Unitec Refrigeration Services - Post-Harvest cooling technologies

By: Unitec Refrigeration Services  11-11-2011
Keywords: Cooling, Handling Equipment, Produce Handling

Our Services


The cold, hard facts are in reality, simple to grasp, and even easier to impliment, if they are fully understood and smoothly executed. And at Unitec this is exactly what we do.

We make it our priotity to know and understand the post-harvesting market requirements, so that we can offer the best advice and solutions to all our clients. It is not enough to just understand the technology side of the cooling process, it is imperative that we understand the scientific and business sides too.

Efficient vacuum cooling relies on the product's surface-to-mass ratio. The most commonly vacuum-cooled are lettuce of all kinds, spinach, watercress, endive, parsley, cabbage (all kinds), celery, broccoli, cauliflower, mushrooms and pilze, sweetcorn and fresh flowers.


To be recognised globally as the leading provider of innovative, quality produce handling equipment and be renowned for our commitment to excellent customer service. Engineering At Unitec our aim is simple, to deliver tailored post-harvest cooling solutions through a conceptual understanding of the cooling requirements, deliver the best solution built with the best equipment and technology available - standardly and to offer convenient after-sales services na dmaintenance of our supplied equipment to enable maximum up-time to all our clients, in and around the South African markets. Installation

For the past 20 years Wyma have helped customers maximise the value of their produce. Whether you are a grower, pack house operator, shipper or packer, we can assist you to…

  • gently receive produce from the field and feed it into your dry, wash, pre-pack or repack line
  • wash and polish or size and grade your produce
  • pack produce and prepare it for distribution to your customers

Maintenance & Support

At Unitec our aim is simple, to deliver you the best produce handling equipment available.

To this end we leave no stone unturned to ensure that our products meet your specific requirements, are simple to operate and easy to maintain.

Keywords: Cooling, Handling Equipment, Produce Handling, Produce Handling Equipment, Vacuum Cooling,

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Other products and services from Unitec Refrigeration Services


Unitec Refrigeration Services - Post-Harvest cooling technologies - services

In this stage, we create a comprehensive list of all the items and equipment needed, and who is responsible for doing what on the project - meaning client and Unitec. Common Produce Cooling Methods Room Cooling – Placing commodities in an insulated room equipped with refrigeration units to chill the air. Field heat should be removed from fresh fruits, vegetables, and flowers as quickly as possible after harvest.


Unitec Refrigeration Services - Post-Harvest cooling technologies - forced air

Warm water from the process is circulating in the other circuit of the evaporator and the heat from the water transfers from one circuit to the other to evaporate the liquid refrigerant. Advanced temperature controls and PLC's on multiple systems are used to control the unit's functions, which are capable of interfacing with PC based plant management systems. Benefits of Forced Air Cooling.


Unitec Refrigeration Services - Post-Harvest cooling technologies - hi humidity

It was thought, in the past, the 85% to 90% humidity levels, obtainable from conventional dry evaporation refrigeration systems, were adequate because of the common belief that a higher humidity would create mould and decay. Airspray systems have been specially designed for quickly cooling most vegetables, fruit and flowers after harvesting or after ripening and then to maintain constant storage environments with ultra high humidities.