Energy and Economic Analysis of an R744 Cooling System as a Replacement for an R404A System

• Autorzy: Kozłowski Cezary , Ruciński Adam
• Języki publikacji: EN

Abstrakty

EN

High consumption of energy in HVACR industry need to be reduced according to intense fossil fuels usage. It is dangerous for our climate and then for our health and life quality of next generations. The main aim of the study is to compare two cooling systems with the same cooling capacity but with different working refrigerant. One of them is R404A (fluorinated gas) and another is R744 (carbon dioxide). The question is, which of the systems uses lower amount of energy and which of them has lower LCC. The ‘carbon path’ – CO2 emmision is considered too. In the paper the configuration of the systems were established. The cycle with R404A is straight one stage compressor refrigeration system compare to supercritical compression refrigeration system with R744. The calculation process was done in Pack Calculation Pro software. It gives some databases with climate data which helps to find exploitation energy usage and energy cost with ‘carbon path’ calculations. For a system based on the use of R744 refrigerant, electricity consumption is lower than when using R404A refrigerant. Particularly large savings are generated in winter. Annual savings can be estimated at 28%. This is due to the difference in average annual EER of 1.15. Then, calculation introduced that total emission for the system with R404A is nearly 32% higher than in case of R744 supercritical compression system. The comparison done in this paper shows that supercritical compression systems with R744 is good alternative technology for those with fluorinated gases. However, some technical problems should be improved to make this technology much more efficient, cheaper and safe.

Słowa kluczowe

EN

energy efficiency; refrigerant; f-gases

PL

efektywność energetyczna; czynnik chłodniczy; f-gaz

• Wydawca: Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
• Czasopismo: Modern Engineering
• Rocznik: 2022
• Tom: 3
• Strony: 18--26
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Kozłowski Cezary

• Warsaw University of Technology, Faculty of Power and Aeronautical Engineering, Institute of Heat Engineering, Warsaw, Poland

autor

Ruciński Adam

• Warsaw University of Technology, Faculty of Power and Aeronautical Engineering, Institute of Heat Engineering, Warsaw, Poland

• https://orcid.org/0000-0001-6545-9865

Bibliografia

• 1. Synthesis report on the evaluation of national notifications related to Article 14 of the Energy Efficiency Directive, Joint Research Centre, 2018
• 2. District Heating and Cooling country by country, Euroheat and Power, Survey 2013
• 3. 2019 rok we Francji pod znakiem spadku zużycia i produkcji energii elektrycznej, CIRE.pl
• 4. Bitzer 2011 Catalogue of semi-hermetic compressors, Bitzer, 2012
• 5. Oficjalna strona internetowa marki Dorin®: dorin.com [dostęp: 6.02.2023]
• 6. Thermodynamic Analysis of a CO2 Refrigeration Cycle with Integrated Mechanical Subcooling. Nebot-Andrés, Laura, et al, Energies, 2019
• 7. Eckert, Michael; Kauffeld, Michael; Siegismund, Natural Refrigerants: Applications and Practical Guidelines, VDE, 2021

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).