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WL 201 Fundamentals of humidity measurement Vocational Training Equipment Thermal Lab Equipment
Description
The measurement of air humidity plays an important role in many branches of industry, e.g. during drying or in the air conditioning of buildings and vehicles. There are different measuring methods to determine humidity.
The trainer WL 201 enables the measurement of air humidity with four different instruments which can be directly compared to each other: two different hygrometers, a capacitive hygrometer and a psychrometer.
Psychrometers operate based on the principle of evaporation cooling and compare the ambient temperature with the wet bulb temperature to determine the humidity. Hygrometers utilise the property of specific fibres, e.g. hair, to expand with increasing air humidity. In the capacitive sensor the dielectricity constant of a layer and with it its capacity changes due to the water molecules absorbed.
The core element of the trainer is a climatic chamber with transparent door. This chamber can be humidified and dehumidified and contains the four instruments. A Peltier cooling element is used for dehumidification. An ultrasonic atomiser is used for humidification. To circulate the air and ensure good mixing a fan is used.
Specification
different measuring methods for measuring humidity
climatic chamber with adjustable humidity and transparent door
humidification via ultrasonic atomiser
dehumidification via Peltier cooling element
fan for air recirculation
2 mechanical instruments: psychrometer, hair hygrometer
2 electronic instruments: capacitive sensor, hygrometer with synthetic fibre and combined temperature sensor
Technical data
Humidifier
ultrasonic atomiser
power consumption: 21,6W
low water cut-off
Dehumidifier
Peltier element
cooling capacity: 56,6W (50°C ambient temperature)
cooling surface: 1600mm2
Hair hygrometer with deflective needle
measuring range: 0…100% r. h.
Hygrometer with synthetic fibre
output voltage: 0…10V
measuring ranges: 0…100% r. h. / -30…80°C
Capacitive sensor with digital display
output voltage: 0…10V
measuring range: 1…100% r. h.
Psychrometer with thermometer
measuring range: -10…60°C, graduation: 0,5°C
230V, 50Hz, 1 phase
120V, 60Hz, 1 phase; 230V, 60Hz, 1 phase
UL/CSA optional
Dimensions and weight
LxWxH: 1400x800x1630mm
Weight: approx. 110kg
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Model:SR3003
investigation of the pressure losses of flow through pipes
– measurement of the pressure differential on different pipe sections
– influence of various pipe diameters
– influence of different materials and surface roughness
– effect of the flow velocity
– comparison between experiment and theory
Specification
[1] investigation of friction-induced pressure losses in flow through pipes
[2] pipe elements are commercially standard components in heating and sanitary engineering
[3] clear panel mounted on a sturdy, movable frame
[4] four measuring sections with different pipe crosssections and materials
[5] pipe sections can be selected via ball valves
[6] water connections made using quick-release couplings in the inflow and return
[7] flow can be adjusted via valves
[8] flow measurement using rotameter
[9] differential pressure measurement via differential pressure meter with display
Technical Data
Pipe sections measuring length: 1000mm
– pipe section 1: transparent plastic, diameter: 20×1,5mm
– pipe section 2: steel, diameter: 1/2″
– pipe section 3: copper, diameter: 18x1mm
– pipe section 4: copper, diameter: 15x1mm
Differential pressure meter
Measuring ranges- flow rate: 150…1600L/h- differential pressure: -350mbar…350mbar
Dimensions and Weight LxWxH: 1650x700x1850mm Weight: approx. 92kg
Required for Operation
Water connection: 1500L/h, drainFour way mixing valve training panel Educational Equipment Teaching Equipment
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1 Product Overview
1.1 Profile
This product is an extensible educational experiment equipment for students to observe the heating, cooling and air movement of the device during operation. Students can observe the mixing of air and conduct tests to monitor temperature and air pressure. Grasp its control principle and control method, cultivate students’ corresponding knowledge and skills, suitable for higher vocational schools, engineering university, secondary vocational school and technical school related professional teaching and skills training evaluation.
1.2 Feature
(1) The training platform adopts an aluminum column frame structure with a universal wheel at the bottom for flexible movement. The desktop uses a 25mm thick high-density substrate, and the surface is treated with high-temperature and high-pressure fire-resistant panels. The structure is firm and beautiful. The instrument and power supply are integrated and installed, which is easy to use and not easily damaged.
