Concentric Tube Heat Exchanger Manufacturer,Supplier and Exporter in India
Product Code : EL-HTL-10051
Jlab Export is a leading Concentric Tube Heat Exchanger Manufacturer,and suppliers in India
Concentric Tube Heat Exchanger (code EL-HTL-10051) is a double-pipe exchanger in which hot water from a 3 kW geyser flows through a copper inner tube while the cold stream passes through the surrounding GI pipe, in parallel or counter flow. It comes as a plain tube water-to-water unit or a finned tube water-to-air unit. JLab makes both heat exchanger versions in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Versions | A: plain tube, water to water; B: finned tube, water to air |
| Inner tube | Copper, ID 12.7 mm |
| Outer pipe | GI, ID 15 mm approx., 1.5 m long (A); ID 25 mm approx., 1 m long (B) |
| Thermometers | 4 nos. |
| Flow measurement | 1 litre measuring flask; orifice meter and manometer for air (B) |
| Hot water | Geyser, 3 kW, single phase |
| Electrical supply | 220 V, 15 A, stabilised single-phase AC |
| Floor area | 3 m x 1 m x 1 m height |
| Quality check | Each heat exchanger is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Product code | EL-HTL-10051 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Plain Tube or Finned Tube
In version A cold water fills the annulus, so liquid wets both sides of the copper wall. In version B cold air takes its place. The air-side film coefficient is far lower than the water side, so the copper tube is finned on its outer diameter to add surface, and the orifice meter and manometer measure the air flow. Both versions read the inlet and outlet temperatures on four thermometers.
Working Out LMTD and Effectiveness
Timing the water into the 1 litre measuring flask gives the mass flow m of each water stream, and Q = m cp (Th1 − Th2) is the heat the hot water gives up from inlet to outlet. With ΔT1 and ΔT2 as the temperature differences between the two streams at each end, LMTD = (ΔT1 − ΔT2) / ln(ΔT1 / ΔT2), and the overall coefficient follows from U = Q / (A × LMTD). Effectiveness is Q divided by the most heat that could pass, Cmin (Th1 − Tc1). Running the cold stream both ways at the same flows shows why counter flow gives the larger LMTD and effectiveness: only in counter flow can the cold outlet end up hotter than the hot outlet.
Other Laboratory Heat Exchangers
- Parallel and Counter Flow Heat Exchanger — concentric tube unit with pump-circulated hot water and rotameters.
- Plate Type Heat Exchanger Apparatus — hot and cold water between alternate stainless steel plates, in counter flow.
- Shell and Tube Heat Exchanger — two-pass copper tubes with baffles inside a stainless steel shell.
- Cross Flow Heat Exchanger — water and air streams crossing, read by K-type thermocouples.
The Heat Transfer Lab section of Engineering Lab Equipment lists these exchangers with the conduction and boiling rigs.
Request a Quote
Order through Add To Cart, or send the version (plain or finned tube), the quantity and the delivery address through the contact page for a quotation.
Last updated: 30 October 2026
