Texas Education Agency
Texas Gateway: Applications of Thermodynamics: Heat Pumps and Refrigerators
By the end of this section, you will be able to describe the use of heat engines in heat pumps and refrigerators, demonstrate how a heat pump works to warm an interior space, explain the differences between heat pumps and refrigerators,...
Georgia State University
Georgia State University: Hyper Physics: Heat Flow to Hotter Region
Heat flow from a hot region to a cold region is described and explained. Applications of this phenomenon (specifically heat pumps and refrigerators) are discussed. Excellent graphics.
Georgia State University
Georgia State University: Hyper Physics: Heat Engine Concepts: The Otto Cycle
Schematic diagrams illustrating the operation of a four-stroke engine cycle. Interactive buttons allow you to step through the various steps of each engine cycle. Each graphic is accompanied by an excellent explanation.
Georgia State University
Georgia State University: Hyper Physics: Heat Engine Concepts: Carnot Cycle
The Carnot cycle is described, illustrated and explained. The Carnot efficiency equation is given and interactive JavaScript form allows the visitor to investigate the effect of the reservoir temperature and the sink temperature upon the...
Georgia State University
Georgia State University: Hyper Physics: Law Concepts
This site from Georgia State University Department of Physics and Astronomy is an indexing page for the HyperPhysics site. The page links to a variety of other pages which discuss concepts related to entropy and the second law of...
Georgia State University
Georgia State University: Hyper Physics: Heat Engine Cycle
The heat engine cycle is defined and discussed. So pressure-volume diagrams are introduced and their use in depicting the cycles of a heat engine is demonstrated. Informative graphics are accompanied by reason-filled explanations.
Georgia State University
Georgia State University: Hyper Physics: Heat Engine Concepts
An indexing page for the HyperPhysics site. The page contains a concept map of links to a variety of other pages which discuss concepts related to heat engines. All pages contain informative graphics and excellent explanations.
Georgia State University
Georgia State University: Hyper Physics: Heat Pump
Heat flow from a hot region to a cold region is described and explained. Applications of this phenomenon (specifically heat pumps and refrigerators) are discussed. Excellent graphics.
Georgia State University
Georgia State University: Hyper Physics: Entropy
This informative site is from Georgia State University. The tendency of nature to move towards a more disordered state in an isolated system, a concept known as entropy, is discussed. This concept is well-depicted in meaningful diagrams.
Georgia State University
Georgia State University: Hyper Physics: Heat of Fusion
The heat of fusion is defined and described. A graphical representation of the heat of vaporization is given. A method for measuring and calculating the heat of fusion is also presented and explained.
![Thermal Physics Module: Refrigerators and Heat Pumps [Pdf] Website](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Thermal Physics Module: Refrigerators and Heat Pumps [Pdf] Website")
University of Sydney (Australia)
Thermal Physics Module: Refrigerators and Heat Pumps [Pdf]
Refrigerators and heat pumps are described. Their operation is explained and the variables which improve their efficiency is discussed.
Ducksters
Ducksters: Environment for Kids: Geothermal Energy
Kids learn about geothermal energy and how this renewable power can help the environment. Teach students about heat pumps and electric plants.