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Grundfos FLOW THINKINGEvaluation of temperature and flow.Even the temperature on the secondary site is controlled,therewillis a large variation in the flow.Temperature evaluationFlow variationoC100%m 3 /h608050604040302020010-20600 500 400 300 200 100 0 kWHeat demandFlow temperature primary siteFlow temperature secondary siteReturn temperatureOutdoor temperature0600 500 400 300 200 100 0 kW100 83 67 50 33 17 0 %Heat demandFlow primary siteFlow secondary siteFlow by-pass
Grundfos FLOW THINKINGPumps for mixing loops single pipe systems.Primary siteThe main pumps in the primary site has toovercome the pressure drop in the control valves,heat produc-tion and the distribution net. Due to asignificant flow variation a speed controlled pumpwill be the right choice. A standby pump will supplysafety to the system.Secondary siteThe pump in the mixing loop has to overcome thepressure drop in the secondary site. Due to there isno flow variation a constant speed pump willbe the right choice.Distribution nettHeatproductionMHeatingsystemtMain pumpsMHeatingsystem
Page 1 and 2: Grundfos FLOW THINKINGAir condition
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Page 9 and 10: Grundfos FLOW THINKINGBasic Concept
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Page 13 and 14: Grundfos FLOW THINKINGTertiary Pump
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