(2) The training platform has a good safety protection system.
2 Technical specifications
(1) Input Power: AC220V±10% 60Hz
(2) Fan: Supply voltage: AC220V/50Hz Power: 1.5kW; Maximum flow rate: 2.160m3/h
(3) Overall dimensions: 2000mm x 750mm x 2100mm
(4) Overall capacity: <2.5KVA
(5) Weight: <100kg
(6) Working conditions: Ambient temperature -10°C to +40°C Relative humidity <85% (25°C)
3 Product introduction
3.1 Power control panel
(1)The power control panel adopts an aluminum alloy frame and a closed box structure, which is integrated with the placement rack below.
(2)Configured with circuit breaker, power indicator, temperature adjustment knob, thermometer, power socket, differential pressure gauge, thermostat and intelligent electrical parameter measuring instrument
(3)The power input is controlled by the leakage breaker and the emergency stop control button is provided. In case of emergency, you press emergency stop button is so as to cut off the power.
3.2 Training workbench
(1)Training workbench:
The training table is supported by aluminum pillars, and the bottom universal wheel has a brake that can be moved and positioned flexibly. The desktop uses a 25mm thick high-density substrate, and the surface is treated with high-temperature and high-pressure fire-resistant panels. The structure is firm and beautiful.
(2) Heat exchange systemEnergy Efficiency in Refrigeration Systems Refrigerator Training Equipment
SR2022 Energy Efficiency in Refrigeration Systems Refrigerator Training Equipment
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Learning Objectives / Experiments
– Variables affecting energy efficiency
* controller parameters
* refrigerant supercooling
– Interconnected operation of compressors
– Operation of a multicompressor controller
– Methods for returning oil in a multicompressor refrigeration system
– Representation of the thermodynamic cycle in the log p-h diagramSpecification
[1] Refrigeration system in multicompressor operation to investigate energy efficiency
[2] Refrigeration circuit with 3 compressors connected in parallel, condenser, thermostatic expansion valve and coaxial coil heat exchanger as evaporator
[3] Heat exchanger for refrigerant supercooling can be added via valves
[4] Glycol-water circuit includes pump and tank with heater serving as cooling load at the evaporator
[5] Multicompressor controller for the parallel operation of the compressors
[6] Separation of oil from the refrigerant on the delivery side and return to the intake side of the compressors
[7] Fan at the condenser with adjustable speed
[8] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista
[9] Refrigerant R134a, CFC-free
Technical Data
3 compressors
– refrigeration capacity: each 1584W at -10°C/55°C
– power consumption: each 1156W at -10°C/55°C
Condenser with fan
– capacity: 4100W
– air flow: 1250m³/h
Coaxial coil heat exchanger capacity
– 4kW at ΔT=9K; 0,6m³/h glycol-water mixture
Glycol-water mixture pump
– max. flow rate: 5m³/h
– max. head: 6m
Heater power: 3kW
Tank
– glycol-water mixture: 23L
– refrigeration circuit receiver: 5,8L
Measuring ranges
– temperature: 4x 0…100°C, 4x -100°C…100°C
– pressure: 1x -1…9bar, 1x -1…24bar
– flow rate: 1x 1..25L/min
– compressor power: 0…4995W
Dimensions and Weight
l x w x h: 1800x700x1900mm
Weight: approx. 300kg
Connections
400V, 50/60Hz, 3 phaseslosses in a pipe system Vocational Training Equipment Educational Equipment
SR3005 losses in a pipe system Vocational Training Equipment Educational Equipment
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Model:SR3005
Learning Objectives / Experiments
– pressure curve in a closed pipe system with circulation pump
– influence of pipe diameter, flow velocity, change in
cross-section and pipe fittings on the pressure losses
– determination of pump characteristics, system characteristics and the operating point
Specification
[1] investigation of the pressure losses at contractions, pipe angles, pipe bends, valves and fittings and pipe elements of different diameter
[2] pipe elements are commercially standard components in heating and sanitary engineering
[3] clear panel mounted on a sturdy, movable frame
[4] closed water circuit with pump and tank
[5] integrated bleed valve on manometer and in the pipe section
