10000 heating system sizing for shared heating affected by envelope upgrade · Issue #210 · Test-Cloned-Org/resstock · GitHub
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heating system sizing for shared heating affected by envelope upgrade #210

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willf opened this issue Feb 12, 2025 · 0 comments
Open

heating system sizing for shared heating affected by envelope upgrade #210

willf opened this issue Feb 12, 2025 · 0 comments
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@willf
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willf commented Feb 12, 2025

In EUSS AMY2018 results, the primary heating system size is reduced by the Basic Envelope upgrade and the Enhanced Envelope upgrade when the heating system is:

build_existing_model.heating_fuel  build_existing_model.hvac_heating_efficiency 
Electricity                        Shared Heating

Here are their differences (just size_heating_system_primary_k_btu_h is different):
baseline

             upgrade_costs.size_heating_system_primary_k_btu_h  upgrade_costs.size_heating_system_secondary_k_btu_h  upgrade_costs.size_heat_pump_backup_primary_k_btu_h
building_id                                                                                                                                                             
12138                                                     4.79                                                0.0                                                  0.0  
13909                                                     9.72                                                0.0                                                  0.0  
20242                                                     7.26                                                0.0                                                  0.0  
31899                                                    15.66                                                0.0                                                  0.0  
55736                                                     8.57                                                0.0                                                  0.0  
...                                                        ...                                                ...                                                  ...  
514416                                                   25.44                                                0.0                                                  0.0  
514830                                                   23.43                                                0.0                                                  0.0  
532502                                                    9.62                                                0.0                                                  0.0  
548026                                                   12.23                                                0.0                                                  0.0  
549042                                                   15.40                                                0.0                                                  0.0  

[62 rows x 3 columns]

upgrade

             upgrade_costs.size_heating_system_primary_k_btu_h  upgrade_costs.size_heating_system_secondary_k_btu_h  upgrade_costs.size_heat_pump_backup_primary_k_btu_h
building_id                                                                                                                                                             
12138                                                     3.91                                                0.0                                                  0.0  
13909                                                     8.04                                                0.0                                                  0.0  
20242                                                     4.69                                                0.0                                                  0.0  
31899                                                    11.17                                                0.0                                                  0.0  
55736                                                     7.10                                                0.0                                                  0.0  
...                                                        ...                                                ...                                                  ...  
514416                                                   16.67                                                0.0                                                  0.0  
514830                                                   18.87                                                0.0                                                  0.0  
532502                                                    8.74                                                0.0                                                  0.0  
548026                                                    9.95                                                0.0                                                  0.0  
549042                                                    9.93                                                0.0                                                  0.0

I do not see cooling system size difference between the baseline and envelope upgrades.

I think there has been previous effort to fix HVAC sizing to baseline level when an upgrade does not change the HVAC system, is this shared heating option an oversight?

Source: NREL on 2023-09-25.
@willf willf added the bug Something isn't working label Feb 12, 2025
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