Air Conditioning

Thermotronics » Air Conditioning

Air Conditioning (AC) is the process of removing heat and moisture from the interior of an occupied space, to improve the comfort of occupants. It can be used in both domestic and commercial environments and it is most commonly used to achieve a more comfortable interior environment, typically for humans and animals; however, air conditioning is also used to cool/dehumidify rooms filled with heat-producing electronic devices, such as computer servers, power amplifiers and even to display and store artwork. In industrial applications, the process is used to ensure correct operation of equipment or machinery that need to operate in specific environmental conditions or alternatively to be able to carry out certain industrial processes, such as welding, which produce considerable amounts of heat that needs to be disposed of in some manner. An air conditioning system must be effective regardless of outside climatic conditions and involves control over four fundamental variables: air temperature, humidity, movement and quality. The main process underlying air conditioning is the exchange of heat and water vapor between the indoor and outdoor environments and the people inside the air-conditioned space. The air conditioning’s main principles are Evaporation and Condensation, then Compression and Expansion (for engineers and physicists we talk about thermodynamics). For this field, De Lorenzo has designed some panels to simulate the behavior, with the help of a CAI software, such as the reproducing of a hall (theatre or cinema) to be air-conditioned, the reproducing of environment composed of offices, provided with a mixed air-water conditioning system with four-duct air convectors, the reproducing of domestic air conditioning systems (window single block, portable and fixed split types) and the reproducing of fixed air-conditioner split type with air-air heating pump for cooling and heating the ambient. Three of the latter four simulators are also available all-in-one two-side simulator. The air conditioner works with the same way whether it is installed in a building or in a car and for this reason, De Lorenzo has designed a simulator to allow the complete learning of the techniques and of the electromechanical and electronic devices usually used for the regulation and control of automotive air conditioning. A trainer with real components is also available and consists of control panel, outdoor and indoor units of an air-conditioning system with measuring instruments and AC power supply control unit. A fault simulator, for troubleshooting, is provided in all of them and they can be interfaced to personal computer. They are recommended for professional institutes, vocational schools and technical colleges.

Products Details

AIR‐CONDITIONING SYSTEM

The simulator allows the study, the performing of experiments and the troubleshooting for the following system:
• Full air, single duct, constant capacity air‐conditioning system, for single zone with regulation on the heating, cooling and post‐heating batteries
This system is reproduced on the panel, through a colour representation which allows a complete analysis of the fluid circuit, of its components and of the electrical/electronic circuit for control and regulation.
TRAINING OBJECTIVES
It is possible to simulate the behaviour of components and systems, on the basis of the operating conditions which can be monitored directly on the panel or through Personal Computer by teacher and students.
The Personal Computer constantly keeps under control the simulation in progress and displays its behaviour through analog and digital signals and meters; in this way the student, through measurements and tests, can go on with the troubleshooting.
TECHNICAL DESCRIPTION
The full air, single duct, constant capacity air‐conditioning system, for single zone with regulation on the heating, cooling and post‐heating batteries is composed of the following main elements:
• Air treatment unit (ATU) complete with heating, cooling, humidifying and post‐heating batteries
• Air duct, complete with inlet fan, recovery fan, motorized shutter for ejecting, mixing and renewing the treated air
• Boiler and refrigerating unit for the production of the hot and of the cool fluid to be used in the ATU batteries
• Electronic station for data recording concerning temperature and humidity and for the subsequent adjustment and opening of the actuators and devices for the air‐conditioning
• Ambient to be air‐conditioned composed of a show hall (theatre, cinema), provided with system for air delivery from the bottom and its recovery from the top
• Possibility to simulate the external temperature and humidity conditions
• Possibility to simulate the crowding of the hall and, consequently, the relevant thermal and sensitive loads
• Possibility to display the percentages of the ejected, recycled and renewed air
• Possibility to display the temperature and the humidity of the treated air, in various points of the system
• Possibility to display the temperatures of the hot and cool fluid on the batteries of the ATU

