The present study of a freezing system has developed based on an air conditioning system, whose purpose is to take advantage of the technological transfer of cold producing equipment for food storage and conservation uses. The installed capacity of 9000 BTU/Hr was considered for the choice of equipment. We studied the freezing process of fish, water, and the preservation of legumes with a volume of 1 kg per product individually. The freezing temperature has evaluated with a mechanical compression refrigeration system of Gas R22 with temperature interactions of 29.6 ° C to -12 ° C. and monitored with a Proportional Integrative Derivative (PID) controller. For production cost, the equipment was mostly made of its parts and pieces with recycling material. A descriptive experimental design has carried out, for the verification of results. The equipment managed to reach chamber temperatures of -13 ° C from 20 minutes once the equipment (compressor) has turned on under specific product descriptions.

The design and construction of a cold production system from the ice water submitted by a mechanical direct expansion system contributing to the development of knowledge in the area of air conditioning were carried out. Among the technical design parameters, a direct expansion system with cooling capacity of 9000 BTU/Hrs, R134 refrigerant gas to a turbine for the work of the Fan Coil of ½ Hp of force 220 V was selected, as was the fan motor of the cooling tower as fundamental means for heat transfer. The recirculation pumping system is carried out by pumps of 0.37 kW of power and a maximum flow of 40 l/min. For both the evaporator sump (cold) and the condenser sump (hot). The work stage is given in two independent circuits, the Fan Coil system is connected to the evaporator sump and the cooling tower, in turn, is connected to the condensation system for proper operation and achieve condensation temperatures of 35 ° C and in case of having water requirements in the cold sump, the tower is connected by means of an electromagnetic valve for its supply.

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No abstract

One of the problems encountered today is the inefficiency of refrigeration systems and electrical equipment. The present study proposes the manufacture of a refrigeration chamber that responds to a great variety of needs both in industrial processes, medicine, and domestic service, becoming an indispensable process within the socio-productive sector. The proposed system has an investigative scope, as a contribution to the agricultural food sector for the derivation of variables and the behavior of products (plants-food) and its method of conservation for quality towards the consumer. The type of investigation responds to the experimentation supported by an observation card with variable rate testing tests. Given the aforementioned, a freezing and refrigeration system is elaborated, taking advantage and optimizing an air conditioning system that works up to 24°C in the room and under the modification obtain temperatures of -15°C, starting from an average temperature of 29°C and a 65% relative humidity of the outside.