Create Rule5-44.md #1600
Create Rule5-44.md #1600
Conversation
KarenWGard
requested review from
JasonGlazer,
supriyagoel,
weilixu,
claperle and
JacksonJ-KC
| **Rule ID:** 5-44 | ||
| **Rule Description:** Space Conditioning Categories. Space conditioning categories used to determine applicability of the envelope requirements in Tables G3.4-1 through G3.4-8 shall be the same as in the proposed design. | ||
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| Exception: Envelope components of the HVAC zones that are semiheated in the proposed design must meet conditioned envelope requirements in Tables G3.4-1 through G3.4-8 if, based on the sizing runs, these zones are served by a baseline system with sensible cooling output capacity 5 Btu/h·ft2 of floor area, or with heating output capacity greater than or equal to the criteria in Table G3.4-9, or that are indirectly conditioned spaces. |
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symbol did not come through fomr greater than or equal, maybe write it out instread then
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| Exception: Envelope components of the HVAC zones that are semiheated in the proposed design must meet conditioned envelope requirements in Tables G3.4-1 through G3.4-8 if, based on the sizing runs, these zones are served by a baseline system with sensible cooling output capacity 5 Btu/h·ft2 of floor area, or with heating output capacity greater than or equal to the criteria in Table G3.4-9, or that are indirectly conditioned spaces. | ||
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| **Rule Assertion:** Baseline baseline equals proposed |
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Not sure if this matters but this is not always the case, should this be something different then?
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| - Get surface conditioning category dictionary for P_RMD: ```scc_dictionary_p = get_surface_conditioning_category(P_RMD)``` | ||
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| - For each building segment in the Baseline model: ```for building_surface_b in B_RMD...surfaces:``` |
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The description does not appear match the python. This is for each surface in the baseline model.
| - if the surface does not have the same surface conditioning category in the proposed and baseline, need to check if the exception applies: ```if scc_dictionary_b[building_surface_b.id] != scc_dictionary_p[building_surface_b.id]:``` | ||
| - according to the exception, if the surface is semi-heated ("SEMI-EXTERIOR") in the proposed design, it might be classified as fully-conditioned in the baseline, if, according to sizing runs, the zone is served by HVAC equipment that meets the requirements of a fully-conditioned space. The function get_surface_conditioning_category runs these checks, so we just need to check the conditioning types. First, check whether the proposed conditioning type is SEMI-EXTERIOR: ```if scc_dictionary_p[building_surface_b.id] == "SEMI-EXTERIOR":``` | ||
| - if the baseline is NOT one of the fully-conditioned surface types ("EXTERIOR MIXED", "EXTERIOR RESIDENTIAL", "EXTERIOR NON-RESIDENTIAL"), add this surface ID to the list of non compliant surface ids: ```if !(scc_dictionary_b[building_surface_b.id] in ["EXTERIOR MIXED", "EXTERIOR RESIDENTIAL", "EXTERIOR NON-RESIDENTIAL"]: non_compliant_surface_ids.append(building_surface_b.id)``` | ||
| - Otherwise, the exception is not met, add the id of this surface to the list of non compliant surface ids: ```else: non_compliant_surface_ids.append(building_surface_b.id)``` |
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I recommend that we discuss this on the RDS call.
I think the logic should be that we cycle through all of the SEMI-EXTERIOR surfaces in the proposed design. Check to see if they are classed as CONDITIONED/INDIRECTLY conditioned in the baseline. If they are classed as CONDITIONED/INDIRECTLY in the baseline then we need to check that the baseline thermal properties meet the conditioned envelope requirements in Tables G3.4-1 through G3.4-8. Perhaps this RDS should really just be an update to the RDS that checks that the building meets baseline building envelope requirements in Tables G3.4-1 through G3.4-8 as opposed to being a separate RDS.
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