Exhaust Gas Heat Exchangers - Gasketed Plate Heat Exchanger
These heat exchangers are designed to remove thermal energy from the exhaust gas of natural gas, diesel and bio-fuel engines and transfer it to the water circuit. The extracted heat can be used for space heating, domestic hot water and any industrial process that requires hot water.
- Standard range available for quick delivery.
- Suitable for engines up to 1MW.
- Suitable for use with engines powered by conventional and alternative fuels.
- Fully welded stainless steel construction for reliability and durability.
- Can also be used to extract energy from gas or air and transfer it to the water circuit.
- Compact and highly efficient design for ease of installation.
- Ideal to reduce the exit temperature of the exhaust gases in hazardous areas.
- Used in conjunction with jacket water, charge air, fuel and oil coolers, Bowman units can reclaim up to 60% of waste heat from an engine.
- Bowman units when fitted provide FREE HEATING & HOT WATER.
Given the following information, our thermal engineers can recommend a unit specific to your requirements:
Fuel type
Exhaust Gas Mass Flow Rate
Exhaust Gas Inlet Temperature
Water Circuit Inlet Temperature and Flow Rate
Typical set up showing full heat transfer configuration for CHP using Bowman Heat Exchangers
Provision should be made for cooling the engine water, oil and gas when heat recovery is not required.
The figures below are a general guide only and are not based on any particular natural gas engine. They assume an air/fuel ratio of 10.23 : 1 by volume, a fuel consumption of 0.34m3/kWh (measured at 1.013 bar and 15oC) and an exhaust gas temperature of 600oC and a water inlet temperature of 80oC.
| Type | Gen Set Rating | Performance | |||
| Typical Engine power kW | Exhaust gas flow kg/min | Exhaust gas outlet temp °C | Heat recovery kW | Exhaust gas pressure drop kPa | |
| 2-25-3737-4 2-32-3737-5 | 16 16 | 1.2 1.2 | 210 170 | 9.5 10.5 | 2.4 2.8 |
| 3-32-3738-5 3-40-3738-6 3-60-3738-8 | 32 32 32 | 2.4 2.4 2.4 | 210 170 120 | 19 21 23 | 2.4 2.8 3.4 |
| 4-32-3739-5 4-40-3739-6 4-60-3739-8 | 60 60 60 | 4.5 4.5 4.5 | 210 170 120 | 35 39 43 | 2.2 2.4 3.0 |
| 5-32-3740-5 5-40-3740-6 5-60-3740-8 | 90 90 90 | 6.7 6.7 6.7 | 210 170 120 | 52 57 65 | 2.1 2.4 2.9 |
| 6-32-3741-5 6-40-3741-6 6-60-3741-8 | 140 140 140 | 10.5 10.5 10.5 | 210 170 120 | 82 90 101 | 2.2 2.4 3.0 |
| 8-32-3742-5 8-40-3742-6 8-60-3742-8 | 250 250 250 | 18.7 18.7 18.7 | 210 170 120 | 147 160 181 | 2.3 2.5 3.0 |
| 10-32-3743-5 10-40-3743-6 10-60-3743-8 | 400 400 400 | 30.0 30.0 30.0 | 210 170 120 | 236 256 288 | 2.4 2.6 3.1 |
| 12-32-3744-5 12-40-3744-6 12-60-3744-8 | 600 600 600 | 45.0 45.0 45.0 | 210 170 120 | 353 380 425 | 2.3 2.5 3.1 |
For larger sizes contact our sales department. 100kPa-1 bar
Maximum working gas side pressure 0.5 bar Maximum working gas side temperature 700ºC
Maximum working water side pressure 4 bar Maximum working water side temperature 110ºC
This range of products fall within Article 3 Paragraph 3 (Sound Engineering Practice) and do not require CE marking.
his table shows the heat that can be removed from each type of heat exchanger as shown in the illustration on page 2.
| Type | Gen Set rating kva | Jacket Water kW | Engine Oil kW | Charge Air Cooler kW | Exhaust Gas kW | Total Reclaimed Energy kW |
| 2" | 16 | 5 | 2 | 2.5 | 11.5 | 20.5 |
| 3" | 32 | 10 | 4 | 5 | 23 | 41 |
| 4" | 60 | 18 | 7 | 9 | 43 | 77 |
| 5" | 90 | 27 | 10 | 14 | 65 | 115 |
| 6" | 140 | 42 | 15 | 21 | 101 | 179 |
| 8" | 250 | 75 | 28 | 38 | 181 | 321 |
| 10" | 400 | 120 | 44 | 60 | 288 | 512 |
| 12" | 600 | 180 | 66 | 90 | 425 | 761 |
Above figures are used as a guide only, optimised design available on request.
