High Pressure Pumps for Maximum Energy Efficiency in Desalination

High Pressure Pumps for Maximum Energy Efficiency in Desalination Georg Herborg, Director of Innovation Danfoss High Pressure Pumps Classified as Business Pump Performance Curves – new views Energy Efficiency vs. Flow KEY TAKE AWAYS: For Axial Piston Pumps: Pressure and Flow are DECOUPLED! Will deliver same flow regardless of system pressure. Variation in Flow and Pressure, has negligible affect on Energy Efficiency Energy Efficiency vs. Pressure New approach to design plants New approach to run plants …LET’S EXPLORE! Standard systems calculations are based on static scenarios Constant… electricity price permeate production recovery rate best efficiency point pump energy efficiency Etc. …and this will impact the strategies for system operation Classified as Business SWRO Simulation Model Membrane Performance Data: Perm Prod.: 10. CMD Recovery Rate: 45% Feed Conc.: 3% P / P Memb. 60 / 1 bar AP pump, CF pump, ERD Performance Data: From Industry Typical Units Electric Motors, VFD’s: Typical constant Energy Efficiency Classified as Business SWRO System Simulation Model Define Target CMD Divide Day in 24 time slots and distribute production evenly Determining best Recovery Rate for each time slot, and calculating SEC Move small amounts of production from one day to another Use predefine electricity cost throughout the day and calculate total cost in € Classified as Business Storing excess energy is costly (CAPEX+OPEX) Don’t Store Energy that you can USE DIRECTLY!! Shifting energy demand is key! …and will become increasingly important! The Duck of the Electrical Grid Soler(PV) DUCK challenge Too much is (almost) as critical as too little Extensive solar PV electricity is challenging the base load electricity provider When you have excess (renewable) energy, Don’t store it!! Conclusions Axial Piston Pump Technology enables (requires?) a different view on building and operating SWRO plants Axial Piston Pump Technology in SWRO plants offers significant energy and cost savings Usual tradeoff between efficiency and water cleanliness can be mitigated by Axial Piston Pump SWRO plant benefits are amplified when conditions change Modelling Applications/Systems provides new insights and triggers new innovative ideas SWRO plants with APP technology, can play a role in balancing power grid load, by efficiently moving production to low grid load time (and cheap electricity price!) time slots Power-to-Water! Price AP-Pump RO system can exploit varying Electricity Prices, and reduce cost/m3 Classified as Business yrevoceR CES Pressure Efficiency Feed HPP.