Frequently asked questions about cooling technologies
What is the difference between evaporative and adiabatic cooling? In which cases should you choose an open- or closed-loop cooling tower? What is subcooling? A continuously updated section to answer frequently asked questions in the industrial and civil fields.
Maximum energy efficiency can be achieved through a number of measures: for example, sizing a cooling system according to exact cooling needs, or little oversizing.
Leggi tutta la FaqChoosing the best industrial cooling system depends on several factors. Among them: the required cooling capacity.
Leggi tutta la FaqThe required cooling capacity, and the consequent sizing of the cooling system, can be calculated by an engineer experienced in industrial cooling.
Leggi tutta la FaqYes, there are calculation and sizing software: some manufacturers and cooling consultants use them in recent years to make a selection that is as tailored as possible to the needs of the individual project.
Leggi tutta la FaqThis is not something to worry about: the cooling consultant knows the right questions to ask for the selection of the best cooler, supported also by advanced software for calculation, selection, and resource optimization.
Leggi tutta la FaqPre-order consultation with an industrial cooling expert is often free of charge: consultant and customer can then jointly evaluate the selection of a cooler, based on specific project needs.
Leggi tutta la FaqEach type of industrial chiller has its own distinctive characteristics. In general, air cooling has lower efficiencies than other systems, especially in warmer seasons. In contrast, evaporative systems (wet cooling towers and evaporative gas condensers) have higher efficiencies.
Leggi tutta la FaqThere are several types of industrial cooling systems. These include: cooling towers and adiabatic coolers.
Leggi tutta la FaqAll evaporative cooling systems use the evaporation of a small amount of water to lower the temperature of the larger mass of water. There are three main types of evaporative cooling systems: open circuit cooling towers, closed circuit cooling towers, and evaporative condensers.
Leggi tutta la FaqAn adiabatic cooling system (liquid adiabatic dry cooler, gas adiabatic condenser) is a system that combines the principle of a dry cooler with adiabatic pre-cooling of outside air.
Leggi tutta la FaqEvaporative and adiabatic cooling both take advantage of air to lower the temperature of a process fluid (water, water and glycol, gas).
Leggi tutta la FaqThe main difference between the two systems is the way cooling itself takes place, especially in the different use of water and energy: both in terms of process and the amount of resources used.
Leggi tutta la FaqThe structure and components of the two systems are, of course, a consequence of the two different operating principles.
Leggi tutta la FaqIn summary: high cooling efficiency, low operating costs, and others related to the operation of the technology.
Leggi tutta la FaqAdiabatic cooling systems (adiabatic dry coolers for liquids, adiabatic condensers for gases) are the optimal solution where the goal is to save water, either due to the absence of that resource or to risks associated with its management.
Leggi tutta la FaqChoosing the system best suited to your needs depends on several factors, mainly related to the specifics of the individual plant project to be developed: an exchange of information with a cooling consultant is often helpful.
Leggi tutta la FaqWherever there is a process fluid to be cooled, up to a temperature of a few degrees above the wet bulb temperature of air, an evaporative cooling system can be used.
Leggi tutta la FaqSome main advantages can be enumerated, related to reduced water use and optimized operation during different seasons and times of the day.
Leggi tutta la FaqBoth open-circuit and closed-circuit towers exploit a very efficient operating principle: forced evaporation of a minimum amount of water causes a lowering of the temperature of the main water mass.
Leggi tutta la FaqThe difference between the two systems lies in the different type of circuit exploited for cooling the process fluid.
Leggi tutta la FaqLes condenseurs évaporatifs fonctionnent de la même manière que les tours de refroidissement en circuit fermé. La seule différence réside dans le fluide de traitement, qui est un gaz réfrigérant.
Leggi tutta la FaqAmong in main advantages: no contamination of the primary circuit and reduced risk of freezing by being able to insert ethylene glycol into the circuit, for example.
Leggi tutta la FaqBased on the partially different operating principle, there are some common and some peculiar components of the two types of evaporative cooling systems.
Leggi tutta la FaqThey vary according to type, capacity, and specific characteristics: from a few thousand euros to hundreds of thousands.
Leggi tutta la FaqIn summary: Low installation and maintenance costs and very high cooling efficiency.
Leggi tutta la FaqSubcooling is the reduction of the temperature of the refrigerant leaving the condenser.
Leggi tutta la FaqSubcooling results in an increase in the cooling capacity of the system, hence electrical savings and a higher COP (coefficient of performance).
Leggi tutta la FaqAlchemist is a patented solution from MITA Cooling Technologies that combines the useful effect of subcooling with the natural and efficient operating principle of an adiabatic cooler in a single device.
Leggi tutta la FaqA fan draws in a portion of air from the outside environment and then runs it through a finned coil inside which circulates the refrigerant to be subcooled.
Leggi tutta la FaqAlchemist can be used with any type of refrigerant.
Leggi tutta la FaqThe thermophysical characteristics of R744 make this refrigerant perfect for subcooling.
Leggi tutta la FaqAn adiabatic gas cooler must adiabatically cool the entire air flow rate of the gas cooler itself, Alchemist works only on the subcooling air flow rate.
Leggi tutta la FaqDownstream of a gas cooler in R744 systems, we have several references in commercial refrigeration, or combined with a refrigeration unit.
Leggi tutta la FaqAlchemist is designed to bring efficiency to the system, which is why it does not require frequent or special maintenance operations.
Leggi tutta la FaqAvailability of mains water and a discharge point, an electrical connection, and a junction between the Alchemist coil and the refrigerant line.
Leggi tutta la FaqCertainly. The subcooler is an environmentally sustainable solution because it provides an efficiency "boost" with each installation (COP increase).
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