Lecture

Introduction to HVAC Systems

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In course

CIVIL-212: Fundamentals of indoor climate

The indoor climate impacts building performance and human well-being. This course covers fundamental knowledge of indoor air quality and thermal environment, with their assessment methods. It also outlines strategies for creating comfortable, healthy, and ...

Description

This lecture introduces the fundamentals of Heating, Ventilation, and Air Conditioning (HVAC) systems, covering topics such as thermal comfort assessment, psychrometric processes, key components of HVAC systems, and common HVAC processes like heating, cooling, and dehumidification. The lecture also explores the historical development of HVAC systems, from Willis Carrier's invention of modern air conditioning to the role of HVAC in indoor climate quality. Practical examples and exercises are used to illustrate the application of psychrometric principles in HVAC design and operation.

Instructor

Dusan Licina

Dusan Licina is a Tenure Track Assistant Professor of Indoor Environmental Quality at the School for Architecture, Civil, and Environmental Engineering (ENAC) at EPFL. He leads the Human-Oriented Built Environment Lab (HOBEL) in Fribourg since 1 June 2018. Dusan’s research and teaching are driven by the need to advance knowledge of the intersections between people and the built environment in order to ensure high indoor environmental quality for building occupants with minimum energy input. His research group specializes in air quality engineering, focusing on understanding of concentrations, dynamics and fates of air pollutants within buildings, and development and application of methods to quantitatively describe relationships between air pollution sources and consequent human exposures. His research interests also encompass optimization of building ventilation systems with an aim to improve air quality and thermal comfort in an energy-efficient manner. Throughout his career, Dusan specialized in air quality engineering, focusing on sources and transport of air pollutants in buildings, human exposure assessment, and optimization of building ventilation systems with an aim to improve air quality. Dusan completed my joint Doctorate degree at the National University of Singapore and Technical University of Denmark. He was formerly master and bachelor student in Mechanical Engineering at the University of Belgrade, Serbia. Prior to joining EPFL, Dusan worked for 3.5 years in the USA, first he was a postdoctoral researcher at the University of California Berkeley, and then he served as director on the standard development team at International WELL Building Institute (IWBI) in New York. Dusan is the recipient of several honors and awards, including Ralph G. Nevin’s award by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) given in recognition of significant accomplishment in the study of human response to the environment. He is editorial board member of the highly acclaimed Indoor Air journal. He is passionate about raising awareness about the air quality issues worldwide and developing buildings that are not only energy efficient, but that also contribute to “Michelin Star” indoor air quality.

Official source

Ontological neighbourhood

Mechanical engineering

Thermal engineering: Air conditioning

Related concepts (32)

Water cooling

Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and non-toxic; however, it can contain impurities and cause corrosion. Water cooling is commonly used for cooling automobile internal combustion engines and power stations. Water coolers utilising convective heat transfer are used inside high-end personal computers to lower the temperature of CPUs and other components.

Cooling tower

A cooling tower is a device that rejects waste heat to the atmosphere through the cooling of a coolant stream, usually a water stream, to a lower temperature. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or, in the case of dry cooling towers, rely solely on air to cool the working fluid to near the dry-bulb air temperature using radiators.

Computer cooling

Computer cooling is required to remove the waste heat produced by computer components, to keep components within permissible operating temperature limits. Components that are susceptible to temporary malfunction or permanent failure if overheated include integrated circuits such as central processing units (CPUs), chipsets, graphics cards, and hard disk drives. Components are often designed to generate as little heat as possible, and computers and operating systems may be designed to reduce power consumption and consequent heating according to workload, but more heat may still be produced than can be removed without attention to cooling.

Air conditioning

Air conditioning, often abbreviated as A/C (US), AC (US), or air con (UK), is the process of removing heat from an enclosed space to achieve a more comfortable interior environment (sometimes referred to as "comfort cooling") and in some cases also strictly controlling the humidity of internal air. Air conditioning can be achieved using a mechanical air conditioner or alternatively a variety of other methods, including passive cooling or ventilative cooling.

Central heating

A central heating system provides warmth to a number of spaces within a building from one main source of heat. It is a component of heating, ventilation, and air conditioning (short: HVAC) systems, which can both cool and warm interior spaces. A central heating system has a furnace that converts fuel or electricity to heat. The heat is circulated through the building either by fans forcing heated air through ducts, circulation of low-pressure steam to radiators in each heated room, or pumps that circulate hot water through room radiators.

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