Ch 3 Basics of Heating and Air Conditioning
Nov 23, 2015
Ch 3 Basics of Heating and Air Conditioning
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Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
OBJECTIVESAfter studying Chapter 3, the reader should be able to:Explain the purpose of the heating, ventilation, and airconditioning (HVAC) system in automobiles and other vehicles.Discuss temperature and humidity comfort zones.Explain how heat is measured in both temperature and quantity, using either metric or U.S./British units.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
INTRODUCTIONFor the most part, the HVAC system of an automobile is designed to provide comfort for the driver and passengers. It is intended to maintain in-car temperature and humidity within a range that is comfortable for the people inside and provide fresh, clean air for ventilation.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
INTRODUCTION
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
INTRODUCTION
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
INTRODUCTIONThe HVAC system in a vehicle (Figure 3-2) can be divided into three closely related subsystems:Air distribution, also called air management, with the control system: The HVAC case with doors that control the air flow.Heating: The heater core that heats the air.Refrigeration, A/C: The evaporator core that cools the air.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEATHeat is a form of basic energy, and, like other forms of energy, heat cannot be created or destroyed. It can, however, be converted to or from other forms of energy.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT MEASUREMENTA heating and air-conditioning technician is concerned with measuring two different aspects of heat: intensity and quantity. Intensity is what we feel; it is measured in degrees, on either a Celsius or Fahrenheit scale. Quantity is the actual amount of heat; it is measured in either calories or British thermal units (Btu).
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT MEASUREMENTHeat IntensityMeasuring IntensityHeat QuantityMeasuring Quantity
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT MEASUREMENT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT MEASUREMENT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT MEASUREMENT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
HEAT MEASUREMENT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
COMFORTOur goal in heating and air conditioning is to maintain a comfortable in-vehicle temperature and humidity. This is affected by the size of the vehicle, the number of passengers, and the amount of glass area, to name only a few variables.HumidityCleanliness
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
COMFORT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
COMFORT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
COMFORT
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
SUMMARYHeat is moved into or out of the passenger compartment to obtain a good comfort level.Heat intensity is measured using the Fahrenheit and Celsius scales, and heat quantity is measured using calories and BTUs.The comfort zone of most humans is between 65 and 80F (21 and 27C).A/C systems reduce humidity by removing water from the air.HVAC systems clean air because particles are caught by moisture on the evaporator and by filters.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
REVIEW QUESTIONSHVAC is short for _________, _________, and __________________.A typical HVAC system uses a(n) _________ to cool the air, a(n) to warm the air, and _________ or _________ to control the air flow._________ is a form of energy that makes us feel warmer, and _________ is the absence of heat.Heat intensity is commonly measured using either the _________ or _________ scale.A temperature of 100C is equal to _________ F.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
REVIEW QUESTIONSHeat quantity is commonly measured using units of _________ or _________.Heat always moves from _________ to _________.The A/C system can make air _________, _________, and _________.RH is generally _________ as air warms up.Moisture that collects on the evaporator reduces the _________ in the vehicle.
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZA vehicles HVAC system contains a(n) _________ system.A/CHeaterair distributionAll of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZA vehicles HVAC system contains a(n) _________ system.A/CHeaterair distributionAll of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ2.Air-conditioning systems control which of the following in a vehicle?TemperatureHumidityAir cleanlinessAll of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ2.Air-conditioning systems control which of the following in a vehicle?TemperatureHumidityAir cleanlinessAll of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ3.Two students are discussing heat movement. Student A says that heat is a form of energy. Student B says heat travels from hot to cold. Who is correct?Student AStudent BBoth A and BNeither A nor B
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ3.Two students are discussing heat movement. Student A says that heat is a form of energy. Student B says heat travels from hot to cold. Who is correct?Student AStudent BBoth A and BNeither A nor B
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ4.Heat intensity refers to which of the following?The amount of heat in an areaThe number of Btu in an areaThe heat individuals feelNone of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ4.Heat intensity refers to which of the following?The amount of heat in an areaThe number of Btu in an areaThe heat individuals feelNone of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ5.The freezing point of water is _________ on the Celsius scale.100032212
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ5.The freezing point of water is _________ on the Celsius scale.100032212
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ6.The boiling point of water is _________ on the Fahrenheit scale.032100212
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ6.The boiling point of water is _________ on the Fahrenheit scale.032100212
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ7.Student A says that 1 c of heat can increase the temperature of 1 g of water by 1F. Student B says the temperature will increase 1C if 1 c is added. Who is correct?Student AStudent BBoth A and BNeither A nor B
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ7.Student A says that 1 c of heat can increase the temperature of 1 g of water by 1F. Student B says the temperature will increase 1C if 1 c is added. Who is correct?Student AStudent BBoth A and BNeither A nor B
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZThe normal temperature for the average human is _________.80F100F60F98.6F
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZThe normal temperature for the average human is _________.80F100F60F98.6F
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ9.The amount of moisture contained by air is called _________.TemperatureAmbientHumidityNone of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ9.The amount of moisture contained by air is called _________.TemperatureAmbientHumidityNone of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ10.In addition to cooling the passenger compartment, an airconditioning system _________.heats the passengersdehumidifies the airputs moisture in the airAll of these
Automotive Heating and Air Conditioning, Fifth EditionBy Tom Birch 2010 Pearson Higher Education, Inc.Pearson Prentice Hall - Upper Saddle River, NJ 07458
CHAPTER QUIZ10.In addition to cooling the passenger compartment, an airconditioning system _________.heats the passengersdehumidifies the airputs moisture in the airAll of these
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