heat engine & heat pump

1. University of halabja
college of science
department of physics
second stage
Heat engine&heat pump
Name propered by :Shene aziz

2. Out line:
Principle heat engine
What is the heat engine
What is application heat engine?
Principle heat pump
What is heat pump?
What is application heat pump?
Different between heat pump &heat engine

3. What is the heat engine:
A heat engine is a system which converts heat into work by taking heat from
the reservoir ( hot body) to carry out some work. There is a discharge of
some heat to the sink (cold body). In this system, there will also be some
waste in the form of heat.

4. Principle heat engine:
The working substance receives heat from a high-temperature source and a
part of that heat is transformed into work and the rest amount of heat is
respected in the heat sink at low temperature. This is the principle of the heat
engine.

5. Application heat engine:
Internal combustion engines are the most common form of heat engines, as they are
used in vehicles, boats, ships, airplanes, and trains.

6. Principle heat pump:
The operating principle of a heat pump is based on the physical property that the
boiling point of a fluid increases with pressure. By lowering pressure, a medium
can be evaporated at low temperatures while an increase of pressure will lead to a
high boiling point. The graph at the left side shows this principle.

7. What is the heat pump:
The air source heat pump absorbs heat from the outside air into a liquid
refrigerant at a low temperature. Using electricity, the pump compresses the
liquid to increase its temperature. It then condenses back into a liquid to release
its stored heat. Heat is sent to your radiators or underfloor heating.

8. Application heat pump:
Heat pumps in the food industry can save your costs spent on gas. To your
food and beverage industry, heat pumps help in the process of beer brewing
and to concentrate waste beer. Not only to concentrate waste beer but also to
concentrate liquid products in the dairy industry.

9. Different between heat pump &heat engine:
Heat engines are the devices which convert the thermal energy into mechanical
work, while heat pumps transfer heat energy from low temperature to high
temperature Heat engines extract heat from a high temperature source, convert a
part of it into work and reject the remaining to a low temperature sink. The
opposite happens with a heat pump. When user supplies work to a pump, it
extracts heat from the low temperature source and pumps it to the high
temperature source.

11. Reference:
• Murray, N.K., O'Neal, D.L. and Heffington, W.M., 1996. Thermal
interference of adjacent legs in a vertical U-tube heat exchanger for a
ground-coupled heat pump. ASHRAE Transactions-American Society of
Heating Refrigerating Air-conditioning Engine, 102(2), pp.12-21.
• Shatalov, I., Shatalova, I., Antipov, Y. and Sobennikov, E., 2017. Utilization of
secondary energy resources of metallurgical enterprises using heat pump.
Journal of Fundamental and Applied Sciences, 9(7S), pp.342-352.