Jun. '99 An Outlook on Residential HVAC&R Applications in 2020 Summary of predicted results of upcoming changes in homes, speculation on impacts on residential HVAC&R equipment and applications and introduction of new research initiative (HVAC&R Research for the 21st Century, 21-CR) aimed at helping industry keep up.
Nov. '98 Copper: Technology & Standards Brief history of copper mining techniques from earliest industrial mining days through flash smelting, electrorefining, solvent extraction and electrowinning. Also covers changes in fabrication and production techniques.
May. '98 Copper DX Geothermal Heat Pump Web Site The Copper Development Association (CDA) is sponsoring the creation of a web site designed to allow homeowners to compare the economics of heating and cooling their homes with copper direct exchange (DX) heat pump systems.
Feb. '98 CDA Backs DX Geothermal Heat Pump R&D Look at research sponsored by the Copper Development Association to gain a better understanding of direct exchange ground coupled heat pumps (DX/GCHP) in order to make them a commercial success for home heating/cooling.
Dec. '97 Direct Exchange Thermal Systems: The Wave Of The Future Heat pumps! While the term seems relatively new, Nicholas Carnot proposed the concept in 1824. While heat normally flows from hot to cold, Carnot reasoned that a mechanical device could be built to reverse the process and "pump" heat from a cooler region to a warmer region.