Supersonic Electronics, Maharastra

• Drive unit- D.C. Motor 0.25 H.P., 0-1500 RPM 220 V. D.C.

• Speed Control Unit working on single phase.

• Belt and Pulley system to give spindle speed 100 to 500 rpm.

• Governor mechanisms with necessary springs and weights.

 Description:-

                  The apparatus is designed to determine the Stefan Boltzmann constant.

 The apparatus consists of a hemisphere fixed to a Bakelite plate. The outer surface

 of which forms the jacket to heat it.

           Hot water to heat the hemisphere is obtained from a heater in hot water tank which is fixed above the hemisphere. The copper test disc is introduced at the centre of hemisphere. The temperatures of hemisphere and test disc are measured with the help of thermocouples and temperature indicator. A time is provided to measure the temperature of disc at the interval of 5 seconds.

Features:-

Easy understanding of phenomenon of heat transfer by radiation.

Determination of Stefan-Boltzmann constant.

Built – in timer for temperature readings at constant time intervals.

Digital temperature indicator.

Specifications:-

Hemisphere dia-200 mm(approx)

Jacket dis-250 mm (approx)

Test disc size – 20 mm dia x 1.5 mm thickness.

Water tank of sufficient capacity with a 1.5 kw immersion heater

Control Panel comprises of :-

i)          Supply for heater

ii)         Digital temperature indicator 0-200⁰C with 0.1⁰C least count using chormal

     alumel thermocouples, provided with cold junction compensation.

iii)        Built in timer for temperature readings at 5 seconds interval

Experimentation:-

         Determination of Stefan – Boltzmann constant

           Study of effect of hemisphere temperature on the constant.

Introduction :-

                     Engines & turbines are widely used as prime movers.

The pelton wheel turbine using kinetic energy of water is used widely where high head & ample water is  available.                                                                                            

Specification:-

    This consist of  -

a)     Sump tank: -                    1200 × 600 × 600

        Specific speed: -               approx.   19 rpm.

        Net head: -                       45m approx.

       Discharge: -                     approx. 820 lph approx.

       Normal speed: -               750rpm.

       Power :-                            1kw ( 5hp  motor)

       Runner diameter: -           250 mm.

       Number of buckets :-       16

       Brake drum diameter :-   200 mm.

Centrifugal pump  set suitable for supply of water of size

         coupled to 5 hp induction  motor 3 phase 400/400 v. A. C. Supply.

  flowing measuring unit : a 2’ inch orifice meter  with two  pressure gauges on a panel board to measure the differences  of pressure.

 d)    starter switch, piping, foot valve, gate valve.

experimentation :-

Demonstrating the operating characteristics i. E. Power efficiency and torque of a pelton wheel at various speeds.

Determining the performance characteristics and effect of discharge and velocity of impinging water on turbine operation.    

• Duct Size : 250 mm x 250mm x 2m. long (approx.)

• Blower Fan : Driven by 0.5 H.P. (Approx.) 3 phase motor. Air flow 0.28 m/Sec. With butterfly valve inlet to control air flow rate.

• Digital Temperature Indicator : 0-2000 C with 10 C least count, multi channel.

• Steam Generator : compact unit provided with 1.5 Kw. Heater for generating steam. Connected to both sections by insulated piping through hand control valves.

• Control panel consisting of proper switches and valves.

• Sturdy fabricated frame for housing the duct, instrumentation and controls.

• Dry and wet bulb thermometers 1 sets.

• Electrical Heater : finned U Tube air heaters 0.5 Kw. Capacity.

• Dimmerstat : 230 V.A.C. Single phase, 5-10 Amp. Capacity. Common for both sections with selector swithch.

• Energy Meter : 230 V.A.C. Single phase 5-10 Amp. Capacity.

• High pressure Gauge for R-12 Refrigerant.

• Low Pressure Gauge for R-12 Refirigerant.

• Refrigerant flow meter for R-12 Refrigerant.

• Cooling Unit : Comprising of sealed compressor, air cooled condenser, expansion valve and cooling coil in duct.

• 1st section 2/3 Ton
• 2nd section 1/3 Ton

• Compressor : Hermetically sealed Kirloskar Make or equivalent (920 Kcal / Hr rated cooling capacity

• Air cooled Condenser – Suitable for above compressor with suitable Cooling fan.

• Expansion systems

• Evaporator coil : Suitable for above compressor immersed in water tank of stainless steel.

• Electric Heater : For balancing Refrigerating effect produced.

• Rotameter : For liquid refrigerant flow rate

• Refrigerant : Freon 12

• Energy meters for Power measurement of compressor & Heater (Calorimeter)

• Dimmerstat : 230 V.A.C. Single phase for Heater control.

• Pressure gauges 2 Nos. for HP & LP Measurement.

• Temp. Indicators.

• Solenold alve: 230 V Supply : 1 No.

• H. P. / L. P. cutout : to suit compressor pressures.

• Sight Glass : 1No.

• Service Valves : 3 Nos. needle type.

• Ammeter

• Voltmeter

• Thermostat

• Filter / dryer

• Illustrative Instruction Manual.

• The circuit mounted on a board equipped with all controls.

• Air compressor - Double cylinder, Two stage type driven by a 2 hp. three phase motor mounted on air receiver provided with delivery valve.

• Pressure gauges at outlet of the both stages.

• Air tank and orifice with water manometer for air intake measurement.

• Energymeter to measure input power A technical manual accompanies the equipments.

• Digital temperature indicator. Air Compress

• Engine - Four stroke single cylinder water cooled, vertical diesel engine, developing 5 BHP at 1500 rpm.

• Fuel intake measurement arrangement.

• Air intake measurement arrangement.

• Multichannel Digital Temperature indicator to measure the temperature at various points.

• Water circulated exhaust gas calorimeter. The whole unit is mounted on a sturdy frame. A technical manual accompanies the unit.

• Rope brake : Rope wound around water cooled brake drum and spring balance.\

• Electrical : Suitable capacity Generator, and load bank with load measurement. Hydraulic dynamometer can be also supplied instead of rope or Electrical Dynamometer.