Flow Boiling Demonstration (TH-3120)

The Flow Boiling Demonstration (TH-3120) is designed to demonstrate the process of evaporation in heated pipes as occurs in water-tube boilers. The different phases that appear during evaporation in the pipe can be clearly observed. The double-wall glass evaporation pipe allows close observation of the evaporation process. 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 using the built-in water jet 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 a heater. An evaporation pipe, vapour collector, water-cooled condenser, and return pipe form the evaporation circuit.

Features

• Demonstrates evaporation in heated pipes
• Clear observation of different phases during evaporation
• Double-wall glass evaporation pipe for close process observation
• Hot water flows through the outer pipe and evaporates the medium in the inner pipe
• Non-toxic liquid starts to evaporate at 40 to 50°C
• Low system pressures generated using the built-in water jet pump
• Pipe systems mounted and clearly laid out on a metal panel
• Hot water circuit includes expansion vessel, circulating pump, and heater
• Evaporation circuit includes evaporation pipe, vapour collector, water-cooled condenser, and return pipe

Educational Objectives / Learning Outcomes

• Observation of typical forms of evaporation
• Investigation of the effect of flow rate on the evaporation process
• Investigation of the effect of temperature on the evaporation process
• Investigation of the effect of pressure on the evaporation process
• Observation of:
  • Single phase liquid flow
  • Bubbly flow
  • Slug flow
  • Annular flow
  • Film boiling
  • Drop flow (mist)
  • Single phase vapour flow

Standard Accessories

• Laboratory trolley with strong HDF sheet
• Evaporation pipe made of double-wall glass, heated with hot water
• Evaporation in inner pipe, heating in the outer sheath
• Circulating pump
• Water jet pump for generating partial vacuum
• CFC free evaporation liquid

Optional Accessories (If Available)

Software TH-3120SW (optional)

• DAQ software specially designed in National Instrument™, LABVIEW™ environment to measure and calculate the results of apparatus.
• While using software a set of electronic sensors are included.
• Software can be run with any Windows™ environment.