The document discusses the global heat exchanger market. It notes that heat exchangers are used to efficiently transfer heat between mediums and are classified into four main types: shell & tube, plate & frame, air coolers, and cooling towers. Shell & tube and plate & frame are the most common types but are expected to grow at a slower rate than other types during the forecast period. The global heat exchanger market is projected to grow at 9% annually from 2014-2019, driven by demand in emerging economies, with Asia-Pacific expected to see the sharpest growth. The market is highly fragmented with key manufacturers including Alfa Laval, GEA Group, and Xylem.