HVAC
NABLA
HVAC
NablaHVAC — a semi-automated analysis
of ventilation in closed environments
CLIENT
Customers in the ventilation sector
CHALLENGE
Identify, in a specific closed environment, the areas that are poorly ventilated or have no recirculation, in order to improve the air distribution
SUCCESS
A new configuration of the ventilation system improved comfort and at the same time reduced energy consumption
01
CHALLENGE
Several customers ask us to identify, in a specific closed environment, the areas that are poorly ventilated or have no recirculation, in order to improve the air distribution.
In an HVAC system there are many temperature regulation systems that allow control of the comfort of the environment, in particular:
01
Ventilation
02
Air conditioning
03
Heating
04
Refrigeration (HVAC-R)
An HVAC simulation can be used to check the current operation of a ventilation system, and gives very useful insight into improving the existing air flows. HVAC analysis is also used to improve energy efficiency and reduce a system's consumption.
The CFD simulations performed by Nablawave can be applied to the air conditioning of an office, the control of air flows in warehouses and industrial plants, the ventilation of buildings, and so on.
02
SOLUTION
An HVAC analysis has to be well set up from the initial operational assumptions. After a first discussion with the customer the appropriate numerical simplifications are established, with the objectives to be achieved kept in mind.
Simplification can concern both geometry — unimportant details of the objects in the environment should be neglected, or the analysis becomes unnecessarily heavy — and physics: there is no need for complex models if the objective does not require them.
Nablawave has developed semi-automatic procedures for ventilation analysis, which can be applied to a wide range of cases and can generate data on the parameters a customer asks for, starting from 2D or 3D CAD models of the environment to be simulated.
03
RESULTS
After an initial analysis of the current state of the simulated environment we can identify the areas of air stagnation. Together with the customer we then define a new configuration of the aeration system — in terms of machine layout — to direct the flows better and obtain a more uniform aeration of the environment, avoiding recirculation zones.
We also evaluate the possible insertion of new machines and define their technical specifications, such as mass flow rate.
Analyses can be run for different environmental conditions, summer and winter, to identify the correct setting — aimed at improving comfort and reducing energy consumption.
