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Fix issue 743, adding chilled water system points back #752

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a9dee61
returning return/supply entering/leaving temp
gtfierro Jan 1, 2026
4df1207
add example
gtfierro Jan 1, 2026
e373d63
fixing example
gtfierro Jan 1, 2026
e846b8c
fix test for supply/discharge
gtfierro Jan 1, 2026
50c1d9d
Merge branch 'master' into fix-issue-743
gtfierro Mar 19, 2026
b71e828
Merge remote-tracking branch 'origin/master' into fix-issue-743
gtfierro Mar 19, 2026
d0c3c93
Merge branch 'fix-issue-743' of github.com:BrickSchema/Brick into fix…
gtfierro Mar 19, 2026
f6a5787
Merge remote-tracking branch 'origin/master' into fix-issue-743
gtfierro Apr 14, 2026
eb06085
Fix deprecated water setpoint hierarchy
gtfierro Apr 14, 2026
b609d8b
make test more general
gtfierro Apr 14, 2026
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6 changes: 4 additions & 2 deletions bricksrc/definitions.csv
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Original file line number Diff line number Diff line change
Expand Up @@ -382,7 +382,7 @@ https://brickschema.org/schema/Brick#Entering_Medium_Temperature_Hot_Water_Tempe
https://brickschema.org/schema/Brick#Entering_Medium_Temperature_Hot_Water_Temperature_Load_Shed_Status,,
https://brickschema.org/schema/Brick#Entering_Medium_Temperature_Hot_Water_Temperature_Low_Reset_Setpoint,,
https://brickschema.org/schema/Brick#Entering_Medium_Temperature_Hot_Water_Temperature_Sensor,Measures the temperature of medium-temperature hot water entering a hot water system,
https://brickschema.org/schema/Brick#Entering_Water,Water that is entering a piece of equipment or system,
https://brickschema.org/schema/Brick#Entering_Water,Water that is entering a piece of equipment within a water system; contrasts with returning water which is specifically water coming back from the load side of the system.,
https://brickschema.org/schema/Brick#Entering_Water_Differential_Pressure_Deadband_Setpoint,Sets the size of a deadband of differential pressure of entering water,
https://brickschema.org/schema/Brick#Entering_Water_Differential_Pressure_Integral_Time_Parameter,,
https://brickschema.org/schema/Brick#Entering_Water_Differential_Pressure_Proportional_Band_Parameter,,
Expand Down Expand Up @@ -632,7 +632,7 @@ https://brickschema.org/schema/Brick#Leaving_Medium_Temperature_Hot_Water_Temper
https://brickschema.org/schema/Brick#Leaving_Medium_Temperature_Hot_Water_Temperature_Load_Shed_Status,,
https://brickschema.org/schema/Brick#Leaving_Medium_Temperature_Hot_Water_Temperature_Low_Reset_Setpoint,,
https://brickschema.org/schema/Brick#Leaving_Medium_Temperature_Hot_Water_Temperature_Sensor,Measures the temperature of medium-temperature hot water supplied by a hot water system,
https://brickschema.org/schema/Brick#Leaving_Water,Water that is leaving a piece of equipment or system,
https://brickschema.org/schema/Brick#Leaving_Water,Water that is leaving a piece of equipment within a water system; contrasts with supply water which is water being supplied to the load side of the system.,
https://brickschema.org/schema/Brick#Leaving_Water_Differential_Pressure_Deadband_Setpoint,Sets the size of a deadband of differential pressure of leaving water,
https://brickschema.org/schema/Brick#Leaving_Water_Differential_Pressure_Integral_Time_Parameter,,
https://brickschema.org/schema/Brick#Leaving_Water_Differential_Pressure_Proportional_Band_Parameter,,
Expand Down Expand Up @@ -979,6 +979,7 @@ https://brickschema.org/schema/Brick#Return_Air_Temperature_Setpoint,"The target
https://brickschema.org/schema/Brick#Return_Damper,A damper that modulates the flow of return air,
https://brickschema.org/schema/Brick#Return_Fan,Fan moving return air -- air that is circulated from the building back into the HVAC system,
https://brickschema.org/schema/Brick#Return_Heating_Valve,A valve installed on the return side of a heat exchanger,
https://brickschema.org/schema/Brick#Return_Water,Water returning from the load-side of a water system,
https://brickschema.org/schema/Brick#Reversing_Valve,,
https://brickschema.org/schema/Brick#Rooftop_Unit,"Packaged air conditioner mounted on a roof, the conditioned air being discharged directly into the rooms below or through a duct system.",
https://brickschema.org/schema/Brick#Room_Air,,
Expand Down Expand Up @@ -1093,6 +1094,7 @@ https://brickschema.org/schema/Brick#Supply_Air_Temperature_Setpoint_Limit,,
https://brickschema.org/schema/Brick#Supply_Air_Temperature_Step_Parameter,,
https://brickschema.org/schema/Brick#Supply_Air_Velocity_Pressure_Sensor,,
https://brickschema.org/schema/Brick#Supply_Fan,Fan moving supply air -- air that is supplied from the HVAC system into the building,
https://brickschema.org/schema/Brick#Supply_Water,Water being supplied to the load-side of a water system,
https://brickschema.org/schema/Brick#Surveillance_Camera,,
https://brickschema.org/schema/Brick#Switch,A switch used to operate all or part of a lighting installation,
https://brickschema.org/schema/Brick#Switch_Status,Status of a switch,
Expand Down
17 changes: 9 additions & 8 deletions bricksrc/deprecations.py
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Expand Up @@ -474,7 +474,8 @@
"replace_with": BRICK.Leaving_Hot_Water_Flow_Setpoint,
"version": "1.3.0",
RDFS.subClassOf: [
BRICK.Supply_Water_Temperature_Sensor,
BRICK.Supply_Water_Flow_Setpoint,
BRICK.Hot_Water_Flow_Setpoint,
],
},
BRICK.Hot_Water_Supply_Temperature_Sensor: {
Expand Down Expand Up @@ -602,34 +603,35 @@
"replace_with": BRICK.Leaving_Condenser_Water_Temperature_Setpoint,
"version": "1.3.0",
RDFS.subClassOf: [
BRICK.Supply_Water_Temperature_Sensor,
BRICK.Leaving_Condenser_Water_Temperature_Setpoint,
],
},
BRICK.Discharge_Condenser_Water_Temperature_Setpoint: {
"mitigation_message": "Swapped supply/return for entering/leaving with water-related points",
"replace_with": BRICK.Leaving_Condenser_Water_Temperature_Setpoint,
"version": "1.3.0",
RDFS.subClassOf: [
BRICK.Discharge_Water_Temperature_Sensor,
BRICK.Leaving_Condenser_Water_Temperature_Setpoint,
],
},
BRICK.Supply_Hot_Water_Temperature_Setpoint: {
"mitigation_message": "Swapped supply/return for entering/leaving with water-related points",
"replace_with": BRICK.Leaving_Hot_Water_Temperature_Setpoint,
"version": "1.3.0",
RDFS.subClassOf: [
BRICK.Supply_Water_Temperature_Sensor,
BRICK.Leaving_Hot_Water_Temperature_Setpoint,
BRICK.Hot_Water_Temperature_Setpoint,
],
},
BRICK.Discharge_Hot_Water_Temperature_Setpoint: {
"mitigation_message": "Swapped supply/return for entering/leaving with water-related points",
"replace_with": BRICK.Leaving_Hot_Water_Temperature_Setpoint,
"version": "1.3.0",
RDFS.subClassOf: [
BRICK.Discharge_Water_Temperature_Sensor,
BRICK.Leaving_Hot_Water_Temperature_Setpoint,
BRICK.Hot_Water_Temperature_Setpoint,
],
},

