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Volume 4

Thermal Comfort on the Move

Mastering Modern Vehicle Refrigerant Cycles for Passenger Well-Being

The secret to a premium driving experience isn't in the engine—it's in the air you breathe.

Strategic Objectives

• Master the thermodynamic principles of the vapor-compression cycle specifically for mobile environments.

• Navigate the critical transition from legacy refrigerants to eco-friendly R1234yf and R744 (CO2).

• Understand the physiological nuances of human thermal sensation to design smarter climate control logic.

• Optimize energy efficiency in modern EVs where thermal management directly impacts driving range.

The Core Challenge

While industrial cooling focuses on hardware, automotive HVAC must balance rapid pull-down, fluctuating ambient loads, and strict environmental regulations without sacrificing passenger health.

01

The Evolution of Mobile Cooling

02

Thermodynamic Foundations

03

Defining Human Thermal Comfort

04

The Modern Standard: R1234yf

05

The CO2 Revolution

06

The Heart of the System

07

Heat Exchange Mastery: The Condenser

08

Indoor Comfort: The Evaporator

09

Metering and Expansion Devices

10

Psychrometrics for the Cabin

11

The HVAC Module

12

Sensors and Feedback Loops

13

Global Warming Potential and Regulations

14

Lubrication and Chemical Stability

15

Cabin Air Filtration

16

The Impact of Solar Radiation

17

Heat Pump Integration

18

Noise, Vibration, and Harshness (NVH)

19

Diagnostics and Leak Detection

20

Thermal Management Architecture

21

The Future of Cabin Comfort

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