Single Stage Air Compressor Test Rig

The apparatus consists of a spiral casing, which houses an impeller. Impeller is driven by a variable speed D.C. motor. Three, interchangeable impellers, viz. Radial forward and Backward curved vanes are provided with the unit. Digital indicators are provided for speed of impeller. A venture provided measures the discharge. Thus students can evaluate the performance of different impellers at various speeds.

SPECIFICATIONS:

1.Blower – Spiral casing with three interchangeable impellers viz. forward, backward and radial vanes. 2.Drive Motor-1 HP DC motor, 3000 RPM with Dimmer control to vary the speed from 300 to 3000 RPM. 3.Digital Speed indicator for speed measurement. 4.Ventura with water manometer to measure air flow. 5.Water manometer to measure discharge pressure. 6.Discharge pipe with flow control valve. 7.A technical manual accompanies the unit.

SERVICES REQUIRED:

1.Floor space of about 2m X 1.5m X 1.5m height. 2.230 V. 5A., 50 Hz, AC Supply.

The test rig comprises of a two-stage air compressor fitted with an air tank with orifice, pressure gauges 9 an energy meter to measure the input & a Temperature indicator measures the temperatures at various points. The compressor is mounted on air receiver along with the motor, and is provided with air relief valve (safety) and a pressure switch. The unit determines volumetric efficiency and isothermal efficiency at various discharge pressures

SPECIFICATIONS:

1.Air compressor – Double cylinder, two-stage type driven by a 2-hp. Three – phase motor mounted on air receiver provided with delivery valve. 2.Air tank and orifice with water manometer for air intake measurement. 3.Pressure gauges at outlet on both stages. 4.Digital temperature indicator. 5.Energy meter to measure input power. 6.A technical manual accompanies the equipments.

SERVICES REQUIRED:

1.Floor space of 2,5 X 1.5m. 2.440 V, 15A, 3ph. AC supply with neutral and earthing connection. 3.A hand tachometer.

AIM To find out dryness fraction of steam by combined separating and throttling calorimeter.

PRODUCT DETAILS

The steam passing out from separating calorimeter may still contain some water vapour , in it . in other words it may not be absolutely dry . again , in a throttling calorimeter steam after passing through the throttle valve must be superheated or at least dry saturated . this limits the extent of dryness fraction that can be reliably measured , depend up on the pressure of steam in the main steam pipe . if a sample of steam, which may be still wet after passing through the throttle valve i.e it will not be superheated . thus under this condition the throttling calorimeter fails to enable us in determining the value of dryness fraction of steam . to overcome this difficulties we make use of separating and throttling calorimeter . first the steam is passed through separating calorimeter where itlosses most of it’s moisture and becomes comparatively drier, it is than passed through the throttling calorimeter where super heating takes place with out changr of total heat . the temperature and pressure of steam after throttling are measured by using a thermometer and manometer respectively.

DESCRIPTION

The set up consist of a separating and throttling calorimeter . a steam generator is provided at the base of the apparatus . a thermostat knob is provided at the front of apparatus to control the temperature inside the steam generator . steam from steam generator is passed from separating calorimeter where most of the water partical get separated from steam and then passed to throttling calorimeter where steam get superheated . after that superheated steam passed through heat exchanger to condense the steam.

SAPARATING CALORIMETER

It consist of two concentric chamber , the inner chamber ,and the outer chamber . which communicates with each other through an opening at the top. As the steam discharge through the metal baskets ,which has a large number of holes , the water partical due to there heavier momentum get separated from the steam and collected in the chamber. The comparatively dry steam in the inner chamber moves up and than down aging through the annular space between the two chambers and enters the throttling calorimeter .

THROTTLING CALORIMETER

It consist a narrow throat . pressure and temperature are measured by manometer and thermometer . the steam after throttling process passed through the heat exchanger and condensate is collected .

UTILITIES REQURIED

1.WATER SUPPLY 3 lit/min (approx) 2.Drain 3.Electric supply : 1phase , 220 V A.C , 2Amp. 4.Steam table for calculation 5.Space required : 1.0 m X 1.0 m

LIST OF EXPERIMENTS

1.Operation of a Single Acting Cylinder 2.Speed Control Of Single Acting Cylinder 3.Operation of a Single Acting Cylinder with And Gate 4.Operation of Pneumatic Motor 5.Speed Control of Pneumatic Motor 6.Operation of D/A Cylinder with 5/3 Way Lever Operated DC Valve 7.Speed Control of D/A Cylinder with Flow Control (Meter In) 8.Speed Control of D/A Cylinder with Flow Control (Meter Out) 9.Speed Control of D/A Cylinder with Flow Control in Forward & Return Stroke 10.Sequencing of Motor & Double Acting Cylinder 11.Sequencing of D/A Cylinder with Single Acting Cylinder 12.Operation of Single Acting Cylinder with 5/2 Way Single Solenoid 13.Operation of Double Acting Cylinder with 5/2 Way Single Solenoid

SALIENT FEATURES

1.Mobile self contained unit. 2.Simplicity of operation and designed for immature use. 3.Industrial components and circuits are demonstrated in the circuit. 4.Pneumatic valves of Shrader / Festo/ SMC or equivalent only. 5.Performance Guarantee of two years for any manufacturing defect. 6.Modular design with fitment of component at any corner of trainer. 7.Specially designed quick coupling.