Heat pipe heat exchangers
manufactured for a Canadian Company

 

Gas-to-gas heat pipe based recovery system installed in Kentucky, USA
Destination: combustion air preheating for an aluminum smelter
Manufactured and Installed: 2005 - 2006


The above heat pipe heat exchanger ready for transport

Main specs
- Exhaust mass flow rate: 3,470 Kg/h
- Exhaust average inlet temperature (before unit): 480 C
- Exhaust average outlet temperature (after unit): 270 C
- Combustion air mass flow rate: 3,281 Kg/h
- Combustion air inlet temperature (before unit): 10 C
- Combustion air outlet temperature (after unit): 385 C
- Duty: 363,166 [w] (1,239,396 BTU/h)
- Heat pipes made of carbon steel tube 28x2.5 mm
- Heat pipe working fluids: toluene, dowtherm A, naphthalene
- Total length of a heat pipe: 2,016 mm
- Total number of heat pipes: 725 pcs
- Pressure loss on the exhaust side: 20 mmWC (water column)
- Pressure loss on the air side: 13 mmWC (water column)
- Total weight: 3,200 Kg
- Overall dimensions:2,110 x 1,114 x 1,156 mm


Isothermal oven for growing crystals experiments in a German laboratory
- Working fluid: sodium
- Dimensions: length, 500 mm; outside diameter, 51 mm; inner working space dia, 25 mm
Manufacured: 2003


Low cost Sodium heat pipe during manufacturing process (EC financed project)
- Dimensions: length, 2800 mm; outside diameter, 38 mm; inside diameter, 32 mm
- Destination: catalytic reactors (for details click the left link)
Manufactured: 2005


Gas_to_water type heat pipe heat exchanger
Destination: preheating the feeding water for steam boilers
Manufactured: 2002

Main Specs
- Exhausts mass flow rate: 1504 Kg/h
- Exhausts inlet temperature: 284 oC
- Water inlet temperature at start up: 10 oC
- Duty: 70,567 Kcal/h (280,012 BTU/h)
- Heat pipes made of copper tube 22x1 mm
- Heat pipe working fluid: distilled water
- Total length of a heat pipe: 820 mm
- Total number of heat pipes: 253
- Estimated average exhaust velocity through the heat pipe bundle: 2.91 m/s
- Estimated pressure loss on the exhausts side: 13 mmWC (water column)
- Total weight: 337 Kg/unit
- Dimensions
o Total length (between flue flanges): 1630 mm
o Total height (between inspection plate and water side flanges): 950 mm
o Outside diameter of the separation plate: 843 mm.


Gas_to_water type heat pipe heat exchanger
Destination: preheating the feeding water for steam boilers
Manufactured: 2004

Main Specs
- Exhausts mass flow rate: 3799 Kg/h
- Exhausts inlet temperature: 232 oC
- Water inlet temperature at start up: 10 oC
- Duty: 127,874 Kcal/h (507,405 BTU/h)
- Heat pipes made of copper tube 22x1 mm
- Heat pipe working fluid: distilled water
- Total length of a heat pipe: 1385 mm
- Total number of heat pipes: 253
- Estimated average exhaust velocity through the heat pipe bundle: 3,74 m/s
- Estimated pressure loss on the exhausts side: 17 mmWC (water column)
- Total weight: 545 Kg/unit
- Dimensions
o Total height (between connection pieces flanges): 2402 mm
o Total length (between inspection plate and water side flanges): 1560 mm
o Outside diameter of the separation plate: 843 mm.


Gas_to_water type heat pipe heat exchanger
Destination: preheating water for swimming pools (150 Kw boilers)
Manufactured: 2004

Main Specs
- Exhaust mass flow rate: 275 Kg/h
- Exhaust average inlet temperature: 230 oC
- Water recirculation average temperature: 20 35 oC
- Water recirculation maximum recommended mass rate: 8,000 Kg/h
- Water recirculation minimum recommended mass rate: 4,000 Kg/h
- Duty: 8,250 Kcal/h (9,593 w) (32,739 BTU/h)
- Heat pipes made of copper tube 22x0.8 mm
- Heat pipe working fluid: distilled water
- Total length of a heat pipe: 420 mm
- Total number of heat pipes: 69 pcs
- Estimated average exhaust velocity through the heat pipe bundle: 1.8 m/s
- Estimated pressure loss on the exhaust side: 10 mmWC (water column)
- Total weight: 55 Kg
- Dimensions
Length (between exhaust side flanges): 562 mm
Total height (between inspection plate and water side flanges): 535 mm
Outside diameter of the separation plate: 411 mm.
Flange inner diameter on the exhaust side: 178 mm


Gas_to_water type heat pipe heat exchanger
Destination: preheating tap hot water
Manufactured: 2004

Main Specs
- Exhaust mass flow rate: 676 Kg/h
- Exhaust average inlet temperature (before unit): 246 oC
- Exhaust average outlet temperature (after unit): 100 oC
- Tap water mass rate: 2,000 Kg/h
- Tap water inlet temperature: 10 oC
- Tap water outlet temperature: 22.3 oC
- Duty: 28,691 [w] (97,919 BTU/h)
- Heat pipes made of copper tube 22x0.8 mm
- Heat pipe working fluid: distilled water
- Total length of a heat pipe: 745 mm
- Total number of heat pipes: 103 pcs
- Estimated average exhaust velocity through the heat pipe bundle: 2.21 m/s
- Maximum allowable pressure on the water side: 6 bar
- Estimated pressure loss on the exhaust side: 10 mmWC (water column)
- Total weight: 127 Kg
- Overall dimensions:
Total height (between inspection plate and water side flanges): 870 mm
Length between exhaust side flanges: 648 mm
Outside diameter of the separation plate: 487 mm.
Flange inner diameter on the exhaust side: 200 mm.
- The casings on the exhaust and the water side are made of carbon steel. The inner surface of the casing on the water side is plated with a tin-silver alloy.
- The heat pipes are soldered in the carbon steel separation plate. The tin-silver soldering material withstand 220 oC. Soldering material is in permanent contact with water.
- The separation plate on the water side is plated with a tin-silver alloy.
- The connection pieces on the water side are made by AISI 316 stainless steel.
- Double flanges on the exhaust side and on the water side to ease the installation.