Energy technology deals with different methods and procedures for the generation, distribution, storage, and usage of energy. Therefore, possible applications for centrifugal pumps in energy technology comprise a wide spectrum.
Energy technology deals with different methods and procedures for the generation, distribution, storage, and usage of energy. Therefore, possible applications for centrifugal pumps in energy technology comprise a wide spectrum. Apart from classical applications such as heating, heat distribution, and cooling of aggregates, this includes applications such as energy storage systems, biogas plants, heat recovery systems and fuel cells.
The technical challenges are diverse: the required volume flow rates, pressures, and the requirements for materials and sealing systems all depend on the individual application.
EDUR-centrifugal pumps for energy technology are characterized by a compact pump design with axial thrust-free, open or closed impellers. A large portion of the radial forces is decreased by special EDUR diffuser elements. This positively influences the lifetime of the mechanical seal, bearing, and drive motor.
Due to very low NPSH values, fluids which are close to their boiling point can be safely supplied. Centrifugal pumps from EDUR are thus able to supply steam-laden fluids and offer a high degree of operational safety. EDUR-magnetically coupled pumps are used for fluids, which are classified as environmentally hazardous or toxic. Differences in used mechanical seal systems are determined by the corresponding applications. EDUR-centrifugal pumps are constructed as close-coupled or inline pumps. The application can require both single stage or multistage design.
Water vapour is used in various industrial processes, for example for heating purposes, the drive of turbines, cleaning processes, sterilisation or for air humidification. Water vapour with more than 100°C and a pressure level above the atmospheric pressure is generated in closed steam boilers or pressure pipe systems. In order to feed the condensate back into the system, multistage centrifugal pumps are mainly used working against high pressure and temperatures. The pumps are installed either in horizontal or vertical design. In order to cool down the condensate again, single stage close-coupled and multistage centrifugal pumps are used. Requirements to the pumps are low NPSH values, optimally matched sealing systems and corresponding materials.
The term district heating mainly refers to the heat supply to buildings for heating and warm water. Heat is centrally generated and distributed by pumps via pipe systems to the points of delivery. In district heating supply, mainly centrifugal pumps are used, which pump the pressurized fluid with temperatures of almost 100°C to the delivery station of the consumer and back to the district heating station. The application is characterized by closed circuits with, in part, very long pipe routes. The fluid contains corresponding corrosion protection agents in order to protect the pipes and valves. The pumps should be easyly controllable. They are executed as a block design, in horizontal and vertical installation or also as a classical base plate pump.
Centrifugal pumps in cogeneration plants and waste incineration plants convey various liquids with different temperature and pressure ranges. They are very often used for the transport of heat carriers and coolants, gases and flammable fluids. Good controllability of pumps also plays an important role here. Due to partly high requirements to the material and the electrical protection of the aggregates, stainless steels are often used as well as grey cast iron and spheroidal graphite iron. The pumps are often sealed by mechanical seals in double design with barrier pressure or with magnetic couplings.
A gas motor is a combustion engine often operating on petrol. By using various gases such as biogas, LNG or hydrogen, for example, the gas engine is more environmentally friendly than a combustion engine for petrol and diesel. When the gaseous fuels are generated by biogas plants or the power-to-gas process, these engines are even more sustainable during their combustion process. In order to ensure safe cooling of the gas engines, centrifugal pumps with very low NPSH values are used. The characteristic curves of the pumps should allow good controllability. Due to lack of space, inline pumps are often used. Normally, a single mechanical seal is sufficient to seal the pump. In order to protect turbines and combustion engines against overheating, regulated cooling circuits are used mostly with a glycol mixture.
A diesel engine is a combustion engine, which use oils and bio-oils derived from petroleum as fuel. The heat resulting from the combustion is discharged via a cooling water circuit. Here, centrifugal pumps supply the cooling water in the closed circuit cooling via a heat exchanger. EDUR-centrifugal pumps are mostly executed in single stage design in a horizontal or vertical installation. The characteristic curves of the pumps should allow for good control. Due to a lack of space, inline pumps are often used. Normally, a single mechanical seal is sufficient to seal the pump.
Installed compressors on gas tankers must be operated 24 hours a day for the cooling and compression of the liquefied gases. Independent of the outside temperatures (-30°C in the Bering Sea up to +40°C at the equator), cooling of the compressors must be ensured. A water-glycol mixture in large, closed circuits is supplied with special vertical inline pumps matched for marine technology. The pumps mostly require relevant approvals by DNVGL, Germanischer Lloyd or further classification companies.