[6] flow measurement using rotameter
[7] measurement of the pressure distribution at
13 pressure measuring points, display with 13 tube manometers
Technical Data
Pump – 3 stages – max. flow rate: 4,5m³/h – max. head: 6m
Tank: approx. 5L
Measuring range – flow rate: 100…1000L/h – pressure: 1600mmWC
Dimensions and Weight LxWxH: 1900x700x2020mm Weight: approx. 140kg
Required for Operation
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Specification
Training panel for investigating the pressure losses in pipe fittings such as elbows and bends
4different measuring sections, measured length of each section 2300mm, 10 elbows/bends
Pressure measurement with annular chambers with electronic differential pressure gauge
Flow rate measurement with Rota meter
Hose connections made using quick action coupling
Water feed via pressure reducer
Cold water connection
Differential pressure gauge with bleed – measuring range: 0…2000mbar – supply: 9V, battery-operated
Rota meter: measuring range 150…1600ltr/h
Outlet pressure at pressure reducer: 0.5…2bar
Pipe sections: measured length: 2300mm – Pipe section 1: steel, bend
1/2″, 90° bend – Pipe section 3: copper 18x1mm, 90° elbow – Pipe section 4: copper 18x1mm, 90° bend
Pipe and Fittings
7mm bore test section
13.6mm bore test section
13.6mm bore test section with four bends
13.6mm bore test section with four elbows
13.6mm bore test section with ball valve
13.6mm bore test section with angle seated valve
Expeirmental Capabilities
Determination of pressure drop across various pipes and fittings at differnet flow rates
Flow rate/diameter relationship determination for flid flow in pipes
Estimation of loss coefficient (K) for various pipes, pipe fitting and valve settings
Friction Factor determination for fluid flow in smooth pipes
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ZF1115A Trainer for Various Heat Exchangers Thermal Lab Equipment Educational Equipment
Specification
[1] examination and comparison of various heat exchanger types
[2] five different types of heat exchangers included in the scope of delivery
[3] finned heat exchanger with fan
[4] operating mode (parallel flow or counter flow) selectable via valves
[5] flow rates adjustable via valves
[6] electromagnetic flow meter
[7] digital displays for temperature, pressure differences and flow rate
[8] hot & cold water benches available for
independent operation
[9] water/steam heat exchanger unit and electrical steam
Generator available for further experiments
[10] software for data acquisition via USB under Windows Vista or
Windows 7
Technical Data
Plate heat exchanger, 10 plates
– heat transfer surface area: approx. 0,26m²
– capacity: 15kW
Tubular heat exchanger
– heat transfer surface area: 0,1m²
– heat transfer surface area (coil): 0,17m²
Shell and tube heat exchanger
– capacity: 13kW
Finned cross-flow heat exchanger
– heat transfer surface area: approx. 2,8m²
– max. flow rate fan: 780m³/h
– max. pressure difference fan: 430Pa
Jacketed vessel with stirrer
– heat transfer surface area (vessel): 0,16m²
– heat transfer surface area (coil): 0,17m²
Measuring ranges
– differential pressure air: 0…10mbar
– differential pressure water: 0…1000mbar
– flow rate: 0…3m³/h
– temperature: 0…100°C
Dimensions and Weight
LxWxH: 2010x800x1760mm
Weight: approx. 300kgBrand: Shouldshine
Model:ZF1115AThermal Expansion Trainer Panel Vocational Training Equipment Teaching Equipment
ZF1116A Thermal Expansion Trainer Panel Vocational Training Equipment Teaching Equipment
Brand: Shouldshine
Model:ZF1116A
Specification
Training panel for investigating the thermal expansion of different pipe sections
• Length of each pipe section 1200mm
• Pipe sections can be selected by ball valves
• Water connections made using quick action hose couplings
• Operation with hot and cold water supplies
• Adjustment of the water temperature using mixing battery with thermocouple
• Temperature measurement using battery-operated digital thermometer
• Force measuring device to determine the expansion force
• Pipe section length: 1000mm
• Nominal diameters: – PVC, PE, Cu: DN15 – Cu: DN8 – Steel: 1/2″
• Mixing battery connection: 1/2″
• Force measuring device: – spring rate per spring: 78N/mm – total spring rate c: 156N/mm
