From 1c1ed9b67f967598cce0d9fba901bda95481ff13 Mon Sep 17 00:00:00 2001
From: Julien Marrec <julien.marrec@gmail.com>
Date: Tue, 12 May 2020 23:44:18 +0200
Subject: [PATCH] #3976 - OS:Coil:Cooling:DX:TwoSpeed - MinOAT **AND** 'Unit
 Internal Static Air Pressure'

---
 resources/model/OpenStudio.idd | 37 +++++++++++++++++++++++-----------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/resources/model/OpenStudio.idd b/resources/model/OpenStudio.idd
index 6f93607e2f7..8d387f132c7 100644
--- a/resources/model/OpenStudio.idd
+++ b/resources/model/OpenStudio.idd
@@ -15746,6 +15746,15 @@ OS:Coil:Cooling:DX:TwoSpeed,
        \autosizable
        \units m3/s
        \minimum> 0
+  N5 , \field Unit Internal Static Air Pressure
+       \note Enter pressure drop for the unit containing the coil.
+       \note This value is only used to calculate Energy Efficiency Ratio
+       \note (EER), Integrated Energy Efficiency Ratio (IEER), and the
+       \note Standard Rating (Net) Cooling Capacity. This value is not
+       \note used for modeling the evaporator fan during simulations.
+       \type real
+       \units Pa
+       \minimum> 0.0
   A4, \field Air Inlet Node Name
        \type object-list
        \required-field
@@ -15789,7 +15798,7 @@ OS:Coil:Cooling:DX:TwoSpeed,
        \type object-list
        \required-field
        \object-list QuadraticCubicCurves
-  N5, \field Rated Low Speed Total Cooling Capacity
+  N6, \field Rated Low Speed Total Cooling Capacity
        \note gross capacity excluding supply air fan heat
        \note rating point: air entering the cooling coil at 26.7 C dry-bulb/19.4 C wet-bulb, and
        \note air entering the outdoor condenser coil at 35 C dry-bulb/23.9 C wet-bulb
@@ -15798,7 +15807,7 @@ OS:Coil:Cooling:DX:TwoSpeed,
        \autosizable
        \units W
        \minimum> 0
-  N6, \field Rated Low Speed Sensible Heat Ratio
+  N7, \field Rated Low Speed Sensible Heat Ratio
        \note Rated sensible heat ratio (gross sensible capacity/gross total capacity)
        \note sensible and total capacities do not include supply fan heat
        \type real
@@ -15806,14 +15815,14 @@ OS:Coil:Cooling:DX:TwoSpeed,
        \autosizable
        \minimum 0.5
        \maximum 1
-  N7, \field Rated Low Speed COP
+  N8, \field Rated Low Speed COP
        \note Gross cooling capacity divided by power input to the compressor and outdoor fan,
        \note does not include supply fan heat or supply fan electrical energy input
        \type real
        \units W/W
        \minimum> 0
        \default 3.0
-  N8, \field Rated Low Speed Air Flow Rate
+  N9, \field Rated Low Speed Air Flow Rate
        \note Flow rate corresponding to rated total cooling capacity, Rated SHR
        \note and Rated COP. Should be between 0.00004027 m3/s and .00006041 m3/s per watt
        \note of rated total cooling capacity.
@@ -15845,37 +15854,41 @@ OS:Coil:Cooling:DX:TwoSpeed,
        \default AirCooled
        \key AirCooled
        \key EvaporativelyCooled
-  N9, \field High Speed Evaporative Condenser Effectiveness
+  N10, \field Minimum Outdoor Dry-Bulb Temperature for Compressor Operation
+       \type real
+       \default -25.0
+       \units C
+  N11, \field High Speed Evaporative Condenser Effectiveness
        \type real
        \units dimensionless
        \minimum 0
        \maximum 1
        \default 0.9
-  N10, \field High Speed Evaporative Condenser Air Flow Rate
+  N12, \field High Speed Evaporative Condenser Air Flow Rate
        \note Used to calculate evaporative condenser water use
        \type real
        \autosizable
        \units m3/s
        \minimum> 0
-  N11, \field High Speed Evaporative Condenser Pump Rated Power Consumption
+  N13, \field High Speed Evaporative Condenser Pump Rated Power Consumption
        \note Rated power consumed by the evaporative condenser's water pump at high speed
        \type real
        \autosizable
        \units W
        \minimum 0
-  N12, \field Low Speed Evaporative Condenser Effectiveness
+  N14, \field Low Speed Evaporative Condenser Effectiveness
        \type real
        \units dimensionless
        \minimum 0
        \maximum 1
        \default 0.9
-  N13, \field Low Speed Evaporative Condenser Air Flow Rate
+  N15, \field Low Speed Evaporative Condenser Air Flow Rate
        \note Used to calculate evaporative condenser water use
        \type real
        \autosizable
        \units m3/s
        \minimum> 0
-  N14, \field Low Speed Evaporative Condenser Pump Rated Power Consumption
+  N16, \field Low Speed Evaporative Condenser Pump Rated Power Consumption
        \note Rated power consumed by the evaporative condenser's water pump at low speed
        \type real
        \autosizable
@@ -15887,7 +15900,7 @@ OS:Coil:Cooling:DX:TwoSpeed,
   A16, \field Condensate Collection Water Storage Tank Name
        \type object-list
        \object-list WaterStorageTankNames
-  N15, \field Basin Heater Capacity
+  N17, \field Basin Heater Capacity
        \note This field is only used for Condenser Type = EvaporativelyCooled and for periods
        \note when the basin heater is available (field Basin Heater Operating Schedule Name).
        \note For this situation, the heater maintains the basin water temperature at the basin heater
@@ -15897,7 +15910,7 @@ OS:Coil:Cooling:DX:TwoSpeed,
        \units W/K
        \minimum 0
        \default 0.0
-  N16, \field Basin Heater Setpoint Temperature
+  N18, \field Basin Heater Setpoint Temperature
        \note This field is only used for Condenser Type = EvaporativelyCooled.
        \note Enter the outdoor dry-bulb temperature when the basin heater turns on.
        \type real