Concentric Tube Heat Exchanger
Product Code : EL-HTL-11091
Quick answer: The concentric tube heat exchanger is a double pipe unit: hot water flows through a copper inner tube and cold water through the outer GI pipe. Students run it in parallel flow and counter flow to find heat transferred, LMTD and effectiveness over a 1.5 m length, with a 3 kW geyser as the hot water source. Lab Exports manufactures it in Delhi for engineering colleges, polytechnics and TVET institutes.
Specifications
| Component | Specification |
|---|---|
| Inner tube | Copper, 12.7 mm ID |
| Outer tube | GI pipe |
| Heat exchange length | 1.5 m |
| Temperature measurement | 4 thermometers (hot and cold, inlet and outlet) |
| Flow measurement | Measuring flask, 1 litre |
| Hot water source | Geyser, 3 kW, single phase |
| Flow arrangements | Parallel flow and counter flow |
| Electrical supply | 220 V, 15 A stabilised single-phase AC |
| Floor area | 3 m x 1 m x 1 m height |
How the concentric tube heat exchanger experiment is done
In a double pipe heat exchanger, heat passes from the hot stream in the inner tube, through the copper wall, to the cold stream in the annulus. When both streams move in the same direction the unit works in parallel flow; when they move in opposite directions it works in counter flow, which keeps a larger temperature difference along the tube and moves more heat for the same length.
The heat given up by the hot water is Q = m x cp x (Th,in - Th,out). The log mean temperature difference is LMTD = (dT1 - dT2) / ln(dT1/dT2), where dT1 and dT2 are the temperature differences at the two ends. The overall heat transfer coefficient follows from U = Q / (A x LMTD), and effectiveness compares the actual heat transfer with the maximum possible.
- Switch on the geyser and let hot water flow through the copper inner tube at a steady rate.
- Set the cold water valves for parallel flow and fix the cold water flow rate.
- Time the filling of the 1 litre measuring flask to find each mass flow rate.
- When the four thermometer readings are steady, record the hot and cold inlet and outlet temperatures.
- Change the valves to counter flow, repeat the readings, and compare heat transferred, LMTD and effectiveness for the two arrangements.
Key features
- Copper inner tube of 12.7 mm ID for good conduction between the two streams
- Valve arrangement for both parallel-flow and counter-flow runs on the same unit
- Four thermometers covering the inlet and outlet of the hot and cold streams
- 1 litre measuring flask for flow-rate measurement by timed collection
- 3 kW single-phase geyser as a steady hot water supply
- Compact floor area of about 3 m x 1 m
Documentation and supply
Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the concentric tube heat exchanger at its works in Laxmi Nagar, Delhi, and supplies it to engineering colleges, polytechnics and TVET institutes in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Heat Transfer Lab products
- Critical Heat Flux Apparatus (EL-HTL-11090)
- Shell Tube Heat Exchanger Water to Water (EL-HTL-11092)
- Stefan-Boltzmann Apparatus (EL-HTL-11089)
- Plate Type Heat Exchanger Apparatus (EL-HTL-11093)
- Emissivity Measurement Apparatus (EL-HTL-11088)
- Thermal Conductivity of Metal Rod (EL-HTL-11094)
The full range is in the Heat Transfer Lab section of the Engineering Lab range.
Frequently asked questions
What does the concentric tube heat exchanger demonstrate?
It shows heat transfer between hot and cold water in a double pipe exchanger and lets students compare parallel flow with counter flow in terms of heat transferred, LMTD and effectiveness.
What services does the apparatus need?
A 220 V, 15 A stabilised single-phase AC supply and a floor area of about 3 m x 1 m x 1 m height.
What is the price of the concentric tube heat exchanger?
Prices are not published on the website. Add the concentric tube heat exchanger to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-HTL-11091 and the quantity, to receive a quotation.
Does Lab Exports manufacture the concentric tube heat exchanger?
Yes. Lab Exports manufactures the concentric tube heat exchanger at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-HTL-11091.
Request a quote
Email [email protected] with the house code EL-HTL-11091 and the quantity, or add the concentric tube heat exchanger to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.