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[EnergyPlus_Support] Unstable control during thermal charging period with Ice storage tank.

Hi all,

I have composed a model with ice storage tank, but supecious fluctuations of chilled water flow as well as charging performance are detected. The problems are as below:

1. the primary chilled water pump has to be set to continous mode, otherwise the ice tank will never have any charging energy.

2. once this pump is under continous mode, fluctuations of the node parameters come about. For example, chiller evaporator inlet temperature changes from 7C to -5C every timestep. The low temperature tunoff manager has been used in this model. 

Would you please help me find the possible solutions? Thank you all in advance and the idf file named "Thermal energy storage Test" has been uploaded to the files of this group. 


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