Computerized Refrigeration Circuit with Variable Load

TECHNICAL SPECIFICATION

The data acquisition System includes the following sensors: 1)8 temperatures sensors connected to the supervision system at:

a)Expansion valve inlet and Outlet b)Compressor inlet and Outlet c)Condenser inlet outlet d)Evaporator Inlet and outlet 2)2 pressure sensors a)Low pressure (inlet compressor) b)High pressure (outlet compressor) 3)1 electrical power consumption of the compressor 4)1 Electrical power consumption of load The software is divided in two parts. The first part is the schematic diagram with the display of all the data, the second is the graph (plot the data in real time) Total Equipment is skid mounted in SS 40 x40 Frame Structure with Castor wheels.

EXPERIMENTS

Design and components of a refrigeration system

* compressor

* condenser

* thermostatic expansion valve

* evaporator

* pressure switch

representation of the thermodynamic cycle in the log p-h diagram

determination of important characteristic variables

* coefficient of performance

* refrigeration capacity

* compressor work

operating behaviour under load

SPECIFICATION

[1] investigation of a refrigeration circuit with water circuit as load

[2] refrigeration circuit with compressor, condenser with fan, thermostatic expansion valve and coaxial coil heat exchanger as evaporator

[3] water circuit with pump, tank with heater as cooling load at the evaporator

[4] heater with controller to adjust the tank temperature

[5] record of all relevant measured values and display directly at the location of measurement

[6] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista

All wetted parts also made of SS-304 Compressor Refrigeration capacity: approx. 479W at 7,2/54,4°C

power consumption: 168W at 7,2/54,4°C

Evaporator Refrigerant volume: 0,4L

RECIRCULATING TYPE A.C. TRAINER

TECHNICAL SPECIFICATION

The unit features an air-cooled condenser unit connected to an evaporator located in an air duct. The air duct contains relative humidity and temperature sensors on both sides of the evaporator. A small fan provides airflow down the duct and can be manually adjusted.

The refrigeration circuit features high and low pressure gauges, a pressure switch, sight glass, filter dryer and TEV valve. The circuit also includes pressure transducers that connect to the instrumentation.

Sensors record the air temperature and air humidity before and after each stage as well as the pressures and temperatures of the refrigerant. The flow rate of the refrigerant is determined by means of the pressure measurement. The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC via USB. The data acquisition software is included.

FEATURES

Learn to use Psychometric charts

Determine enthalpy change in the airflow

Learn to use a Pressure-Enthalpy chart

Determine superheat and sub-cooling

Determine Coefficient of Performance (COP)

Determine isentropic and non-isentropic efficiencies of compression stage

Investigate the effect of air flow rate on COP

Complete Ducting made of PC or Acrylic to visualise and identify the components in working Mixing dampers: Mixing dampers with electrical actuator and position indication. The system includes 3 dampers : outdoor air, mixing air and exhaust air Total Equipment is skid mounted in SS 40 x40 Frame Structure with Castor wheels. All wetted parts also made of SS-304 Total Equipment is skid mounted in SS 40 x40 Frame Structure with Castor wheels. All wetted parts also made of SS-304 Compressor: - Hermetically sealed compressor having cooling capacity of (1 ton) Emerson or Equivalent.

Condenser: Air cooled condenser made up of copper pipe & Aluminum fins of matching capacity with fan cooling. FHP fan motor with fan blade is provided. Storage room: - 100 mm X 800 mm X 1000 mm Storage room with double wall insulated with suitable small door. Evaporator: - Air passed Evaporator made of copper pipe and aluminums fins of matching capacity with fan cooling. Expansion device:

Capillary Tube Diameter: suitable; Material: copper Rota meter: For measuring flow rate of liquid refrigerant. Capacity: 0 to 100 LPH. Pressure Gauges: 0 to 500 PSI (R-22); Compound Gauge -30 to 150 PSI (R-22) HP/LP cut-out: Danfoss or equivalent.

Refrigerants: Primary R-22 gas. Service valve: 1 no. Brass type. Filter / Drier: 1 nos. Danfoss or equivalent make. Thermostat: Ranco make or equivalent Single phase 230 V AC, 15 Amp supply Touch screen based Fully automatic system with password protection Data acquisition Would be Remotely operated by Smart phone, Tablets, PC, laptops via Ethernet and Wi-fi Would be equipped with all safety protections Flow visualization Would be available in the DAQ System Would be equipped with both manual and auto operation Power consumption of individual system, all sensors’ data Would be display and logged automatically System Would have software for operating, data logging, processing and data displaying Performance variables (e.g., Heating/Cooling COP, Heating / Cooling load etc..) Would be automatically calculated and displayed and Would be stored in pen drive also along with PC

SMOKE POINT APPARATUS

DESCRIPTION

It is an indicator of the combustion qualities of Aviation Turbine Fuels and Kerosene. The fuel sample will be burned in the smoke point lamp and the maximum flame height obtainable without smoking is measured.

TECHNICAL SPECIFICATION

1. Equipment Would comply with ASTM D1322, IP 57, IS:1448 (P-31)

2. Item would have the following features;

• A brass lamp body with chimney

• 0?50mm black glass scale with white markings

• Brass plated door with curved glass window

• A candle socket

• Plated brass candle with wick tube & air vent

• A mirror can be attached to the chimney to aid smoke detection.

• Mounted on a cast iron base with aluminium support rod.

OPTIONAL ACCESSORIES

Spare candle

Spare wick

Instruction Manual will be provided along with the apparatus.

COPPER CUM SILVER CORROSION BATH WITH ALL ACCESSORIES-DIGITAL MODEL

DESCRIPTION

The Copper Strip Tarnish Test assesses the relative degree of corrosivity of petroleum products, including aviation fuels, automotive gasoline, natural gasoline, solvents, kerosene, diesel fuel, distillate fuel oil, lubricating oil and other products. This bath also tests the corrosiveness of aviation turbine fuels towards silver as per IP 227.

A polished copper strip/Silver strip is immersed in fuel sample at elevated temperature. After the test period, the strip is examined for evidence of corrosion and a classification number from 1-4 is assigned, based on a comparison with the ASTM Corrosion Standards.

TECHNICAL SPECIFICATION

1. Equipment Would comply with ASTM D130, IP 227

2. Equipment would have the following features/components;

? Equipment double walled water bath

? Inner chamber is made of mirror polished Stainless steel 304 grade material for corrosion resistance effect.

? Exterior body fabricated from Mild steel material, which is powder coated in attractive shades

? Gap between inner chamber and exterior body would be supplied with minimum of 65 mm . thick insulation to prevent thermal heat loss.

? Temperature of the bath e controlled by Micro Processor Based Auto Tune Digital PID Temperature Controller Cum Indicator.

? Immersion Heaters would be of stainless steel material which are fitted within the chamber

? Heaters will be designed such that they have Long life and high safety zone

? Stirring would be accompanied by stainless steel stirrer with peddles, which will cause the uniform temperature distribution throughout the chamber.

? Grease seal for reduced condensation losses in stirrer

? Temperature controller would be isolated from vapours to prevent any damage to the electronic circuit.

? The bath would have six test stations, each supplied with a lid and hook for suspending either a copper corrosion test vessel (copper corrosion test) or a test tube support (silver corrosion test).

? A test tube would hold up to three test tubes at a time for silver corrosion test.

? Any combination of copper corrosion vessels and test tube supports would be compatible to be used to conduct the experiments.

3. Technical Specifications:

? Operating Temperature: 5 °C above ambient to 150 °C .

? Temperature Resolution : 0.1 °C .

? Temperature control

? Accuracy : ± 0.5 °C at 50 °C & 100 °C .

? Temperature sensor : Probe type Pt 100 Sensor .

