STT ENGINEERING site in Milan is specialized in the design of HVAC systems (heating, ventilatin and air conditioning) both in the industrial sector and in the service sector. As part of the HVAC system design activities, STT offers basic and detailed engineering services, consulting, audits and validations. Industrial HVAC systems generally provide for the control of the thermohygrometric parameters of the air, air contamination and pressurization of the environments at different levels of sterility. The HVAC design, in these areas, must be carried out by experts in the sector since of the many critical aspects of such systems. The most common applications of industrial HVAC systems concern the pharmaceutical, hospital, health, electronics, food, bioengineering and laboratory sectors. Particular applications concern the control and protection of works of art (eg museums). All environments where the control and treatment of the air must be particularly accurate. In industrial HVAC systems air filtration plays an essential role in limiting the concentration of contaminants to the design value.
Design of HVAC Cleanroom, according to ISO or GMP standard. Clean rooms are environments characterized by strict control of the level of environmental contamination. In such environments the HVAC design is the most important part of the work. The largest cleanroom applications are found in the pharmaceutical, electronics, bioengineering, food, cosmetics and aerospace and coatings sectors.
CULTURAL HERITAGE AND MUSEUMS
Goods present in museums or private collections must be protected from the natural deterioration caused by environmental agents. The control of temperature, humidity and contaminants is essential to ensure that works of art can be preserved over time. HVAC systems find particular application in museums, art galleries, churches, libraries and archives.
HEALTHCARE AND SANITARY SECTOR
In healthcare and hospital environments, HVAC design must ensure adequate levels of asepsis in order to protect the health of patients and operators. These environments are particularly critical for the purposes of the HVAC project, given that these systems must guarantee temperature, relative humidity, controlled contamination of the air and pressurization requirements.
DATA CENTER - CED
HVAC design for data center (ced) services, data centers and server rooms, telephone exchanges. Environments characterized by high internal loads and particularly critical due to the continuous information processed and stored in such systems. In these environments it is important to study the motion of air flows using CFD simulations.
Research and analysis laboratories require air quality with sufficient levels of ventilation, temperature and humidity. Variations of these parameters in laboratories can cause considerable effects on people’s health and on the control of the same processes. Given the criticality the HVAC design at the service of the laboratories must be conducted by qualified designers.
INDUSTRIAL AND SERVICE SECTOR
This category includes all HVAC systems serving the advanced industrial AND tertiary sector. HVAC systems for these applications require microclimate control (temperature and relative humidity, air speed, controlled contamination).
HVAC CFD ANALYSIS
STT ENGINEERING employs CFD HVAC (Computational fluid dynamics) simulation software applied to the HVAC sector. Thanks to these CFD HVAC software it is possible to obtain very accurate simulations both in the design phase and in checking existing systems. In the design of HVAC systems, forecasting and studying the air flows introduced and resumed by HVAC systems is fundamental in order to predict flow directions, thermal speeds, gradients and the concentration of contaminants. An application of CFD HVAC software also concerns the environmental comfort of the occupants under certain conditions.
Ensuring an adequate distribution of air and motion regimes (laminar or turbulent) and avoiding stagnation zones is essential for achieving a homogeneous air diffusion. These simulations are of great support in the design of cleanrooms, laboratories, museums, operating theaters, theaters, indoor pools, large atriums, and all those particular environments where air flow control is required
CONTAMINATION CONTROLLED ENVIRONMENT DESIGN
The cleanrooms are present in all the production departments and laboratories of the pharmaceutical industry, in hospital operating theaters, in the manufacturing of components for electronics, biomedical, aerospace, precision machining in the optics sector or of micromechanics, cosmetics, food and bioengineering sector, research laboratories.
In these contexts, HVAC systems play a fundamental role together with all the associated plant apparatuses (from thermal and refrigeration plants to the air filtration system). The HVAC system project of the air handling units and filtration systems is designed for the specific application and destination of the clean room project.
Generally the first required classification level is ISO 8 cleanroom. The lower the classification level, the greater the degree of sterility of the air inside the clean room. In these areas the CFV HVAC simulations are particularly useful as a design tool.
PROJECT LEVELS AND OPERATING ACTIVITIES
In this first phase, together with the commissioner, are defined all the requirements necessary to deal with the design of HVAC systems. These include the possible classification of the degree of contamination inside the clean room (clean room iso 8 – clean room iso 5 etc.)
After the basic engineering, detailed and constructive engineering can be carried out. In this phase the project becomes executable. All the coordination and workshop drawings necessary for the correct execution of the HVAC system are performed.
The CFD fluid dynamics simulation reserved only for the design of special HVAC systems serving complex and critical environments (eg laboratories) or where the air control must be particularly accurate (eg clean rooms, museums, data centers, etc.).
After detailed engineering, at the request of the customer, we estimate the cost of the HVAC system by carrying out market research such as to allow cost optimization but guaranteeing the performance of the designed HVAC system.
Technical assistance and supervision are provided during the construction phase of the HVAC system directly on site through regular coordinating visits. Checks are carried out during construction and site meetings together with the contractors.
Verifications, validations and tests. These activities are carried out at the end of the design and construction process of the HVAC system. The performance of the plant, as realized, is compared with those of the project. This activity is sometimes carried out as a third party for systems not of our own design.
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