HVAC Systems Design

HVAC Systems Design

Due to the renewable energy market expansion, large cooling systems have become very common in the market, and as a result, the electricity consumption within those complexes has also increased. To this end, more and more shopping centers and individuals are investing in HVAC systems design.

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HVAC Systems Design Principles

The air cooling system design principles are based on understanding the thermal balance and humidity of the air inside the room. At the same time, the heat coming from the street, as well as the thermal energy already inside the complex, is taken into account. 

External thermal effect, represented by the following factors:

Hot Air Supply

Its loss depends on the temperature difference between the air inside and outside the room. Depending on the season, flow changes its direction. In winter, the heat flow is directed outwards, in summer – inwards.

Solar Thermal Power

In summer, this additional load must be eliminated by devices such as chillers. In winter, it is included in the total calculation of space heating or cooling.

Thermal Energy Sources In A Room

Energy sources that release heat in a room are typically:

People

Lighting

Office Supplies (Computers, Photocopiers)

In summer, heat from internal sources must be eliminated, in winter this must be taken into account when planning the expected load on the electric power system.

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Selecting Chillers Criteria

The criteria are determined based on the customers requirements and the building structure. 

The main ones are:

Architecture & Construction

Determined by the building features, how easy or difficult the installation will be. 

Operational

What operating conditions are expected and how will they be implemented? 

Sanitary and Hygienic

Temperature indices, humidity levels, and air circulation

Fire Safety Regulations

Varies by country, city and building

Economics

How much does it cost to deliver the chiller + install it

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Recommendations for Designing HVAC Systems

As a rule, chillers are installed in order to clean and ventilate the environment in addition to the building main ventilation. Therefore, the design of HVAC systems must necessarily take into account the integration with any existing ventilation system (Of course, assuming one exists). Consider the main recommendations and criteria for designing ventilation systems

  • It is necessary to take into account all the design features of the building, rooms or offices, where the air conditioning system is planned to be installed. 
  • When calculating the necessary parameters should rely on the building or room regulations
  • Document the project from the first moment in order to minimize errors in the calculations
  • In the design phase of HVAC systems, computer software manufactured by air conditioning system manufacturers should also be used. This allows you to know what the best option is, in terms of equipment (cost, quality, and functionality)
  • It is recommended to make 2-3 versions of suggestions for different ventilation solutions. This will allow customers to choose the most optimal option for them

Energy Saving Technologies in the Design Phase

When designing room cooling systems,, it is necessary to keep in mind the project energy efficiency. If possible, the chillers should be adapted to modern energy conservation trends. By energy planning you can achieve a reduction in energy consumption costs.