MOUNTAIN VIEW, Calif., Feb. 28, 2012 /PRNewswire/ -- Although no significant developments have taken place in the field of heat exchangers, various improvements have been observed in aspects such as material or working fluid selection, design and distribution. Cumulatively, such incremental changes have intensified the spotlight on energy efficiency and energy conservation. With growing awareness of energy consumption and the widening gap between energy generation and consumption, steps have been taken to improve performance of existing heat exchangers, especially in heating, ventilation and air conditioning (HVAC) applications. For instance, replacing aluminum tubes with copper could help reduce the overall cost of the heat exchanger without significantly affecting its thermodynamic performance.