Hvac control systems modelling analysis and design

  • How to design a HVAC system for a building?

    The first step in selecting a HVAC system is to determine and document constraints dictated by performance, capacity, available space, budgets and any other factors important to the project.
    This usually starts with a formal meeting with an architect/owner and understanding his or her requirements..

  • What are HVAC systems designed to control?

    An HVAC system is designed to control the environment in which it works.
    It achieves this by controlling the temperature of a room through heating and cooling.
    It also controls the humidity level in that environment by controlling the movement and distribution of air inside the room..

  • What is HVAC design?

    Its goal is to provide thermal comfort and acceptable indoor air quality.
    HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer..

  • The control elements include: .
    1. Sensor
    2. Controller
    3. Controlled device - Valve actuator & valve Note that the controlled variable; air temperature is what needs to be controlled.
      4. By varying the amount of hot water passing through the valve, the amount of heat being distributed to the room is controlled.
3/5AbeBooks This important new book bridges the gap between works on classical control and process control, and those dealing with HVAC control at a more elementary level, which generally adopt a qualitative and descriptive control. Google BooksOriginally published: January 1998Author: Chris P. Underwood

What is dynamic performance of a HVAC system?

Introduction It is well known that the dynamic performance of a Heating, Ventilation and Air Conditioning (HVAC) system has great impact on power and energy consumption, as well as on indoor air quality

In order to study the system performance at the design stage, it is necessary to obtain approximate mathematical models for system components

Why is HVAC control a non-trivial task?

Considering nonlinear character issues, non-stationary operational conditions and the complexity of HVAC systems the control of these systems is a non-trivial task

In practice, this commonly results in poor control performance and increased energy consumption, see Underwood (1999)


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