BRICK.Electric_Current: {
"version": "1.4.4",
"mitigation_message": "Brick-defined quantity 'Electric_Current' is deprecated. Use the equivalent QUDT quantity 'qudt:QuantityKind/ElectricCurrent' directly.",
Expand Down Expand Up @@ -670,7 +672,7 @@
"mitigation_message": "Brick-defined quantity 'Atmospheric_Pressure' is deprecated. Use the equivalent QUDT quantity 'qudt:QuantityKind/AtmosphericPressure' directly.",
"replace_with": QUDTQK.AtmosphericPressure,
},
BRICK.Gauge_Pressure: {
BRICK.Gauge_Pressure: {
"version": "1.4.4",
"mitigation_message": "Brick-defined quantity 'Gauge_Pressure' is deprecated. Use the QUDT quantity 'qudt:QuantityKind/Pressure' and indicate contextually that it is gauge pressure if necessary.",
"replace_with": QUDTQK.Pressure,
Expand Down Expand Up @@ -725,7 +727,6 @@
"mitigation_message": "Brick-defined quantity 'Radioactivity_Concentration_Sensor' is deprecated. Use Air_Quality_Sensor instead, or the provided sensor class for the specific kind or source of radioactivity (e.g. Radon gas)",
"replace_with": BRICK.Air_Quality_Sensor,
},

