Heating, Ventilating, Air Conditioning (HVAC) Systems
Ventilation and air-conditioning in engineering hailed from the visionary engineers Hermann Rietschel, Stuart Crammer, Alfred Wolff and Willis Carrier who developed the idea of the technology and scientific method of engineering of air conditioning and what it entails. The building HVAC system was a means of maintaining a suitable degree of humidity within a building in every season
of the year, releasing excess humidity in seasons of high humidity, creating adequate and constant supply of ventilation in a building, providing a building with sufficient cooling or heating depending on the weather and clearing dust or soot from the air in a way that is commercially manageable in terms of costs.
You might ask yourself, what is the work of electrical engineering in HVAC system? The roles of the HVAC system have increasingly expanded to accommodate the changing modern quality of life issues. Today’s holistic structural engineering designs are recommended to address environmental design solutions like ventilation, cooling, heating, air-cleaning, humidifying and dehumidifying. It is important for these systems to be incorporated in the early stages of a project such that the mechanical system space issues as well as the building budgets on energy can be understood and put into consideration during the designing processes.
With major changes in design and issues of liability and increased complexity, HVAC systems have increasingly faced challenges with growth in design aspects.
The emerging issues related to HVAC systems include;
Wasteful energy solutions have rapidly become obsolete and the codes and standards of energy have come to push equipment manufacturers to advance their equipment efficiency and integrated systems. More and more engineering designs are absorbing renewable energy solutions into their design plans since they are considered more economically feasible. The impact of energy budgets and energy consumption is clearly understood by owners who now largely consider cheaper energy budgets like fossil fuel based energy solutions in their building designs.
- Ventilation and dedicated outside air systems
Taking into account the effectiveness of ventilation could mean that the right outside ventilation requirements for a given building or space could easily be in excess of the total sum of the people and area factor ventilation rates. Utilizing excess outside air has a major impact on cooler or heater loads and also the selection of the right equipment solutions. Moreover, the climate of the area also dictates the quantity of moisture that enters into the building. High outside air quantities may have an impact on the minimum settings on variable terminal units which may create a need for constant reheating where the terminal unit minimums get too high and make the VAV systems an energy liability to building owners.