Accession Number:

ADA114348

Title:

Performance Predictions for a Room Temperature, Ericsson Cycle, Magnetic Heat Pump.

Descriptive Note:

Research and development rept.,

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD PROPULSION AND AUXILIARY SYSTEMS DEPT

Personal Author(s):

• Purnell,John G.

Report Date:

1982-05-01

Pagination or Media Count:

92.0

Abstract:

The performance potential of a room temperature magnetic heat pump utilizing Gadolinium and operating on an Ericsson Cycle was investigated at magnetic flux densities of 2 and 7-Tesla which represent the upper limits of conventional and superconducting electromagnetics, respectively. At a coefficient of performance of 5, a 7-Tesla system would provide a cooling capacity of at best 1200 BTU per hour per pound of Gadolinium while a 2-Tesla system would operate at approximately 130 BTU per hour per pound of Gadolinium. Magnetic circuit efficiency was not determined but must be high 95-percent or better in order for the magnetic heat pump performance to compete with conventional cooling systems. It is unlikely the magnetic heat pump investigated could approach the performance and compactness of the conventional cooling systems unless field strengths much greater than 7-Tesla are possible. Author

Descriptors:

• *Heat pumps
• *Gadolinium
• *Magnetic devices
• Magnetization
• Heat
• Magnetic circuits
• Air conditioning equipment
• Room temperature
• Ferromagnetic materials
• Porous materials
• Plates
• Cooling
• Magnetic fields
• Thermodynamic cycles
• Computerized simulation
• Thermal analysis

Subject Categories:

• Inorganic Chemistry
• Air Conditioning, Heating, Lighting and Ventilating
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE