heating capacity offset not 0, ResStock v2.2.4

asked 2021-02-01 04:01:14 -0500

sashadf1 gravatar image

Hi all,

I am using ResStock v2.2.4, EnergyPlus v9.2, and OS v2.9.0.

I am trying to represent the Daikin 3MXL 3-port 2-ton rated heat pump in Maine.

On Daikin's submittal sheet, the rated cooling capacity equals the rated heating capacity:

image description

I specified in hvac_sizing.rb that the heating capacity offset should be zero: image description

However, in the ResStock output, the heating capacity clearly does not equal the cooling capacity:

image description

Any ideas why this is happening?

In options_lookup tsv, I have created a new row entry for the 3MXL and designated the following fields:

  1. heat_pump_capacity=2
  2. heating_capacity_offset=0
  3. min_cooling_capacity=0.44, max_cooling_capacity=1.25
  4. min_heating_capacity=0.33, max_heating_capacity=1.71
  5. supplemental_capacity=autosize

Either way, I am getting really large heating unmet hours for this equipment because some houses simulated probably require greater total capacity than 2-tons, so it is possible I should just scrap this equipment entirely and rely on ResStock's default equipment.

edit retag flag offensive close merge delete


Similar thing happened trying to model Daikin 4MXL

sashadf1 gravatar image sashadf1  ( 2021-02-01 05:52:43 -0500 )edit