A660 Air Conditioning Laboratory Unit

A660 Air Conditioning Laboratory Unit

A complete, upgradeable, instrumented air conditioning laboratory unit mounted on a steel frame and castor wheels. Upgrades may be added at any stage in the unit’s long life to spread the investment costs.

The base unit comprises a variable speed radial acting axial flow fan discharging into a 250mm square duct with steam humidifier, electrical pre-heaters, direct expansion cooling coil/de-humidifier, electrical re-heaters and orifice plate for airflow measurement. Air-cooling is provided by vapour compression refrigeration system with pressure, temperature and refrigerant flow measurement. This allows the construction of a full cycle diagram and the balancing of refrigerant system energy balance against the airside energy transfer. Air condition is recorded before and after each process using precision wet and dry bulb thermometers. Instrumentation allows the electrical power to each resistive load to be measured and balanced against the air enthalpy change and mass flow.

Five Optional Upgrades include:-

A661A Digital Temperature Upgrade

A661B Recirculating Duct Upgrade

A660C PID Control Upgrade

A660D Environmental Chamber Upgrade 

A660/A/AC Computer Linked Upgrade

A660 Air Conditioning Laboratory Unit

An upgradeable fully instrumented air conditioning laboratory unit incorporating steam humidification, direct expansion refrigeration cooling and de-humidification, reheating, variable speed radial acting axial flow fan and airflow measurement. All parts in corrosion proof plastic, stainless steel, galvanised steel, brass or copper.

Psychrometric condition measured before and after each process by high precision wet and dry bulb sensors with 0 to 100% RH measurement capability.

Airflow is adjustable to at least 0.14m3/s with switchable heating up to 4kW and switchable steam injection up to 5kW electrical equivalent. Cooling is by a fully instrumented vapour compression cycle with nominally 2kW capacity.

 

     

  • Demonstration of the processes and components used in heating, cooling, humidification, de-humidification of an airstream.
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  • Measurement of air psychrometric condition before and after humidification, heating, de-humidification / cooling using pairs of precision wet and dry bulb sensors.
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  • Determination of a heat and mass balance across each process resulting in heating, cooling and humidity change using the instrumentation fitted.
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  • Construction of a complete refrigeration cycle diagram for the air-cooling plant plus an energy balance between the refrigeration circuit and the change in air enthalpy and its mass flow across the evaporator.
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  • Investigation of the volumetirc efficiency of the refrigeration compressor under varying load.
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  • Determination of the specific heat capacity of air, by measurement of the change in psychrometric condition across a heating or cooling process.
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Electrical

A: 380/415v 3 phase, 50Hz 5 wire system comprising 3 phase, neutral and earth. Line current up to 20A per phase.

 OR

B: 208/220v 3 phase, 50 or 60Hz. 4 wire system comprising 3 phases and earth. Line current up to 32 Amps per phase.

 

Clean water:

Up to 10 litres per hour at a minimum 2m head. May be mains or tank source.