Preface

In the beginning, the sole purpose of utilization of the refrigeration was to conserve food (BC 1100). But today in our daily life, refrigeration is one of the necessary areas for the aim of not only food conservation but also comfort, industrial production, electronic equip‐ ments' performance, safe and proper operation of telecommunication stations and computer rooms, space studies, etc.

Recently, there are many strategies under evaluation regarding the efficient and novel heat‐ ing-cooling methods. The main reason for that is heating-cooling uses the largest portion of overall energy in domestic and industrial usage (this rate is 45% of the final energy con‐ sumption in the EU). Therefore, the importance and wide application range of the refrigera‐ tion require new techniques and researches. In this respect, this book covers but is not limited to energy efficiency, cycle analysis, alternative techniques, modeling, industrial ap‐ plication, and capacity modulation point of view.

It is categorized into six chapters, namely:

*Chapter 1. A Simple Approach to Calculate/Minimize the Refrigeration Power Requirements*

*Chapter 2. Electrocaloric Cooling*

*Chapter 3. Food Chilling Methods and CFD Analysis of a Refrigeration Cabinet as a Case Study*

*Chapter 4. Refrigeration in Winemaking Industry*

*Chapter 5. Energy-Efficient Air-Conditioning Systems for Nonhuman Applications*

*Chapter 6. Refrigeration System Capacity Modulation Methods*

I believe that the readers not only engineering but also other science majors will find useful and practical information in the book *Refrigeration*. I would like to thank the authors for their contributions to this book.

> **Assoc. Prof. Dr. Orhan Ekren** Solar Energy Institute, Ege University Turkey
