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.
A feasibility analysis of replacing the standard ammonia refrigeration device with the cascade NH3/CO2 refrigeration device in the food industry
