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air conditioning systems are subject to physiological phenomena of contamination deriving from dust and microbiological agents?
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Alisea News

05/11/2015

Legionellosis risk at schools: how to prevent it?

Legionellosis often represents a not considered risk in biological risk evaluation of schools, but epidemics have been discovered in environments like schools, hotels and hospitals

24/10/2015

Evidences of legionellosis in a Capannoli plant

Security measures has been immediate for the infected rooms. These measures have been activated by a major's decree to debilitate the dangerous bacterium


Aeraulic Balancing

A service which checks the air flow making it possible to reduce costs and save energy consumption.

Balancing analysis of aeraulic systems is Alisea’s service that checks the air flow. To guarantee that the system works properly, or that it provides the correct quantity of fresh air, the right temperature and humidity to the environment served, is necessary considering different parameters:

  1. the size and volume of the environment served;
  2. the number of people using this environment;
  3. the speed with which the air in the ducts is supplied and circulated;
  4. the flow rate of the ducts.

Very often the initial conditions of these parameters change over time. Some office spaces are designed with movable walls, so when the ambient is modified, the size and volume of the environment served change. At other times increases or reductions in staff often determine a difference in the number of people who first used a determined space.

Even invasive and unsuitable maintenance of the system can cause malfunctioning due to several factors, establishing an air circulation at a different speed from that envisaged.
Alisea analyses the balancing of the aeraulic system estimating every possible aspect of the problem. Balometers and anemometers are used to measure the air flow rate of the ducts and of the speed of air circulation, the temperature of the premises is taken with sensitive thermometers and the humidity is calculated with a hygrometer; structural analysis is also carried out on the system to check working conditions. The information collected is compared with the data used in the planning stage of the system and estimates are made according to the new needs.


The advantages of correct and improved balancing of the system

  • ower operating costs given longer duration of the HVAC system and savings in energy consumption in those cases where flow rates can be reduced;
  • more comfort with a correct number of spare parts and of suitable air movement.
  • diagnosis and resolution of operating problems deriving from incorrect planning or improper installation of the system.