The HVAC designer’s efforts, in turn, provide a basis for the building automation designer, who designs the HVAC systems for easy monitoring, control and management. In practice, the simulations are used by an HVAC system designer to determine the required systems and PLC parametres. Based on the simulation, the PLCs controlling the systems can be configured so that the relevant systems achieve optimal energy efficiency. Today, all HVAC systems and the entire operation of the building can be simulated extremely accurately using building simulation tools. HVAC systems have a key role in achieving true energy efficiency. Energy efficiency relies on good HVAC and building automation design Moreover, the systems should be designed together in one go, as this would ensure compatibility. Things might turn out better, if the device suppliers were selected first and the systems designed second. Many of the problems are caused by obsolete work practices or lack of cooperation. If even the energy management company involved in the project does not really know which values it is reporting to the customer, then there is definitely something wrong. One would think it would be everyone's benefit to know where the energy is spent, allowing those concerned to address faults before they become a problem. Energy consumption measurement alone seems to be a nearly insurmountable challenge. Sadly, this is still an everyday problem in many construction projects. Functional testing is left half undone and when commissioned, the HVAC system does not work as intended. Incompatible devices, wrong valves, unsuitable pumps and incorrect meters.
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