Water to Air Heat Exchangers
Product Code : EL-VATP-11377
Water to Air Heat Exchanger mirrors air heating and water cooling applications.
It fits on a bench top and includes a hot water supply, a cooling air duct and all instruments needed for tests on cross-flow heat exchangers.
The heat output of the design produces good results without greatly affecting the temperature of a reasonable size classroom or laboratory.
Its hot water system includes a tank with a PID controlled electric heater for stable temperatures, a pump and tank level indicators.
An electrically operated valve opens to let water in to fill the tank.
The tank has protection in case of over temperature, low water level and overfilling.
A precision needle valve and flow meter control and measure the water flow rate.
The cooling air passes down a vertical duct containing an orifice plate which connects to a differential pressure transducer.
The air then passes through a fixed speed centrifugal fan and along a horizontal duct containing the heat exchanger.
The air exits the duct through a handoperated slide-valve.
Students use the orifice and valve to measure and control the air flow.
Thermocouples at the water connectors and in the air duct measure hot and cold inlet and outlet fluid stream temperatures. Clear, multiline digital displays show the temperatures, water flow rate and orifice pressure (to calculate air flow).
For safety and simplicity, the heat exchangers have selfsealing quick connectors for their water supply. Release clamps and locating dowels hold the heat exchanger in the air duct. Students need no tools to fit and change the heat exchangers.
Each heat exchanger includes a mimic diagram that attaches to a space on the main unit panel. The diagram gives useful information to the student, including how to connect the heat exchanger. Each heat exchanger has transparent sides so students can easily see their construction and understand how they work.
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