BRICK.Phasor: {
"version": "1.4.4",
"mitigation_message": "Brick-defined quantity 'Phasor' is deprecated.",
Expand Down
86 changes: 78 additions & 8 deletions bricksrc/sensor.py
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Expand Up @@ -1924,7 +1924,7 @@
TAG.Sensor,
],
},
}
},
},
"Domestic_Hot_Water_Temperature_Sensor": {
"tags": [
Expand Down Expand Up @@ -2040,6 +2040,30 @@
},
},
},
"Return_Hot_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Hot,
TAG.Return,
],
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Return_Hot_Water,
},
"Supply_Hot_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Hot,
TAG.Supply,
],
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Supply_Hot_Water,
},
"Chilled_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
Expand All @@ -2066,6 +2090,23 @@
BRICK.Water_Differential_Temperature_Sensor
],
},
"Differential_Entering_Leaving_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Chilled,
TAG.Leaving,
TAG.Entering,
TAG.Differential,
],
BRICK.hasSubstance: [
BRICK.Leaving_Chilled_Water,
BRICK.Entering_Chilled_Water,
],
BRICK.hasQuantity: QUDTQK.Temperature,
},
"Entering_Chilled_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
Expand All @@ -2090,22 +2131,29 @@
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Leaving_Chilled_Water,
},
"Differential_Entering_Leaving_Water_Temperature_Sensor": {
"Return_Chilled_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Chilled,
TAG.Leaving,
TAG.Entering,
TAG.Differential,
TAG.Return,
],
BRICK.hasSubstance: [
BRICK.Leaving_Chilled_Water,
BRICK.Entering_Chilled_Water,
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Return_Chilled_Water,
},
"Supply_Chilled_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Chilled,
TAG.Supply,
],
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Supply_Chilled_Water,
},
},
},
Expand Down Expand Up @@ -2155,6 +2203,28 @@
},
},
},
"Return_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Return,
],
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Return_Water,
},
"Supply_Water_Temperature_Sensor": {
"tags": [
TAG.Point,
TAG.Sensor,
TAG.Temperature,
TAG.Water,
TAG.Supply,
],
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Supply_Water,
},
"Collection_Basin_Water_Temperature_Sensor": {
BRICK.hasQuantity: QUDTQK.Temperature,
BRICK.hasSubstance: BRICK.Collection_Basin_Water,
Expand Down
19 changes: 15 additions & 4 deletions bricksrc/substances.py
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Expand Up @@ -30,15 +30,15 @@
},
"Formaldehyde": {},
"Methane": {},
"CO": {}, # Carbon Monoxide
"CO2": {}, # Carbon Dioxide
"CO": {}, # Carbon Monoxide
"CO2": {}, # Carbon Dioxide
"Natural_Gas": {},
"Ammonia": {},
"NO2": {}, # Nitrogen Dioxide
"NO2": {}, # Nitrogen Dioxide
"Ozone": {},
"Radon": {},
"Steam": {},
"TVOC": {}, # Total Volatile Organic Compounds
"TVOC": {}, # Total Volatile Organic Compounds
},
},
"Liquid": {
Expand All @@ -61,6 +61,12 @@
"Leaving_Chilled_Water": {
"parents": [BRICK.Leaving_Water],
},
"Return_Chilled_Water": {
"parents": [BRICK.Return_Water],
},
"Supply_Chilled_Water": {
"parents": [BRICK.Supply_Water],
},
},
},
"Collection_Basin_Water": {},
Expand Down Expand Up @@ -88,12 +94,17 @@
},
"Potable_Water": {},
"Leaving_Water": {},
"Return_Water": {},
"Supply_Water": {},
"Entering_Water": {},
"Hot_Water": {
SKOS.narrower: {
"Entering_Hot_Water": {
"parents": [BRICK.Entering_Water],
},
"Return_Hot_Water": {
"parents": [BRICK.Return_Water],
},
"Leaving_Hot_Water": {
"parents": [BRICK.Leaving_Water],
},
Expand Down
47 changes: 47 additions & 0 deletions examples/chiller-system/chiller-plant-haystack.ttl
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@@ -0,0 +1,47 @@
# modeling the system in https://project-haystack.org/doc/docHaystack/chilled-water-plant.svg
@prefix : <http://example.com/chiller-plant-haystack#> .
@prefix brick: <https://brickschema.org/schema/Brick#> .
@prefix unit: <http://qudt.org/vocab/unit/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