? Bath Media : Water or Oil

? Safety device : Over Temperature Alarm system to warn the operator

4. The equipment supplied with:

Inspection tube for copper corrosion test app-ASTM D130 – 2Nos

5. Accessories will be supplied:

• Copper Corrosion test vessel, stainless steel with O rings, screw type cap, for use up to 100 psi. - 1No

• ASTM COLOR CHART FOR SILVER STRIP CORROSION TEST - IP 227, ASTM D3241 compliance – 1No

• ASTM COLOR CHART - FOR COPPER STRIP CORROSION TEST - ASTM D130 compliance - 1No

• Copper Strips, 3" x 0.5" x 12 SWG, (Pack of 3)

• SILVER TEST STRIPS, 99.9% purity (pack of 5)

• GLASS SUPPORT CRADLE, to accept silver test strip

• Cold finger Condenser for silver strip test as per IP 227 -1No

• Bench top vice to hold up to 5 strips for polishing -1No

• Test Tubes of 25 mm diameter & height 150 mm pack of 10

• Test Tube stand, to hold 3 test tubes of 25 mm diameter & height 150 mm. -1No

POTENTIOMETRIC TITRATION APPARATUS

DESCRIPTION

A fully Solid State Circuitry is incorporated, ensuring accurate reproducible results. The equipment is compact having a built-in magnetic stirrer with speed control and titration stand. The indicator is a digital display with range - 900 to + 900 millivolts. Since, the millivolts can be read directly on the display, the operation is simple and quick.

TECHNICAL SPECIFICATION

1. Equipment Would comply with ASTM D2896, ASTM D3242

2. Item would come with following features.

? Microcontroller Based Titrator suitable for Aaqueous/Non-Aqueous and Red-Ox titrations.

? Suitable for TAN /TBN titrations as per various ASTM Methods.

? Built-in Magnetic Stirrer.

? Valve less Dispenser suitable to handle various titrants.

? Titrant would be change within no time.

? Cumbersome Piston Burette and non-return valve system is to be eliminated for ease of operation.

? No Refilling is necessary after every titration.

? Several titrations would be carried out uninterruptedly.

? Eliminates the need of separate Dispenser for different titrants.

? Direct Volume Addition facility to reduce titration time.

? Ability to Step Volume Dosing for Routine Titrations.

? Speed Mode would be there with variable titration speed.

? Addition slows down automatically as the End Point approaches.

? Various Modes such as Blank, Normality, and Sample Test.

? Supports two methods for Normality. Standard Sample and Volumetric.

? Average Normality Calculation facility.

? Single, Double and Multi Peak Titration facility.

? Up to 10 Peaks would be determined.

? Easy-to-read Large Graphic Display.

? On line messages for user friendly operations.

? On line information of the Titration Status.

? QWERTY Keyboard (PC Keyboard) Interface for easy alphanumeric data entry.

? Alphanumeric data entry for various Titration Parameters.

? Error Messages to avoid incorrect data entry.

? Printout as per GLP requirements.

? Test method storage facility up to 100 test methods.

? Password protected data.

? RS 232 Interface for PC to download the data.

? Graphical Representation in different formats.

? Statistical calculations such as Average, SD, RSD.

? ‘SEARCH’ and ‘REPORT facilities.

3. Technical Specifications

•Stirrer : Built-in magnetic.

•Dispenser : Valve-less pump

•Display : LCD backlit graphic display .

•Keyboard : 4 x 4 feather touch key board and QWERTY keyboard .

•Range : 0 mV to + 4000 Mv .

•Dispensing resolution : 0.01 ml .

•Memory Storage : Non-volatile

•User programmable : 100 test methods

•PC Interface

•Balance interface

4. Standard Accessories will be supplied:

• Glass Electrode: 01 Nos. Minimum

• Calomel Reference Electrode: 01 Nos. Minimum

• Platinum Electrode :02 Nos.

• Ag-Ag Cl Reference Electrode: 01 No.

Instruction manual will be provided along with the apparatus.

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POTENTIOMETRIC TITRATION APPARATUS COPPER CUM SILVER CORROSION BATH WITH ALL ACCESSORIES-DIGITAL MODEL SMOKE POINT APPARATUS RECIRCULATING TYPE A.C. TRAINER Computerized Refrigeration Circuit with Variable Load