IMST-Advanced Refrigeration Technology
A performance simulation, computer-aided engineering design system suitable for modelling vapour-compression refrigeration systems, such as freezers, cold warehouses, air/conditioning units, heat pumps and refrigeration units. Program description, company information and download area.
http://www.imst-art.com

Geothermal Heat Pump Energy - How It Works
Geothermal Heat Pumps by Sunteq/Enviroteq
http://www.geothermalheatpump.com/how.htm

Wikipedia: Heat Pump
Free encyclopedia article covering the technology basics. Addresses background, thermodynamic aspects for different types of heat pumps.
http://en.wikipedia.org/wiki/Heat_pumps

Niagara Blower Company
Niagara Blower Company, manufacturers of industrial heat transfer equipment in Buffalo New York. WSAC No-Frost or heat exchanger and heat exchangers also dehumidification
http://www.niagarablower.com

Spontaneous Flow Heat Pump
Le Site de la pompe a chaleur a ecoulement spontane
http://www.new-energy-paces.com

Transparent Energy Systems Private Limited
India. Group of companies specializing in applications of heating and cooling technology. Includes ammonia absorption refrigeration, waste heat recovery and recycling, and various forms of heat and electricity cogeneration.
http://www.tesplaarp.com

Pump World
Centrifugal Pump and Positive Displacement Pump Educational Tutorials,Pump Manufacturer Links,Mechanical Seal Manufacturer Links,Pump Distributor Links
http://www.pumpworld.com/

Led Italia
Led Italia produces industrial waste waters treatment plants. Solutions for galvanic, automotive, printing, food & beverage, mechanical, chemical, pharmaceutical, aluminium, power, biofuel, mining, industry.
http://www.leditalia.com/

Thermodynamic diagrams of alternative refrigerants for refrigeration, air conditioning and heat pump
Thermodynamic diagrams for environmentally friendly refrigerants of R134a, R227, R407C, R407B, R410A, R507, HX4, R290, CARE 50, CARE 30, hydrocarbons
http://www.geocities.com/ichen98/index.html

Geoexchange
Information on the technology from the U.S. Geothermal Heat Pump Consortium. Includes detailed case studies of applications, publications, statistics and facts.
http://www.geoexchange.org/