State-of-the-art Engineering Equipment

RAC-105 | Recirculating Air Conditioning Unit with Climate Chamber

  • Effect of typical air conditioning system components on the conditioning of room air
  • Air conditioning system with open air duct, air cooler, steam humidifier, fan, air preheaters, and reheaters
  • Determination of the volumetric air flow rate by differential pressure measurement using an inclined tube manometer
  • Combined sensors for the air humidity and temperature before and after each stage
  • Sensor for the pressure and temperature of the refrigerant
  • Refrigerant mass flow rate precisely calculated software
  • PLC based software for data acquisition (Computer not included)
  • Digital displays for air temperature, air humidity, air velocity, power
  • Investigation by test persons to be inside the chamber, (chamber is optional)
  • LxWxH: 2570x790x1750 mm
  • Weight: approx. 330 kg
Technical Specification
In many daily situations the condition of the ambient air does not meet requirements for e.g., a tropical greenhouse, the manufacture of sensitive components or even comfortable offices. The flow velocity, temperature and humidity of the air can be modified by air conditioning systems in accordance with the requirements for the desired room climate. Examines the operation and effect of the individual components of an air conditioning system. It includes all the components also used in building services engineering. Particular importance was placed on the use of original components. For air conditioning, air cooler (direct evaporator with condensing unit), steam humidifier, fan, air preheaters and reheaters are arranged in an open-air duct. Each of these components can be switched on or off individually. The effect of each individual component on the conditioning of the air is as interesting as the effect of any combination of components. Sensors record the air temperature and air humidity before and after each stage as well as the pressures and temperatures of the refrigerant. The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC. The data acquisition software is included. The software provides exact data on the condition of the refrigerant, which is used to calculate the refrigerant mass flow rate accurately. The calculation therefore gives a much more accurate result than measurement using conventional methods.
SCADA Supervisory, Control and Data Acquisition)
  • SCADA system instrumented and computer controlled via USB / Ethernet interface / WiFi to record / set process parameters and to perform related thermodynamic calculations.
  • The idea of controlling process variable and supervise possible anomalies offer great advantages if they are compared to manual procedures or process which lack of such technology.
  • Besides, the experiments are carried out more effectively. The final result reliability is much higher without doubt, therefore the work done by the researcher possess a higher credibility.
  • SCADA applications contain large number of tools which are useful particularly to the research and the studied area such as Analyzing Data in detail once the experimental process has concluded, controlling the automatically the experiments or recording the events while the tests are performed.
Data Storage
The data are stored in a data base either in file format supported by third party software. The data can be represented both numeric format or graphic format like their trends and distributions independently the way it is used. As being available for the users anytime allows different tests to be compared and reach conclusion more truthful.
Control Algorithm
The control algorithm codification about the process offers uncountable interesting points compared to manual actions. The parameters can be controlled as in the case of any hardware element programmatically and with total independency of SCADA architecture used. Not only saving time is achieved but it is perfected over the implemented methodology and major exhaustive control for variables which are take part of the experimental process.
Steam humidifier
  • power consumption: 2kW
  • steam capacity: 3kg/h, switchable in three stages
  • power consumption: 167W
  • volumetric flow rate: 1150m3/h
  • speed: 1000…2600min-1
  • Δpmax: 460Pa
  • power consumption: 1kW at -5/50°C
  • refrigeration capacity: 2.1kW at -5/50°C
  • filling volume: 3.1kg
Measuring ranges
  • differential pressure: 0…100Pa
  • temperature: 5x 0…50°C, 4x -100…200°C
  • humidity: 5x 10…90%
  • pressure: -1…15bar, -1…24bar (refrigerant)
  • flow rate: refrigerant calculated 0…80kg/h