TARB Recirculating Air Conditioning Unit

9.2.- HEATING, VENTILATION, AIR CONDITIONING AND HOT WATER
RECIRCULATING AIR CONDITIONING UNIT - TARB

INNOVATIVE SYSTEMS

The objective of the Recirculating Air Conditioning Unit, "TARB", is to introduce the student into the complex world of air conditioning systems, as well as studying and determining the optimal parameters for the operation of the unit in function of the environmental requirements (humidity, heat, temperature and cooling, etc.).

See general description

Expansions

ICAI

Interactive Computer Aided Instruction Software

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General Description

The Recirculating Air Conditioning Unit, "TARB", has been designed to study both the changes in the air conditions and the refrigeration circuit. For that purpose, temperature sensors, pressure meters and flow meters have been strategically located, allowing to study the refrigeration cycle and to quantify the capacity of the evaporation and condensation unit.

It can work with fresh air and recycled air.

The unit basically consists of a testing tunnel made of stainless steel, which has four windows (sight glasses). Inside there is an axial fan, two heating elements, one at the inlet of the evaporation unit of 2000 W and other at the outlet of 1000 W. There are also five hygrometers strategically located along the tunnel. These hygrometers consist of two temperature sensors (wet and dry bulb).

Exercises and guided practices

GUIDED PRACTICAL EXERCISES INCLUDED IN THE MANUAL

  1. Demonstration of the processes of air heating, cooling, humidification, de-humidification, recirculating and mixing.
  2. Efficiency determination of the preheating element.
  3. Preheating effect in an air conditioning installation.
  4. Dehumidification process study.
  5. Mass balance in the evaporator.
  6. Energy balance in the evaporator.
  7. Re-heat effect.
  8. Experimental determination of the air specific heating capacity.
  9. Study of de-humidification in a recycling process.

MORE PRACTICAL EXERCISES TO BE DONE WITH THE UNIT

  1. Psychrometric chart.
  2. Usage of Psychrometric chart.
  3. Determination of the air flow.
  4. Example of the air properties determination.
  5. Properties of the refrigerant R-513a.
  6. Enthalpy-Pressure diagram for the refrigerant R-513a.
  7. Demonstration of recirculating and the adiabatic mixing of two air streams at different states.
  8. Obtaining of the steam generator efficiency curve.
  9. Energy balance in the steam generator.

REQUIRED ELEMENTS

ADDITIONAL RECOMMENDED ELEMENTS

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