Re: [TRNSYS-users] Type 56 with Type 927

[Jeff Thornton <thornton@tess-inc.com>]

Orib,

I see from your image that you have 4 thermostats that take information from the building model but don’t have any outputs being used.  What is turning on and off the heat pump and the circulating pumps?

When done correctly, the building should be in temperature level control and there are no “loads” being calculated by the building but rather heating and cooling supplied by the ventilation air inputs from your fan coils.  A controller should watch the tank temperature and turn the heat pump on and off based on the desired temperature for heating/cooling.  The zone thermostats will then turn on and off the pumps circulating water from the tank to the fan coils, and the fan coils themselves, based on the zone temperatures.

If you haven’t already studied it, there is a nice building example that demonstrates how to set up a building for temperature level control.

Jeff 

> On Nov 27, 2021, at 6:18 AM, Orib Zayed via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:
> 
> 
> Greetings,
> 
> I have a GSHP heating and cooling system in a multizone building, and the system has been alternating between heating and cooling mode, but the temperatures inside the building and the heat pump temperatures are not controlled. I was surprised that the heat pump temperature in the summer was around -20°C, which is reflected in the building. The low temperature in the building is the opposite of what I want. In the heating season the system is quite good but the big problem is the cooling season. What is the solution to this problem?
> 
> Note that I already have 5 heat pumps, but they work as needed in the actual system. I would like to know how the building loads are connected with the number of heat pumps ''on input #8 at type 927 (heat pump)''.
> 
> I have another question about the specifications of the heat pump, where the catalog of my heat pump set the water heating limit to 65 degrees Celsius and cooling to -10 degrees Celsius, while in the program it can reach 130 degrees Celsius in heating and -70 in cooling ''without any loads'', can it be modified or. is it not It has an effect on the results. 
> Note: When applied to a load, outlet heat pumps temperatures return to a reasonable natural situation.
> 
> Sorry for the long post, thank you very much

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