1. Ch. 1 Introduction to HVAC & R
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

2. HVAC&R: Heating, Ventilating, Air Conditioning, and Refrigeration
1.1 Historical Overview
HVAC&R: Heating, Ventilating,
Air Conditioning, and Refrigeration
Heating
fire: cooking + space
heating(convection + radiation)
- Korean Ondol system: thermal storage
- forced air circulation
- steam and hot-water boilers
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

3. - Ventilation: introduction of clean outside air
- ASHVE(American Society of Heating and Ventilating Engineers), 1893 : 14 Liter/s per person
- ASHRAE(American Society of Heating, Refrigerating, and Air Conditioning Engineers):
- SAREK( Society of Air-Conditioning and Refrigerating Engineers of Korea):
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

4. cooling  control of temperature, humidity, and
Air Conditioning
cooling  control of temperature, humidity, and
airborne-contaminant concentration
- Willis Carrier: introduction of psychrometrics
Refrigeration
- refrigeration of food
vapor-compression refrigeration: a method to
cool fever, ammonia
- 1930s: CFCs by DuPont
environmental issues:
R-12  R-134a,
R-22  R-410a, R-407c
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

5. 1.2 Overview of HVAC System Design
Applications
- human occupancy
- animals
- vegetation
- preservation and storage facilities
- special industrial processes
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

6. Indoor Environmental Parameters - temperature - humidity - air motion
- airborne contaminants
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

7. Thermal Engineering Lab. , Dept
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

8. Heating and Cooling Loads
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

9. - sensible heating or cooling - latent heating or cooling
Processes
(basic air treatment)
- sensible heating or cooling
- latent heating or cooling
- gas and vapor removal
- particulate removal
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

10. - direct contact humidifiers and air washers
Equipment
- heat exchanger
- direct contact humidifiers and air washers
- gas and particulate filters
Systems
- packaged(unitary) systems
- larger systems assembled on site
- refrigeration system, hydronic systems
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

11. pneumatic controls: compressed air, simple and robust
- direct digital controls: more options
Energy Use and Cost
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University

12. ASHRAE: Handbooks 대한설비공학회: 설비공학편람 1.3 Summary
Thermal Engineering Lab., Dept. of Mechanical Engineering, Sogang University