It’s not just about energy savings; the continuous profits generated by heat recovery from air compressors

Reasonable use leads to better energy efficiency. Air compressors consume a large amount of electricity; the power required to produce compressed gas is not high, with 80% of the electrical energy being converted into heat by the compressor, which is usually wasted through the cooling system. In the waste heat recovery of air compressors, the efficiency of waste heat recovery is between 70% and 90%, allowing for the recovery and utilization of 50% to 70% of the shaft power. Taking a 132kw oil-injected screw air compressor as an example: the wasted electrical energy is 105.6kw/h, and the heat recovery efficiency is 80%. Therefore, 73,000 kcal of heat can be recovered in 1 hour, 1,755,000 kcal in 1 day, and 578,950,000 kcal in 330 days per year

Heat recovery from air compressors, comparative analysis with different energy consumptions:

For enterprises’ factories, continuous profit generation makes hot water demand very important. In terms of daily life: hot water for dormitories, canteens, and bathhouses, as well as heating in office areas and living areas (in northern regions) ； In terms of processes: maintaining a constant temperature in the workshop, heating for cleaning, heating for drying lines (rooms), as well as water supply to boilers and the heat required by central air conditioning systems. Energy-saving renovation for waste heat recovery in air compressors: On one hand, the temperature of the hot water generated is generally between 50°C and 80°C, which is sufficient to meet the thermal needs of factory operations and daily activities. The hot water is delivered continuously and stably to the points of use, in sufficient quantities at regular intervals. On the other hand, disabling the original cooling system of the air compressor effectively improves its operating conditions, indirectly extending its service life and reducing the substantial costs associated with its maintenance.

Therefore, the waste heat recovery from air compressors is used to generate hot water free of charge, helping factories eliminate inefficient heating methods, make more efficient use of energy, reduce energy consumption costs, and maximize energy savings. Improve employee quality of life and production workshop processes to continuously generate greater profits for the company.

The energy-saving tubular air compressor waste heat recovery system, which offers significant advantages in terms of energy conservation, has been adopted across various industries; with over 500 enterprise users, it helps them achieve continuous energy savings and has received widespread recognition. 1) Unique direct-heating structure, no need for circulation; small pipes, stable flow rate, simple control, and low failure rate ； 2) High heat recovery efficiency, dual heat recovery for oil and gas, low pressure loss, large temperature difference between inlet and outlet water ； 3) It is not prone to scaling; the heat exchanger is divided into a low-temperature zone and a high-temperature zone, with 2/3 being the cold water zone, resulting in a low likelihood of scaling. Custom energy-saving solutions for factories, designed based on actual operating conditions, with a short payback period (typically, the investment is recouped within 2 years).

Compressed oil and gas are usually followed by air cooling and water cooling, right?

Some waste heat recovery requires consideration of cost value.

In existing industries, thermal energy is generally in excess, especially in the processing and manufacturing sector. There is ample low-temperature waste heat available; the issues involved are cost, on one hand, and whether the enterprises need it, on the other. The simplest method at present is direct air convection heat transfer, by releasing the heat into the atmosphere, which is more cost-effective.

Is there a specific plan? Input-output calculation?