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Hi I'm vishal How does the tank supply the demand when it is more than the capacity of the tank?

I'm running steady state and demands are more than tanks capacity, I mean how the Demand is met if capacity of tank is less than demands?

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  • Hello,

    In a steady state simulation, Only the initial water level/ elevation in the tank is considered for hydraulic analysis of the network. No volumetric analysis is done/ considered in Steady State Simulation (No consideration for Tank's Diameter). Hence, a tank is considered as an unlimited source of water at a fixed initial HGL. Hope that answers how tanks with lesser volume/ capacity satisfies more/ higher demands in steady state without any errors/ notifications.

    However, if you want to understand the volumetric fluctuations in the tank, it is advisable that you model it in extended period simulation mode.

    P.S. In order to make sure that the tank capacity is appropriate, the user must perform mass balancing of tanks for a certain demand and then determine the diameter accordingly. For existing tanks in the network, you can modify the Zone Boundary for the existing tank so that the demands in the revised zone will satisfy the mass balancing criteria. As a thumb rule, a tank's capacity (Vol.) is typically 1/3rd of the total demand on to it.

    Happy modelling,

    Regards,

    Tanay

Reply
  • Hello,

    In a steady state simulation, Only the initial water level/ elevation in the tank is considered for hydraulic analysis of the network. No volumetric analysis is done/ considered in Steady State Simulation (No consideration for Tank's Diameter). Hence, a tank is considered as an unlimited source of water at a fixed initial HGL. Hope that answers how tanks with lesser volume/ capacity satisfies more/ higher demands in steady state without any errors/ notifications.

    However, if you want to understand the volumetric fluctuations in the tank, it is advisable that you model it in extended period simulation mode.

    P.S. In order to make sure that the tank capacity is appropriate, the user must perform mass balancing of tanks for a certain demand and then determine the diameter accordingly. For existing tanks in the network, you can modify the Zone Boundary for the existing tank so that the demands in the revised zone will satisfy the mass balancing criteria. As a thumb rule, a tank's capacity (Vol.) is typically 1/3rd of the total demand on to it.

    Happy modelling,

    Regards,

    Tanay

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