Re: Enquiry on the Component Type 668

[David Bradley <bradley@xxxxxxxxxxxx>]

Dear Howard

> First of all, there are "heating control" and "cooling control" inputs for 
> the component, does it mean that the heat pump can only operate in either 
> mode, but not simultaneously supplying chilled water and hot water?
> If so, is there is any component which can support simultaneous heating 
> and cooling?

Type668 is intended to model a heat pump that operates in either heating or 
cooling mode. Apart from the fact that one fluid stream is heated while the 
other is cooled, the component is not intended to model a heat pump that 
can heat and cool simultaneously. To model such a system, I would suggest 
that you add two such heat pumps in either series or parallel and control 
them appropriately to obtain whatever effect you want on the fluid streams.

> Secondly, what are the "source" and "load" in the parameters page exactly 
> mean? I find that during "cooling" mode, the chilled water should be 
> the  "load", but while "heating" mode. the chilled water should be the 
> "source". Is it a bit contradicting?

In heating mode, the "load" fluid refers to the stream that is being 
heated. In cooling mode, the "load" stream is the one that is being cooled.
Kind regards,
  David

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