PETpla.net Insider 05 / 2016

COMPRESSORS 22 PET planet insider Vol. 17 No. 05/16 www.petpla.net Roof-top cooler The cooling water for the Belliss & Morcom compressor is provided by a system which was also designed by Gardner Denver. A redundant arrange- ment of two energy saving pumps with just 5.5kW of drive power (with a cool- ing power of 300kW) is installed on a skid. An energy-saving roof-top cooler takes care of cooling with speed- controlled fans driven via modern EC motors. These are regulated via the intake temperature and thereby adjust their power to the outside tempera- ture. An automatic summer/winter control adjusts the intake temperature to the current climatic conditions. Heat recovery The optimum integration of the compressor in the temperature-con- trolled processes is crucial for the effi- ciency of the compressed air genera- tion. The system in Stockach is said to ensure optimum conditions for this, as the entire plant was planned and built from scratch. Burgmeier explains: “The compression of the air produces waste heat, which we use for other processes.” Therefore, along with the piston machine, Gardner Denver sup- plied a heat exchanger. The volume flow can be adjusted via a control valve so that the discharge tempera- ture is kept as high as possible, i.e., at approximately 50°C. The key component for heat recov- ery is a water tank with a capacity of 10m 3 , which can be used as a source of hot water or, as an energy reservoir via the heat exchanger. Both the cool- ing circuit and the heat recovery are also controlled via central PLC of the compressed air station. Networking The Belliss & Morcom machine is connected to the general 7 bar plant network at the Stockach plant via a pressure reducer, so that it can also feed into this network in the event of an emergency. The 40 bar network is also redundantly designed: shortly, Gardner Denver will be installing a second piston compressor of the same type together with the second bottling line at the Stockach plant. This will act as a backup system to safeguard the compressed air supply for the PET bottle production, and in the truest sense of the word, also supply sufficient air for future expan- sion. www.gardnerdenver.com/industrials F.l.t.r.: Robert Kupka and Dirk Tenbrink, Gardner Denver, plus Berthold Burgmeier, Gropper, in front of the new Belliss & Morcom piston compressor WH H3N at Stockach The most efficient version of the W-series, used by Gropper, has a control range of 530 to 1,800m 3 /h (30 to 100%). Energy-saving roof-top cooler with speed-controlled fans