| A | B | C | D | E | F | H | J | K | L | M | N | P | R | Kgs | |
| 2-25-3737-4 2-32-3737-5 | mm 754 932 | mm 540 718 | mm 584 762 | mm 60.3 60.3 | mm 100 100 | mm 75 75 | mm 83 83 | mm 60 60 | mm 9 9 | BSP R P3⁄4 " R P3⁄4 " | mm 34 34 | mm 75 75 | mm 4x11 4x11 | mm 16 16 | 10 12 |
| 3-32-3738-5 3-40-3738-6 3-60-3738-8 | 962 1164 1672 | 718 920 1428 | 762 964 1472 | 89 89 89 | 140 140 140 | 60 60 60 | 75 75 75 | 70 70 70 | 9 9 9 | RP1" RP1" RP1" | 54 54 54 | 110 110 110 | 4x14 4x14 4x14 | 16 16 16 | 18 20 27 |
| 4-32-3739-5 4-40-3739-6 4-60-3739-8 | 992 1194 1702 | 698 900 1408 | 762 964 1472 | 114 114 114 | 160 160 160 | 80 80 80 | 90 90 90 | 85 85 85 | 9 9 9 | RP1 2" RP1 1⁄2" RP1 1⁄2" | 66 66 66 | 130 130 130 | 4x14 4x14 4x14 | 22 22 22 | 24 28 42 |
| 5-32-3740-5 5-40-3740-6 5-60-3740-8 | 1032 1234 1742 | 688 890 1398 | 967 624 1472 | 141 141 141 | 190 190 190 | 100 100 100 | 105 105 105 | 100 100 100 | 11 11 11 | RP2" RP2" RP2" | 82 82 82 | 150 150 150 | 4x18 4x18 4x18 | 26 26 26 | 36 39 51 |
| A | B | C | D | E | F | H | J | K | L | M | N | P | R | Kgs | |
| 6-32-3741-5 6-40-3741-6 6-60-3741-8 | mm 1082 1284 1792 | mm 668 870 1378 | mm 762 964 1472 | mm 168 168 168 | mm 210 210 210 | mm 130 130 130 | mm 120 120 120 | mm 140 140 140 | mm 11 11 11 | Flange DN60* DN60* DN60* | mm 104 104 104 | mm 170 170 170 | mm 4x18 4x18 4x18 | mm 28 28 28 | 51 53 75 |
| 8-32-3742-5 8-40-3742-6 8-60-3742-8 | 1152 1354 1862 | 648 850 1358 | 752 954 1462 | 219 219 219 | 240 240 240 | 180 180 180 | 150 150 150 | 180 180 180 | 14 14 14 | DN80* DN80* DN80* | 130 130 130 | 200 200 200 | 8x18 8x18 8x18 | 40 40 40 | 85 98 121 |
| 10-32-3743-5 10-40-3743-6 10-60-3743-8 | 1232 1434 1942 | 608 810 1318 | 752 954 1462 | 273 273 273 | 265 265 265 | 250 250 250 | 180 180 180 | 220 220 220 | 14 14 14 | DN100* DN100* DN100* | 154 154 154 | 225 225 225 | 8x18 8x18 8x18 | 55 55 55 | 132 146 181 |
| 12-32-3744-5 12-40-3744-6 12-60-3744-8 | 1332 1534 2042 | 538 740 1248 | 738 940 1448 | 324 324 324 | 320 320 320 | 300 300 300 | 220 220 220 | 270 270 270 | 18 18 18 | DN150* DN150* DN150* | 204 204 204 | 280 280 280 | 8x18 8x18 8x18 | 55 55 55 | 190 208 262 |
The heat exchanger must be installed horizontally and levelled accurately, with the primary circuit (tubeside) being installed through the tubes and the secondary circuit (shellside) being installed over the tubes. The heat exchanger should only be connected in “counter flow” with the secondary circuit (shellside) connections always being positioned on top. (See schematic diagram below).
Alternative installations may also be acceptable; consultation with the technical department for acceptance should be made prior to installation. It is very important that the secondary circuit is fully vented via the vent plug fitted in order to prevent any aeration taking place which can cause corrosion of the tubes.
If ethylene glycol or any other heat transfer fluid is to be utilised within the secondary circuit, adequate mixing should be performed prior to filling of the heat exchanger.
If temperature control sensors are fitted to either the primary or secondary circuits of the heat exchanger, they should be fitted to the inlet circuit and not the outlet circuit in order to provide accurate temperature readings.
The pressure relief valve should not be removed or tampered with.
Adequate provision should be made to ensure that in the event of the primary circuit being shutdown, the secondary circuit continues to operate for a period of time to enable the dispersal of residual heat to an acceptable level, preventing any damage to the heat exchanger. Adequate provision should also be made to ensure that the secondary circuit pumps are in continual operation whenever the primary circuit is in operation. Provision should also be made to ensure that any valves or ancillary equipment associated to either the primary or secondary side of the heat exchanger can not be accidentally turned off, therefore preventing flow through the heat exchanger.
