0 9520b47d-495a-11ee-af86-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=173387 Fakulteta za strojništvo 0 0 0