Compressor  motor power kW		Heating power recovery kW		Fuel saving (4000 hours/year) l/year		Yearly saving (0,70 € / lt) Euro/year
37		30		16.070		11.256
45		36		19.280		13.510
55		44		23.570		16.495
75		60		32.130		22.790
90		72		38.560		26.780
110		88		47.130		32.870
132		106		56.770		39.685
160		125		68.550		47.985

In addition to the negative impact of the carbon footprint on the environment, we are aware that manufacturers bear the financial burden of energy consumption and that energy costs can account for up to 80 % of the total cost of producing compressed air.

Statistics show that compressed air typically accounts for around 12 % of total energy costs for industrial manufacturers – in some cases this figure can be as high as 40%. However, the good news is that between 70-94 % of the energy consumed by air compressors can be recovered. Without any form of energy recovery, this energy is lost through radiation to the atmosphere or cooling systems.
 
In any case, by extracting heat from compressed air, we can reduce the need to purchase energy, thereby reducing CO₂ emissions and lowering operating costs. Due to the high cost of energy, these savings can be significant in terms of helping companies achieve their carbon reduction goals and doing so, will also decrease total lifecycle costs of their process plants.
 

How can heat be recovered in compressed air systems?

Coolers remove heat from compressed air using air, water or oil and work on the principle of heat exchange. The heat removed from the hot compressed air is discharged into the cooler, which is specifically designed for the compressor’s flow rate and heat transfer requirements. Different types of cooling systems are used for air compressors, each with its own advantages and disadvantages, and some can recover up to 94 % of the energy supplied to the air compressor.
 


There are several types of AirWATT connections to heating systems. An example of an indirect connection via a storage tank:


In any case, contact our heat recovery experts who will be more than happy to prepare an energy savings calculation for your compressed air system!