Cooling Using The Peltier Effect
Categories: Engineering Lab EquipmentThe experimental unit demonstrates cooling using the Peltier effect. Peltier elements utilise the thermoelectric effect of some semiconductors. The thermoelectric effect is the reverse of the known...
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Description
The experimental unit demonstrates cooling using the Peltier
effect. Peltier elements utilise the thermoelectric effect of some
semiconductors. The thermoelectric effect is the reverse of the known
thermopower effect which is e.g. used when measuring temperatures using
thermocouplers. If current flows through a Peltier element, one end of the
semiconductor becomes hot and the other cold. By a suitable connection of p-
and n-doped semiconductor materials the refrigeration capacity can be increased
sufficiently to be usable.
The benefits of cold production using Peltier elements are:
Peltier elements are wear and maintenance-free, noiseless, independent of
position and easy to adjust in their refrigeration capacity via the supply
voltage. In addition, no refrigerants are required. Peltier elements are used
for small capacities in thermography as beverage chillers or in medical
engineering. Their low efficiency is a disadvantage.
Learning Objectives/Experiments
Function and operation of a Peltier element
For cooling
As heat pump
Determination of the refrigeration and heating capacity
Recording typical characteristics, such as refrigeration
capacity, via temperature differences
energy balance
Calculating the coefficient of performance
Specification
Functional model of a Peltier refrigeration system
Experimental unit with clear design of all components at the
front
Water-cooled Peltier element
Shared water circuit for heating and cooling with tank, pump
and flow meters
Electrical power freely adjustable via potentiometer
Digital displays for temperature, current and voltage
Flow meter measurement of the water flows via rotameters
Technical Data
Peltier element
max. refrigeration capacity: 191,4W
max. current: 22,6A
max. voltage: 16,9V
max. temperature difference: 77,8K
hot side temperature: 50°C
Pump
power consumption: 120W
max. flow rate: 1000L/h
max. head: 30m
Water tank
content: 7L
Measuring ranges
current: 0…20A
voltage: 0…200V
temperature: 2x -30…80°C, 4x 0…100°C
flow rate: 2…27L/h, 15…105L/h
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase
120V, 60Hz, 1 phase
quick overview :
The experimental unit demonstrates cooling using the Peltier
effect. Peltier elements utilise the thermoelectric effect of some
semiconductors. The thermoelectric effect is the reverse of the known
thermopower effect which is e.g. used when measuring temperatures using
thermocouplers. If current flows through a Peltier element, one end of the
semiconductor becomes hot and the other cold. By a suitable connection of p-
and n-doped semiconductor materials the refrigeration capacity can be increased
sufficiently to be usable.
The benefits of cold production using Peltier elements are:
Peltier elements are wear and maintenance-free, noiseless, independent of
position and easy to adjust in their refrigeration capacity via the supply
voltage. In addition, no refrigerants are required. Peltier elements are used
for small capacities in thermography as beverage chillers or in medical
engineering. Their low efficiency is a disadvantage.
Learning Objectives/Experiments
Function and operation of a Peltier element
For cooling
As heat pump
Determination of the refrigeration and heating capacity
Recording typical characteristics, such as refrigeration
capacity, via temperature differences
energy balance
Calculating the coefficient of performance
Specification
Functional model of a Peltier refrigeration system
Experimental unit with clear design of all components at the
front
Water-cooled Peltier element
Shared water circuit for heating and cooling with tank, pump
and flow meters
Electrical power freely adjustable via potentiometer
Digital displays for temperature, current and voltage
Flow meter measurement of the water flows via rotameters
Technical Data
Peltier element
max. refrigeration capacity: 191,4W
max. current: 22,6A
max. voltage: 16,9V
max. temperature difference: 77,8K
hot side temperature: 50°C
Pump
power consumption: 120W
max. flow rate: 1000L/h
max. head: 30m
Water tank
content: 7L
Measuring ranges
current: 0…20A
voltage: 0…200V
temperature: 2x -30…80°C, 4x 0…100°C
flow rate: 2…27L/h, 15…105L/h
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase
120V, 60Hz, 1 phase
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