Products : Heat Pipe Recovery Boiler    | BACK  | PRODUCTS  | HOME |

HEAT PIPE
A heat pipe is a simple device that can quickly transfer heat from one point to another without the need of energy input. Heat pipes are often referred to as the "superconductors" of heat as they possess an extraordinary heat transfer capacity with almost no loss. The heat pipe itself is not a new invention; early heat pipes, developed near the turn of the century, were constructed out of hollow metal tubes which were sealed at both ends, vacuumed and charged with a small amount of evaporative fluid. They contained a "wick" to transport the fluid from one end of the heat pipe to the other. Relying on the energy absorbed and released from the "phase-change" of the fluid, the hollow heat pipe transfers heat at extremely high speed. Heat applied to one end of the pipe would instantaneously evaporate the fluid inside. This vapor would then move to the other "colder" end of the pipe and condense back to liquid form, releasing the heat absorbed during the evaporation. Heat pipe is able to transfer heat thousands of times faster than a solid copper rod, but it was considered too expensive for commercial uses due to its complex wick construction. Therefore, heat pipes were limited to mostly scientific and exotic applications such as those use in the space industry.

APPLICATION OF HEAT PIPE TO WASTE HEAT RECOVERY BOILER
Hamada Boiler has developed a very unique waste heat recovery boiler with the application of heat pipe to recover heat energy from the waste exhaust gas of Diesel Engine Generator. Exhaust gas temperature varies from 300 - 400 oC in most of Diesel Generator. If conventional type of boiler is used which heat transfer rely on the heat conductivity through the boiler tube, size of the boiler will become very big and usually the air-resistance will be above 100 mmH2O. With the application of heat pipe technology, we have made the boiler far smaller than the conventional model with air-resistance far below 100 mmH2O which is important for prevention of back-fire of the Diesel Engine.

INSTALLATION OF HEAT PIPE WASTE RECOVERY BOILER at Textile Printing Factory in Indonesia PT. INDONESIA ASAHI CHEMICAL INDUSTRY, Jati Luhur, Purwakarta, Jawa Barat (Japanese Foreign Investment Company)

Diesel Generator : 3 units total of 3800 KW (YANMAR BRAND)
Hamada Heat Pipe Boiler Model CRG-1522
Steam Evaporation Rate : 2200 Kg/h saturated steam 6Kg/cm2 pressure
ENERGY SAVING: 2.2 ton steam/h x US$10 (cost of steam/ton)=US$22.00/hour

Heat transfer by latent heat of water inside the heat pipe
SURPRISINGLY HIGH HEAT TRANSFER COEFFICIENCY

[SAMPLE CASE]
1,000,000 Kcal/H heat transfer to evaporation
Diesel Generator Capacity : 2250 KW
Exhaust gas temperature : 350 - 400 oC
Hamada Heat Pipe Boiler Model CRG-1015
Heating Surface: 200 M2



Number of finned tube : 138 pcs. Finned Tube Length: 3000 mm (1500 mm bared tube 1500 mm finned tube) dia.of tube OD32 mm x t3 mm Finne size: 64 mm x t1.2 mm p4.8 mm

Boiler
Operating at PT. SUMIRUBBER Indonesia

Horizontal Multitube Model Heat Pipe recovery Boiler


  MODEL Weight Ton Exhaust Gas Temp. %degC Dimension LxHxW (mtr.) Heating Surface (m2) Number of Thermal Tubes Steam (kg./cm2) Air Resistance (mmH2O) Genset Diesel Generation Capacity kW TVTB-Boiler Evaporation kg./hr.
  CRG-152 0.6 0.9 300-400 1.47x2.1x1.08 18.5 56 6 20 330 150-220
  CRG-203 1.0 1.4 300-400 1.8x2.55x1.29 36 77 6 20 450 250-300
  CRG-345 1.7 2.2 300-400 1.97x2.63x1.31 52.8 115 6 30 675 400-450
  CRG-406 2.0 2.4 300-400 2.2x2.83x1.31 66 115 6 30 900 520-600
  CRG-575 2.2 2.8 300-400 2.3x3.2x1.52 128 115 6 40 1125 680-750
  CRG-609 2.6 3.4 300-400 2.56x3.0x1.52 165 115 6 40 1350 800-900
  CRG-710 2.8 3.4 300-400 2.5x3.0x1.4 170 138 6 50 1500 900-1050
  CRG-812 3.2 4.0 300-400 3.02x4.05x1.6 180 138 6 50 1800 1100-1200
  CRG-1015 4.5 5.3 300-400 3.2x4.25x1.8 200 138 6 50 2250 1400-1500
  CRG-1522 6.2 7.4 300-400 3.6x4.5x1.9 220 160 6 60 3300 2100-2200
  CRG-2030 7.75 9.35 300-400 3.9x4.7x2.0 240 160 6 60 4500 2900-3000
  CRG-2537 9.25 11.3 300-400 4.2x4.8x2.2 260 160 6 60 5600 3600-3750