Refrigeration and air-conditioning systems are designed to dissipate heat from selected zones or units using a medium such as air, water or refrigerant. The purpose of these installations is to ensure the thermal comfort of people in the building or to provide optimal conditions for the technological processes carried out.
The designer must have knowledge of thermodynamics (in particular phase transitions), as well as fluid mechanics, statics and flow machinery. Calculations of heat gains in a building must be carried out in accordance with local legislation and standards.
The design of a refrigeration system must start with a calculation of the heat gains that can come from sunlight, equipment, lighting and people in the building. The results of these calculations make it possible to determine the cooling capacity of the chiller and the final cooling equipment such as fan coil units or refrigeration cabinets. Depending on the selected system and medium (water, water with glycol or refrigerant) it is necessary to select the material of the pipes and dimensions of the network of pipes, due to the maximum speed of the medium flow in the pipes and the maximum linear drops.
In order for the installation to provide adequate cooling capacity in individual sections, hydraulic calculations should be carried out, so that at properly located control valves it will be possible to balance the installation by setting the flows at the levels resulting from the calculation. All terminal equipment must be inspected for undesirable thermodynamic changes that may result in uncontrolled defrosting of the exchangers or condensation of water from the cooled air at undesirable locations.
We design all cooling systems based on ice water and refrigerants. We have experience with fan coil systems, chilled beams, chilled ceilings, thermally activated ceilings and many more. We have developed projects involving adiabatic cooling, free cooling, based on heat pumps.