DL TM05

MIXED AIR‐CONDITIONING SYSTEM

The simulator allows the study, the performing of experiments and the troubleshooting for the following system:
• Mixed air‐water conditioning system, with four‐duct air convectors
This system is reproduced on the panel, through a colour representation which allows a complete analysis of the fluid circuit, of its components and of the electrical/electronic circuit for control and regulation.
TRAINING OBJECTIVES
It is possible to simulate the behaviour of components and systems, on the basis of the operating conditions which can be monitored directly on the panel or through Personal Computer by teacher and students.
The Personal Computer constantly keeps under control the simulation in progress and displays its behaviour through analog and digital signals and meters; in this way the student, through measurements and tests, can go on with the troubleshooting.
TECHNICAL DESCRIPTION
The mixed air‐water conditioning system, with four‐duct air convectors is composed of the following main elements:
• Air treatment unit (ATU) complete with heating, cooling, humidifying and post‐heating batteries;
• Air duct, with delivery fan, ejection fan, motorized shutter for treated air ejection and treated air renewal
• Boiler and refrigerating unit for the production of the hot and of the cool fluid to be used in the ATU batteries and in the four‐duct air convectors;
• Electronic station for data recording concerning temperature and humidity and for the subsequent adjustment and opening of the actuators and air‐ conditioning devices;
• Environment to be air‐conditioned composed of offices, provided with four‐duct air convectors, system for air delivery and for its recovery;
• Possibility to simulate the external temperature and humidity conditions;
• Possibility to simulate the crowding of the offices and, consequently, the relevant thermal and sensitive loads;
• Possibility to display the percentages of the renewed air;
• Possibility to display the temperature and the humidity of the treated air, in various points of the system;
• Possibility to display the temperatures of the hot and cool fluid supplying the batteries

DL TM06

DOMESTIC AIR‐CONDITIONING SYSTEMS

The simulator allows the study, the performing of experiments and the troubleshooting for the following systems:
• window single block air‐conditioner
• portable air‐conditioner, split type
• fixed air‐conditioner, split type
These systems are reproduced on the panel, through a colour representation which allows a complete analysis of the fluid circuit, of its components and of the electrical/electronic circuit for control and regulation.
TRAINING OBJECTIVES
It is possible to simulate the behaviour of components and systems, on the basis of the operating conditions which can be monitored directly on the panel or through Personal Computer by teacher and students.
The Personal Computer constantly keeps under control the simulation in progress and displays its behaviour through analog and digital signals and meters; in this way the student, through measurements and tests, can go on with the troubleshooting.
TECHNICAL DESCRIPTION
The portable air‐conditioner, split type, consists of the following main elements:
• single‐phase motor compressor
• condenser with ventilation through single‐phase electric motor
• evaporator with ventilation through single‐phase electric motor
• capillary pipe
• regulation thermostat
• fan speed internal selector
• main switch
• switch for compressor insertion
• single‐phase motor‐driven pump for condensate evacuation
• possibility to simulate the internal and external temperature
• possibility to display the temperature values of the treated air
The fixed air‐conditioner, split type consists of the following main elements:
• single‐phase motor compressor
• condenser with ventilation through single‐phase electric motor
• evaporator with ventilation through single‐phase electric motor
• capillary pipe
• regulation thermostat
• fan speed internal selector
• main switch
• switch for compressor insertion
• possibility to simulate the internal and external temperature
• possibility to display the temperature values of the treated air

DL TM07

HEAT PUMP AIR‐CONDITIONING SYSTEM

The simulator allows the study, the performing of experiments and the troubleshooting for the following system:
• Fixed air‐conditioner, split type, with air‐air heating pump, for cooling and heating the ambient
This system is reproduced on the panel, through a colour representation which allows a complete analysis of the fluid circuit, of its components and of the electrical/electronic circuit for control and regulation.
TRAINING OBJECTIVES
It is possible to simulate the behaviour of components and systems, on the basis of the operating conditions which can be monitored directly on the panel or through Personal Computer by teacher and students.
The Personal Computer constantly keeps under control the simulation in progress and displays its behaviour through analog and digital signals and meters; in this way the student, through measurements and tests, can go on with the troubleshooting.
TECHNICAL DESCRIPTION
The fixed air‐conditioner, split type, with air‐air heating pump, for cooling and heating the ambient is composed of the following main elements:
• Single‐phase motor compressor
• Condenser/evaporator with ventilation through single‐ phase electric motor
• Evaporator/condenser with ventilation through single‐ phase electric motor
• Two expansion thermostatic valves
• Two single‐direction valves for by‐pass circuits
• Monostable electro valve for inversion of the refrigerating cycle
• Liquid tank
• Regulation thermostat
• Internal fan speed selector
• Main switch
• Cooling/heating selector
• Possibility to simulate the internal and external temperatures
• Possibility to display the temperature values of the treated air

