Single Stage Air Compressor Test Rig

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

Silent Features:

1. We are manufacturing cylinders for industrial applications. Our cylinders can withstand pressure up to 160 Bar. 2. Mobile and self-contained unit, only electrical connections are required. 3. Simplicity of operation and designed for amateur use. 4. Two pressure relief valves are provided in the system. One is provided inside the tank to increase the safety. 5. Hoses can withstand pressure of 188 Bar. 6. Test Pressure : 80 Bar ; Operating Pressure : 40 Bar. 7. Realistic Industrial circuits are demonstrated. 8. Special Bell housing is provided to maintain the Run out between Pump and Motor below 0.020mm. 9. Special fixtures used for pipe bending and ferrule fitting arrangement. 10. Specially designed front mounting plate. 11. System is flushed with very high velocity (4 times the working pressure) byseparate oil which maintains class A cleanliness of system. 12. Lowest pressure drop in the system to avoid overheating. 13. Cylinder are manufactured from precision honed tubes, hardened ground, hard chrome plated piston rods and imported quality seals.

A heavy bench top unit for studying the stress and strain in a thin walled cylinder under internal pressure. A thin walled cylinder is mounted between two support blocks. Internal pistons and seals create oil sealing. A handwheel at one end of the apparatus enables the cylinder end conditions to be adjusted to either open or closed. The internal pressure is adjusted by means of a hydraulic hand pump on the apparatus. An analogue pressure gauge displays the internal pressure whilst a pressure transducer gives feedback to the Data Acquisition Interface and Software supplied. Strain gauges are arranged on the external surface of the cylinder to measure the radial and circumferential surface strain. The strain gauges are at various angles.

The apparatus consists of a forced draught, counter flow type-cooling tower. A blower supplies cooling air. Air enters the tower at the bottom. Hot water is, obtained from a geyser. Hot water is sprayed over the mesh packing through the nozzles and it flows downwards. Evaporative cooling of water occurs due to the current of air and water gets cooled. This student can study the operation of cooling tower and calculate the energy balance.

SPECIFICATION:

Cooling tower, fabricated of M.S. Sheets, 200 X 200 mm. cross section, 1.2m. height with Perspex front. Wire mesh packing is provided in the tower. Geyser – 3 Kw Capacity to provided hot water. Centrifugal blower, 1 HP capacity to force air through the tower. Multichannel Digital Temperature indicator to measure temperature at various points. Rotameter to measure inlet water flow. Measuring tank to measure outlet water flow. Calibrated orifice and water manometer to measure airflow. Arrangement to measure dry and wet bulb temperatures of air at 5 intermediate stations. A technical manual accompanies the unit. The unit Is provided with anticorrosion an attractive color powder coating.

SERVICES REQUIRED:

440V, 32A, AC supply with neutral and earthing connection. Floor space of about 2m. X 1.5m. Water flow of 10 Ht./min. at constant head