- Description
- Inquiry
ZT0021 Cross-Flow Heat Exchanger Didactic Equipment Heat Transfer Laboratory Equipment
I. Product content
1 Product overview
1.1 Overview
The ZT0021 cross-flow heat exchanger experimental platform is a training and teaching device used in the laboratory to study the conditions of forced convection and natural convection through a single tube and a cross-row tube bundle. The center of the experimental platform is a vertical air duct, the test sample is inserted into it, and the heating element includes a single tube and a fork-row tube bundle. The axial flow fan is located at the bottom of the air duct, and guides the air to flow through the heating element through the air duct and absorb heat to achieve the purpose of forced convection heat exchange.
1.2 Features
The ZT0021 cross-flow heat exchanger test bench is arranged in the test section to achieve laboratory simulation of different working conditions such as single tube and cross-row tube bundle;
The flow and velocity of the fan at the bottom of the air duct can be continuously and steadily adjusted to guide the air to simulate forced convection conditions;
Transient data during the change of the workbench is directly displayed on the display of the control box in digital form;
Various physical data of the workbench change process can also be transmitted to the PC through the USB interface for further processing;
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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.
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Brand: ShouldShine
Model: SR2022
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
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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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Model:SR3002
Learning Objectives / Experiments
– thermal expansion of different materials such as PVC, PE, copper and steel
– determination of thermal expansion coefficients and the expansion force
– measurement of pipe elongation
– effect of varying pipe diameter
– expansion compensator
Specification
[1] investigating the thermal expansion of different pipe sections
[2] pipe sections can be selected by ball valves
[3] water connections made using quick-release couplings
[4] operation with hot and cold water supplies
[5] adjustment of the water temperature using mixing battery with thermocouple
[6] temperature measurement using battery-operated digital thermometer
[7] force measuring device to determine the expansion force
Technical Data
Pipe section length: 1000mm
Nominal diameters- PVC, PE, Cu: – Cu: – Steel: 1/2″
Mixing battery connection: 1/2″
Force measuring device
– spring rate per spring: 78N/mm
– total spring rate c: 156N/mm
Measuring range
– temperature: -50…90°C
Dimensions and Weight
LxWxH: 1650x700x1850mm
Weight: approx. 100kg
Required for Operation
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Description
The panel contains a pipe system with four radiators. Each radiator has an air bleed, a thermostatic valve and lockshield valve.
Rotameters indicate the flow rate through each individual radiator and for the entire system. Connections for cooling water make it possible to dissipate the heat supplied by the hot water. All water connections are made using quick-release couplings.
Training panel on heating systems and plumbing
•4 radiators with thermostatic valve, air bleed and adjustable lock shield valve
• 5 Rota meters
• 2 water connections for boiler DN15
• 2 cooling water connections DN15
• Water connections made using quick action hose couplings
• Hot and cold water supply
•Rota meters: 1x 1000ltr/h 4x 300ltr/h
• Radiator: plate heat exchanger with 10 plates, capacity: 3kW
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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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I.Production profile
The key feature of plate heat exchangers is their compact design, in which optimum use is made of all of the material for heat transfer. The pressed in profile on the plates creates narrow flow channels, in which significant turbulence occurs. The turbulent flow allows effective heat transfer even with low flow rates and also has a self-cleaning effect. Plate heat exchangers are used in the food industry, offshore technology, refrigeration and domestic engineering.
II.Equipment feature
The SR1158E Plate Heat Exchanger is part of a series of units enabling experiments to be performed on different heat exchanger types. The experimental unit is ideally suited for investigating the functioning and behaviour of a plate heat exchanger in operation.
The plate heat exchanger is made up of profiled plates with water flowing through the spaces between them. The plates are soldered in such a way that two separate flow channels are formed. These are one “cold” and one “hot” flow channel, in an alternating arrangement. Part of the thermal energy of the hot water is transferred to the cold water. Valves on the supply unit are used to adjust the flow rates of hot and cold water. The supply hose can be reconnected using quick-release couplings, allowing the flow direction to be reversed. This allows parallel flow or counter flow operationspecification
[1] plate heat exchanger for connection
[2] hot and cold water supply
[3] parallel flow and counterflow operation possible
[4] six soldered plates
[5] recording of temperature
Technical Data
6 plates, stainless steel
Heat transfer area: 480cm²
Dimensions and Weight
LxWxH: 400x230x85mm
Weight: approx. 3kg
Brand: ShouldShine
Model: SR1158E