DL TM08

AIR‐CONDITIONING FOR AUTOMOBILES

To cool the external air refrigerating compressor based systems are exclusively used.
The compressor, activated by the engine, compresses the refrigerant which consequently warms up; in the condenser the working fluid is cooled until it reaches the liquid phase.
The cooling is obtained by giving heat to the exterior in the zone around the compressor.
The cooled fluid expands in the expansion valve and in the evaporator and is transformed to gas.
The heat necessary for such transformation is subtracted from the entering cool air.
The simulator analyzes all the phases of the refrigeration cycle.
In particular:
• Relations between temperature and pressure in the refrigerant
• Operation of the compressor
• Operation of the condenser
• Pressure switches
• Temperature regulation.

DL AM01

AIR CONDITIONING TRAINER

The trainer is a heat pump split air conditioning system, which gives students advanced instructions on the components and operation of an air conditioning and refrigerating system.
The trainer includes refrigerating, electrical control, fault insertion, and fault elimination systems.
It consists of: control panel, outdoor unit and indoor unit of an air‐ conditioning system, measuring instruments, AC power supply control unit, fault insertion unit and fault elimination unit, etc.
Features:
• It utilizes an actual refrigerating unit with the functions of refrigerating, heating, ventilating, dehumidifying, temperature and wind speed selection, timing, sleeping, etc.
• It integrates: refrigerating system, electrical control system, fault insertion system and fault elimination system, meeting the training requirements of an air conditioning and electrical control system.
• It clearly shows the inner components layout and refrigerating cycle system structure; it demonstrates the operating principle of a heat pump type air conditioner; it comes with AC voltmeter, AC ammeter, thermometer, vacuum pressure gauge, pilot lamps, and LED to show the system real‐time status; the main control board is covered with a transparent board to facilitate observation; schematic diagram of control system and relative test points are available; sight glass in the pipeline is used to observe refrigerant status; HV pipeline is marked with red, while LV pipeline with blue, relative components are all labeled.
• It includes a connection area for electrical control circuit of outdoor unit to train students' hands‐on ability.
• Fault insertion and suppression.

DL TMAC10

INTRODUCTION TO THE AIR CONDITIONING SYSTEMS

Two‐side simulator for the study of different air‐conditioning systems.
‐ SIDE A simulates two types of systems: the mixed (air‐water) air‐conditioning systems and the systems that are used for the air‐ conditioning of a show hall (theatres, cinemas, etc.) where the ambient parameters change due to the presence of many people.
‐ SIDE B simulates the domestic air‐conditioning systems: the window single block air‐conditioner, the portable air‐conditioner and the fixed, split type air‐conditioner.
Through the study of the above systems it is possible to understand the operation of: compressors, condensers and evaporators, fan speed selectors, temperature probes for internal and external air, switches, thermostats, air‐processing units with heating, cooling and humidifying devices, outlet and recirculation valves, temperature/humidity probes, boilers and refrigerating units for the production of hot and cold fluids, electronic units for data recording of temperature and humidity and for the adjustment of the actuators, pumps, etc.
The panel is complete with CAI software.

DL TM33

ProductsCodeCatalogueTender specsManuals SimpleVideo
AIR-CONDITIONING SYSTEM SIMULATORDL TM05
MIXED AIR-CONDITIONING SYSTEM SIMULATORDL TM06
DOMESTIC AIR-CONDITIONING SYSTEM SIMULATORDL TM07
HEAT PUMP AIR-CONDITIONING SYSTEM SIMULATOR DL TM08
AIR CONDITIONING FOR AUTOMOBILESDL AM01
AIR CONDITIONING TRAINERDL TMAC10
INTRODUCTION TO THE AIR CONDITIONING SYSTEMSDL TM33