Air-Water heat pump in EnergyPlus?

asked 2 years ago

DPalma
82 ●1 ●6

updated 2 years ago

Aaron Boranian

14375 ●90 ●25 http://bigladdersoftware.com/

Hi!,

I'm simulating a building that uses an air-water heat-pump to produce hot water. The Fan-coil and UTAs use hot water but is impossible to associate my heat pump with these systems.

The solution I have found is to use a boiler with efficiency 1 and calculate the real consumption using the COP of the heat pump.

The problem is that I need use Jeplus to calibrate the COP but its not an input variable.

Is there a way to define a hot water production system to which I can introduce the COP of my heat pump?

Thank you!

answered 2 years ago

shorowit

12525 ●219 ●9 https://www.nrel.gov/b...

You can use the HeatPump:PlantLoop:EIR:Cooling and HeatPump:PlantLoop:EIR:Heating objects for an air-to-water heat pump. From the documentation:

Beginning with version 9.1, an EIR-formulated heat pump model was added. This heat pump can be operated as a water-source object with the source-side connected to another plant loop, or as an air-source object with the source-side interacting with the outdoor air. This formulation allows the user to enter curves for specifying the capacity and energy usage in a more generic way, allowing the curves to be applicable to a wide variety of components. With the original equation fit model, the curve form was locked in to a specific set of linear coefficients. With the new form, the curve can be a quadratic function of temperatures, or an even more generic lookup table.

The implementation of this capability occurred here.

link

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