Depending on the application, equipment can be more energy efficient and less noisy, explains engineerAs in other sectors, the cold market also has its controversies.One of these controversies that circulate to this day among engineers, technicians, mechanics and installers is around the comparison of efficiency between rotary, scroll and reciprocating compressors.In general, this doubt arises when there is a need to replace this component, whether in the air conditioning or refrigeration unit.It is also relevant when choosing new projects and installations.When selecting the most suitable item, the professional also seeks to benefit his client, through the choice of less noisy and more economical components, which reduce the value of electricity bills.“I always hear that rotary and scroll compressors are more efficient than the alternative model.The correct answer is: it depends”, says mechanical engineer Edson Girelli.Founder of Girelli Refrigeração, from Paraná, the entrepreneur explains that in a small ΔP range, in the particular case of air conditioning equipment, in which high evaporation temperature compressors, or simply HBP, are used.The equipment has a shaft with several blades attached to it.“Even so, some care must be taken when applying these compressors, because they work very well with little variation in the operating regime, and this applies to air conditioners and almost nothing to cold rooms”, he compares.A rotary air compressor is suitable for anyone who is concerned about noise, as it is small and silent.The equipment has a shaft with several blades attached to it.This compressor operates by “pushing” the refrigerant through the cylinder, while compressing it at the same time.Scroll compressors are equipped with two identical parts, in the form of a spiral or scroll.By using one electric motor to rotate around the other, this process compresses the coolant into the system, pushing it towards the center of the rollers.They are more efficient than standard compressors, which use pistons.With this, they can save more energy, last longer and keep the environment quiet.The integrated work of the two stages allows the system to modify the compressor speed from 25% to 100%.“Scroll compressors are a middle ground between rotary and reciprocating, in terms of envelope operating range, and can operate even in low evaporation temperature regimes, as long as the manufacturer indicates it for this application.Normally, it is decided to use artifices such as liquid injection or intermediate expansion systems”, points out Girelli.The most popular model available on the market today, the reciprocating compressor has a piston that moves fluid up and down within the unit's cylinder.As it moves the fluid downwards, it creates a lower pressure ('a vacuum') that sucks in the refrigerant.As it rises, the gas is compressed and moves to the condenser.“However, when the ΔP is high, in the case of low-temperature systems, or even when the operating regime is production and not conservation, the best choice for small and medium-sized systems is the traditional reciprocating compressor, such as the tunnel. of freezing”, adds the engineer.Your email address will not be published.Mandatory fields are marked with *Depending on the application, equipment can be more energy efficient and less noisy, explains engineerLegal notice: The texts posted by Repórter do Frio on this blog are protected by the Creative Commons – Attribution 4.0 International license.