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Products | Thermodynamics, Heating and Sanitary Systems | Fundamentals of Thermodynamics | WL 210

WL 210

Flow Boiling Demonstration

Technical Description

The process of evaporation in heated pipes that occurs in water-tube boilers can be demonstrated. The different phases that appear during evaporation in the pipe can be clearly seen. The double-wall glass evaporation pipe allows the evaporation process to be observed closely. Hot water flows through the outer pipe and evaporates the medium in the inner pipe. The non-toxic liquid used starts to evaporate at 40 to 50°C. Low system pressures can be generated with the built-in water-jet vacuum pump. The pipe systems are clearly laid out on a metal panel. The hot water circuit consists of an expansion vessel, a circulating pump and heater. An evaporation pipe, vapour collector, water-cooled condenser and return pipe form the evaporation circuit.
A supply of water is necessary for operation.

Learning Objectives / Experiments

- Effect of
+ flow rate

+ temperature

+ pressure

on the evaporation process

Observation of typical forms of evaporation such as:
- Single phase liquid flow
- Bubbly flow
- Slug flow
- Annular flow
- Film boiling
- Drop flow (mist)
- Single phase vapour flow

Features

* Demonstration of evaporation in heated pipes₁

* Double-wall pipe evaporator made of glass₁
* Flexible in use due to installation on a mobile
laboratory trolley₁
* Operation with harmless, special low boiling point
liquid₁
* Complete experiment instructions

Alternative products

WL 220 -- Boiling Heat Transfer Unit

Specification

[1] Experimental set-up for demonstrating evaporation in a water pipe evaporator
[2] Laboratory trolley with strong metal sheet, lxwxh 1000x600x1950mm
[3] Evaporation pipe made of double-wall glass, heated with hot water, evaporation in inner pipe, heating in the outer sheath
[4] Heater 2kW, temperature range 5...80°C
[5] Circulating pump, 3 stages, 90W
[6] Water jet vacuum pump for generating partial vacuum
[7] CFC free evaporation liquid Solkatherm SES36

[8] 230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase

Technical Data

Heater circuit:

- power rating: 2kW

- temperature range: 5...80°C
Thermometer: 0...100°C
Circulating pump:

- max. flow rate: 3m³/h

- max. head 5m
Water jet vacuum pump:

- rqd. water pressure 0.5bar

- water consumption: 3ltr/min

- final pressure: 12mbar
Tube evaporator:

- length 1200mm,

- id: 13.6mm

- od: 24mm
Quantity of liquid for evaporation: 0.5ltr
Pressure range: -1.0...1.5bar relative
Condenser: copper coil

Dimensions and Weight

l x w x h : 1000 x 600 x 1950 mm
Weight : approx. 60 kg

Connections

230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase
Cooling water: required: 0.5bar, 180ltr/h

Scope of Delivery

1 experimental set-up, fully assembled

1 instruction manual

Order Details

060.21000 WL 210 Flow Boiling Demonstration