THERMO-ELECTRIC HEAT PUMP UNIT

This unit has been designed to enable students to investigate the performance of a semi-conductor module which, on the application of an electrical power supply, produces a refrigerating effect. Though the power required to produce this cooling effect is high, modules of this type find applications in a variety of high-technology fields. Conversely, by producing a temperature difference across the module, a direct conversion of heat to electrical energy results. Learn about THERMO-ELECTRIC HEAT PUMP UNIT manufacturers for optimal educational outcomes.. Due to inefficiency, the power produced per module is small, but applications exist where alternatives are either unavailable or impractical. The semi-conductor assembly is mounted on a heat sink projecting through the front face of the glass-reinforced plastic instrument panel. Learn about THERMO-ELECTRIC HEAT PUMP UNIT specifications for optimal educational outcomes.. The assembly consists of a module sandwiched between aluminium blocks, providing both mechanical strength and thermometer wells for temperature measurement. A nickel-chrome alloy element heats the outer face of the cold-side aluminium block, thermally insulated within a stainless steel casing. Learn about THERMO-ELECTRIC HEAT PUMP UNIT for educational labs for optimal educational outcomes.. Each experimental configuration can be established simply by sequenced switching of four control switches. Variation of power supplied to both the heater and semi-conductor module is achieved by separate long-life heavy-duty rheostats. Learn about THERMO-ELECTRIC HEAT PUMP UNIT price for optimal educational outcomes.. Power is measured using separate ammeters and voltmeters. A small lamp provides a load that may be switched across the module to investigate the generating effect, with a milliammeter and voltmeter allowing measurement of the power generated. Learn about THERMO-ELECTRIC HEAT PUMP UNIT equipment for optimal educational outcomes..

Construction:

• Panel: High quality ABS
• Module assembly: Semi-conductor thermo-electric device with hot and cold side thermometer pockets and insulated heater

Instrumentation:

• Voltmeters × 3: Moving coil; 2 × range 0–5V; 1 × range 0–1.5V
• Ammeters × 3: Moving coil; 2 × range 0–15A; 1 × range 0–250mA
• Thermometers × 3: 300mm liquid-filled glass; 1 × range -100 to +110°C; 1 × range 0–150°C; 1 × range -50 to +30°C
• Rheostats × 2: Rotary triple graded with silver graphite brush
• Switches × 4: Multi-pole changeover switches

Power Supply:

• Internally mounted: single transformer, full-wave rectifier and capacitor smoothing
• Provides a DC supply of approximately 5 volts

Safety Features:

• All electrical components earthed and mains supply fused
• Both module and heater operate on a safe low-voltage DC supply