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Air conditioning system

Super User 04 ارديبهشت 1397

Air conditioning system

Description:

Air conditioning technology is a key topic in building services engineering. For this reason air conditioning technology plays an important role during the training of skilled workers and engineers. This experimental setup represents a complete air conditioning system with an air duct and a climatic chamber. The main components of the air conditioning system are the air cooler with condensing unit, fan, steam humidifier and air heater. Three motorised ventilation flaps control the air distribution in the air conditioning system. The climatic chamber is equipped with two different heat sources (wet and dry). Temperature and relative humidity are measured at relevant points in the air duct and displayed digitally. For the refrigeration circuit two manometers with integrated temperature scale and a flow meter provide all relevant measurements.

 

Experimental and practical Possibilities:

 air conditioning system and its components

mixing different air flows

representation in the h-x diagram for humid air

                humidification and dehumidification

                heating and cooling

representation of the circuit in the log p-h diagram

effect of a cooling load (dry and wet)

recirculating and outer air operation In conjunction

 

Device component:

refrigerant flow meter

servomotor

ventilation flap

refrigerant manometer

condensing unit

climatic chamber

air duct with temperature/ humidity sensor

fan

air heater

displays and controls

humidifier

air cooler

 

 

Characteristics of Nozzles

Super User 04 ارديبهشت 1397

Characteristics of Nozzles

Description:

Nozzles are extremely important components in a wide variety of engineering applications, for instance: turbines, jet propulsion, rockets and eductors, etc. The Nozzle Pressure Distribution Unit has been designed to demonstrate the phenomena associated to fluxes through nozzles and to allow the students investigating quickly the pressure distribution in them.

This unit offers two experiment layouts for nozzles, in which either the occurring action force or reaction force of the fluid is considered. Characteristics such as flow velocity and nozzle efficiency are measured. In addition, the "choking effect" is demonstrated, where the mass flow stops increasing upon reaching the critical pressure ratio. Air is used as a compressible fluid. In the first experiment layout to determine the reaction force, a nozzle is inserted into the force measuring device. The force measuring device consists of a bending beam, whose deformation is measured electronically. The air pressure upstream and downstream of the nozzle can be adjusted. Compressed air flows through the nozzle and the occurring reaction force (thrust) of the fluid is measured. In the second experiment layout, the baffle plate is inserted into the force measuring device and the nozzle is positioned above the baffle plate. The position of the nozzle is adjustable, so that the distance between the nozzle and the baffle plate can be varied. The flow at the nozzle outlet impacts against the baffle plate and the action force (impact force) of the fluid is detected by the deformation of the bending beam. Pressures and mass flow are also detected in addition to the force. The temperatures are also measured, in order to determine the mass flow precisely. Four convergent-divergent and one convergent nozzle as well as a baffle plate are available for experiments.

 

Experimental and practical Possibilities:

Study of the flow in a convergent-divergent nozzle

determining the critical pressure ratio

demonstration of the "choking effect"

determining flow velocity in the narrowest cross section

measurement of the reaction or action force of the flowing fluid

determine nozzle efficiency by thrust

 

Device component:

Manometer for pressure measuring

Thermometer

Pressure regulator

Flow meter for air flow measuring

Convergent and divergent nozzles

Control valve

Vapour-compression refrigeration unit

Super User 04 ارديبهشت 1397

Vapour-compression refrigeration unit

Description:

The purpose of a refrigeration system is the cooling of materials and products, e.g. to protect food from spoiling. Cooling can be described as a process in which heat is removed from the environment. A commonly used refrigeration system is the so-called compression refrigeration system. In this system refrigerant flows through four main elements: compressor, condenser, expansion element and evaporator. The refrigeration system uses the fact that the refrigerant has a low boiling point at low pressure. This means that evaporation takes place on the low pressure side. During the evaporation of the refrigerant heat is removed from the environment and it is cooled. The condensation takes place on the high pressure side after the evaporator. Here the heat is discharged into the environment. If not the cooling effect but the discharged heat is used, this is called a heat pump. Evaporator and condenser have been designed as a pipe coil with each end immersed in a water-filled tank. The water simulates the environment. A thermostatic expansion valve serves as expansion element. Two manometers indicate the two system pressures on the high and low pressure sides. On an additional scale on the manometer the evaporation temperature of the refrigerant is indicated. Two thermometers measure the temperature of the water in the tanks. This allows for calculations of the amount of heat removed from the environment (evaporator, cold water) and added to the environment

 

Experimental and practical Possibilities:

fundamentals of a compression refrigeration circuit

 key components of a refrigeration system (compressor, evaporator, condenser, expansion element)

operation of a refrigeration system / heat pump

developing a basic understanding of the thermodynamic cycle

P-h diagram

Comparison between ideal and experimental refrigerant cycle

 

Device component:

Hermotic compressor

Condenser

Evaporator

Expansion valve

Thermometer and manometer

Rotameter

Water tanks

Wattmeter

 

 

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کلیه ی مطالب برای شرکت پژواک پژوه صنعت محفوظ می باشد.

تماس و پشتیبانی

  • آدرس : شهرک صنعتی شمس آباد | بلوار دشتستان | گل افشان ۴  | پلاک ۱۳
  • ایمیل : pps_eng@yahoo.com
  • تلفن : 56236055-021
  • همراه: 09126218213

 

 

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