Heat Recovery Systems For hot air and hot water applications www.kaeser.com

Heat recovery systems Save money whilst conserving the environment Why choose heat recovery? In fact, the question should be: Why not? Amazingly, almost 100% of the electrical energy supplied to a rotary screw compressor is converted into heat energy. Up to 96% of this energy can be recovered and reused for heating purposes. This not only reduces primary energy consumption, but also significantly improves a company’s overall energy balance. Compressor heat Rotary screw compressors, boosters and blowers convert almost 100% of the electrical drive energy supplied to them into heat. The heat flow...

Heat recovery systems – Hot air Minimise primary energy consumption for heating As self-contained complete systems, modern rotary screw compressors, boosters and blowers are especially well suited to heat recovery systems. In particular, direct use of the recoverable heat via an exhaust air ducting system enables up to 96% of the total energy input to be recovered and reused. This is the case regardless of whether a fluid-injecting or a dry compression rotary screw compressor, a booster or a blower is involved. Heating with hot air By using heated cooling air from the compressor, neighbouring...

Heat recovery systems – Hot water Minimise primary energy consumption for process, service and hot water heating By reusing the exhaust heat from the compressor, heat exchanger systems can provide heating and service water on demand at temperatures up to +70°C, or even +85°C if required. For standard applications using heat recovery systems for the production of hot water and service water, PTG platetype heat exchangers are used. Special, fail-safe heat exchangers are used in the case of operations without an interconnected water circuit, or for applications with the highest demands of purity...

Equipment for rotary screw compressors Heat exchanger (Internal) Hot air heat recovery All KAESER rotary screw compressors can be connected to user-provided exhaust air ducting, allowing the heated cooling air to be used for the purposes of space heating. Possible applications include drying processes, heating of halls and buildings, air curtain systems and the preheating of burner air. Oil-injected rotary screw compressor, air-cooled PTG plate-type heat exchanger system Rotary screw compressors from the SM series (from 5.5 kW) and upwards can be equipped with PTG systems. Depending on the size...

Technical specifications for rotary screw compressors Hot air Hot water Type Savings calculation example for ASD 50 For fuel oil For natural gas Savings calculation example for ASD 50 For fuel oil Maximum available heat output: 28.0 kW Calorific value per litre of fuel oil: 9861 kWh/l Fuel oil heating efficiency: 90% Price per litre of fuel oil: € 1.50/l Cost savings: - x € 1.50/l = € 18,930 per year For natural gas Maximum available heat output: 28.0 kW Calorific value per m3 of natural gas: 10.2 kWh/m3 Natural gas heating efficiency: 105 % Cost savings: -x € 1250 /m3 = € 15,686 per year Maximum...

Heat recovery systems for... Hot air The Air-Cooled Aftercooler (ACA) is an air/air heat exchanger. Process air is cooled in a cross-flow process, whereby ambient air is heated via a thermal energy exchange. In terms of a medium supply, only an electrical connection for the fan is needed. At an ambient temperature of +20°C, for example, the process air flowing into the cooler can be cooled down from +150°C to +30°C. The ACA offers particular advantages when it comes to the pneumatic conveying of temperature-sensitive bulk materials. Furthermore, should a production hall need to be heated during...

Technical specifications: Heat recovery systems... ...for blowers Hot air Hot water Model *) With welded counterflange (included in scope of delivery) Savings calculation example for ACA 350 (production hall heating) Savings calculation example for WRN 170 (supplementary heating) Blower (37 kW) Flow rate: 30 m3/min Pressure differential: 600 mbar * Calculation as per rotary screw compressors for fuel oil heating * Calculation as per rotary screw compressors for fuel oil heating Blower (37 kW) Flow rate: Pressure differential: Inlet temperature: Discharge temperature: Air heating capacity: Process...

More compressed air for less energy The world is our home As one of the world’s largest manufacturers of compressors, blowers and compressed air systems, KAESER KOMPRESSOREN is represented throughout the world by a comprehensive network of wholly owned subsidiaries and authorised distribution partners in over 140 countries. By offering innovative, efficient and reliable products and services, KAESER KOMPRESSOREN’s experienced consultants and engineers work in close partnership with customers to enhance their competitive edge and to develop progressive system concepts that continuously push the...