TY - JOUR
TI - A feasibility analysis of replacing the standard ammonia refrigeration device with the cascade NH3/CO2 refrigeration device in the food industry
AU - Jankovich Dennis
AU - Osman Krešimir
JN - Thermal Science
PY - 2015
VL - 19
IS - 5
SP - 1821
EP - 1833
PT - Article
AB - The thermodynamic analysis demonstrates the feasibility of replacing the  standard ammonia refrigeration device with the cascade NH3/CO2 refrigeration  device in the food industry. The main reason for replacement is to reduce the  total amount of ammonia in spaces like deep-freezing chambers, daily  chambers, working rooms and technical passageways. An ammonia-contaminated  area is hazardous to human health and the safety of food products. Therefore  the preferred reduced amount of ammonia is accumulated in the Central  Refrigeration Engine Room, where the cascade NH3/CO2 device is installed as  well. Furthermore, the analysis discusses and compares two left Carnot¢s  refrigeration cycles, one for the standard ammonia device and the other for  the cascade NH3/CO2 device. Both cycles are processes with two-stage  compression and two-stage throttling. The thermodynamic analysis demonstrates  that the selected refrigeration cycle is the most cost-effective process  because it provides the best numerical values for the total refrigeration  factor with respect to the observed refrigeration cycle. The chief analyzed  influential parameters of the cascade device are: total refrigeration load,  total reactive power, mean temperature of the heat exchanger, evaporating and  condensing temperature of the low-temperature part.