<http://example.com/chiller-plant-haystack> a owl:Ontology ;
owl:imports <https://brickschema.org/schema/1.4/Brick> .

:plant a brick:Chilled_Water_System ;
brick:hasPart :ct, :chiller .
# currently can't put points on the system itself in Brick
# brick:hasPoint :plant-chilled-water-supply-temp, :plant-chilled-water-return-temp .
# :plant-chilled-water-supply-temp a brick:Supply_Chilled_Water_Temperature_Sensor ;
# rdfs:label "Plant's temp sensor for the leaving chilled water (supply to load)" ;
# brick:hasUnit unit:DEG_C .
# :plant-chilled-water-return-temp a brick:Return_Chilled_Water_Temperature_Sensor ;
# rdfs:label "Plant's temp sensor for the entering chilled water (return from load)" ;
# brick:hasUnit unit:DEG_C .

:ct a brick:Cooling_Tower ;
brick:hasPoint :ct-cond-water-leave-temp, :ct-cond-water-enter-temp .
:ct-cond-water-leave-temp a brick:Leaving_Condenser_Water_Temperature_Sensor ;
rdfs:label "Condenser Water Leave Temp Sensor, measured at cooling tower's condenser" ;
brick:hasUnit unit:DEG_C .
:ct-cond-water-enter-temp a brick:Entering_Condenser_Water_Temperature_Sensor ;
rdfs:label "Condenser Water Enter Temp Sensor, measured at cooling tower's condenser" ;
brick:hasUnit unit:DEG_C .

:chiller a brick:Chiller ;
brick:hasPoint :cond-water-enter-temp, :cond-water-leave-temp,
:chilled-water-return-temp, :chilled-water-supply-temp .
:chilled-water-return-temp a brick:Return_Chilled_Water_Temperature_Sensor ;
rdfs:label "Chilled Water Enter Temp Sensor (return from load)" ;
brick:hasUnit unit:DEG_C .
:chilled-water-supply-temp a brick:Supply_Chilled_Water_Temperature_Sensor ;
rdfs:label "Chilled Water Leave Temp Sensor (supply to load)" ;
brick:hasUnit unit:DEG_C .
:cond-water-enter-temp a brick:Entering_Condenser_Water_Temperature_Sensor ;
rdfs:label "Condenser Water Enter Temp Sensor, measured at chiller" ;
brick:hasUnit unit:DEG_C .
:cond-water-leave-temp a brick:Leaving_Condenser_Water_Temperature_Sensor ;
rdfs:label "Condenser Water Leave Temp Sensor, measured at chiller" ;
brick:hasUnit unit:DEG_C .
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