RT Journal Article
T1 Experimental performance analysis of a packaged R290 refrigeration unit retrofitted with R170 for ultra-low temperature freezing
T2 Analyse expérimentale des performances d'un groupe frigorifique monobloc au R290 converti au R170 pour la congélation à très basse température
A1 Rodríguez-Criado, Juan Carlos
A1 Expósito-Carrillo, José Antonio
A1 Peris-Pérez, Bernardo
A1 Domínguez-Muñoz, Fernando
K1 Ingeniería térmica
K1 Criogenia
K1 Hidrocarburos
AB While the global refrigeration capacity installed in ultra-low temperature applications is considerably lower than in standard refrigeration, the interest in such systems has risen during the last months due to their emerging demand for the preservation of mRNA vaccines. Several theoretical studies can be found in the literature for ultra-low temperature applications. However, there is still a lack of reliable experimental data that may be used for the models validation and, thereby, to perform more rigorous investigations. In light of this, the present manuscript proposes an ultra-low temperature refrigeration unit based on an indirect cascade system, developed by retrofitting a standard low-temperature R290 packaged unit. In this investigation, firstly, the suitability of the original components is assessed and, then, the unit is experimentally tested within a wide range of operating conditions. Thereby, the system’s reliability is evaluated by assessing different parameters, such as discharge, condensing and evaporating temperatures and performance ratios. The main results showed a successful behaviour at the operating conditions tested, exhibiting a COP that ranged from 0.6 to 1.6 for cold room temperatures between -80 ºC and -65 ºC, respectively.
PB Elsevier
YR 2021
FD 2021-11-24
LK https://hdl.handle.net/10630/39739
UL https://hdl.handle.net/10630/39739
LA eng
NO International Journal of Refrigeration 134 (2022) 105–114
NO https://openpolicyfinder.jisc.ac.uk/id/publication/12611
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026