Waste heat recovery
Waste heat recovery
With the rapid development of the machinery industry, the energy crisis and environmental pollution caused by the rapid development of machinery industry has become a serious problem to be solved urgently in all countries in the world...
Air compressor equipment has high energy consumption and accounts for a large proportion of energy consumption
(1) Power consumption analysis
According to the statistics of the U.S. Department of Energy: When the air compressor is running, the real power consumed to increase the potential energy of the air accounts for only 15% of the total power consumption, and about 85% of the power is converted into heat. way to release into the air
(2) Thermal energy analysis
This heat is directly discharged, which not only wastes a lot of heat energy, but also aggravates the "greenhouse effect" of the atmosphere and causes thermal pollution. In fact, 85% of the wasted heat can be recycled by using the air compressor heat energy recovery technology, which is equivalent to about 60-70% of the shaft power of the compressor...
Waste heat recovery
Air compressors discharge a lot of waste heat to nature through air coolers or water coolers, if we calculate the electricity and oil costs required of electric water heaters or diesel boilers to create these heat, you can clearly know the value of this waste heat
Principle and Application
Air compressor waste heat recovery is to recycle the heat generated by the air compressor when it is working, mainly to recover the heat generated by the air...
The heat generated by the air compressor during operation can be recovered through the HRS (waste heat recovery system), and the hot water is directly discharged to the insulation water tank through the circulating pump.
Aineng (AE) air compressor waste heat recovery unit is a new type of waste heat utilization equipment. As the main role of waste heat recovery, it uses the ...
Application of Air Compressor Waste Heat Recovery System
Features of Air Compressor Waste Heat Recovery System
● Make the air compressor work at a constant temperature (equivalent to water cooling for the air compressor)
● Extend the "lifetime" of the air compressor
● Increase the "pumping capacity" of the air compressor
● Provide a steady stream of "hot water" (domestic or industrial)
● Extend the replacement cycle of the "consumables" of the air compressor.
Advantages of air compressor waste heat recovery system
01
Zero running cost
one-time investment
Makes hot water, does not burn and does not consume electricity and oil, completely utilizes the heat energy of the screw air compressor, and can be used free of charge for a long time; there is no cost for regular maintenance, maintenance and inspection in the later period. one-time investment
02
Improve the operating efficiency of the air...
The rated gas production of the air compressor is determined by the temperature measurement of 80 °C. For every 1 °C increase in temperature, the gas production decreases by 0.5%, and when the temperature increases by 10 °C, the gas production...
03
Not affected by weather
Hot water can be supplied as long as the air compressor is running
04
Reduce the failure rate and improve the service...
The reduction of the working temperature of the air compressor reduces the failure of the machine, prolongs the service life of the equipment, reduces the maintenance cost, increases the replacement time of the oil, oil separator, and oil/air separator, and accordingly prolongs the replacement period of the equipment.
05
Meet environmental requirements
Energy saving, safety, hygiene, convenience and zero cost
Application examples
Parameter table of hot water production capacity of waste heat recovery system of screw air compressor:
(The operating pressure of the air compressor is greater than 7.6Kgf/cm2)
Waste heat recovery
| Model power | Recoverable heat （kcal） |
Hourly water productionm3/h 20℃-50℃ |
Hourly water productionm3/h 20℃-55℃ |
Hourly water productionm3/h 20℃-60℃ |
Hourly water productionm3/h 20℃-65℃ |
| 15KW | 13500 | 0.45 | 0.38 | 0.34 | 0.3 |
| 22KW | 19800 | 0.66 | 0.57 | 0.50 | 0.44 |
| 30KW | 27000 | 0.90 | 0.76 | 0.68 | 0.60 |
| 37KW | 33300 | 1.11 | 0.95 | 0.83 | 0.74 |
| 45KW | 39600 | 1.32 | 1.13 | 0.99 | 0.87 |
| 55KW | 49500 | 1.65 | 1.41 | 1.24 | 1.10 |
| 75KW | 67500 | 2.25 | 1.92 | 1.68 | 1.5 |
| 90KW | 81000 | 2.70 | 2.31 | 2.03 | 1.80 |
Calculation of the amount of hot water produced by the waste heat recovery system of the screw air compressor: ※100HP (75kw) air compressor.
※One 100HP (75kw) air compressor.
※Operating time is 24 hours.
※The temperature rise is 20℃-55℃ (see the table for water production).
※The water consumption per bucket is 20L/person·day.
Water production Q=24 hours/day×1.92m3/hour=46m3/day=46 tons/day.
N=46m3/day÷20L/person·day=46000L/day÷20L/person·day=2300 persons.
The 100HP air compressor can run for 24 hours and can satisfy 2300 people with water.
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