What is the meaning of the no heat accumulation ?

[ozy99]

What is the meaning of the "no heat accumulation" ?

What is the meaning of the "no heat accumulation" ?and how it affects the fluid in the storage tank and the water being heated in the pipe inside the tank?

thanks

 

[Borek]

I would guess it means liquid is kept at constant temperature. But that's just a guess. Can you give some details about the context?