From 2ee87ebc7b92207b7f40e1cdb3e6e0f09caf6014 Mon Sep 17 00:00:00 2001
From: Michael Barlow <mbarlow@rmi.org>
Date: Wed, 17 Sep 2025 15:11:37 -0600
Subject: [PATCH] feat(transmission): add transmission_loss_rate xml attribute
 and wire into TransmissionCompressor

---
 opgee/etc/attributes.xml                   | 1 +
 opgee/processes/transmission_compressor.py | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/opgee/etc/attributes.xml b/opgee/etc/attributes.xml
index 2295e937..46c49962 100644
--- a/opgee/etc/attributes.xml
+++ b/opgee/etc/attributes.xml
@@ -673,6 +673,7 @@
       <AttrDef name="transmission_dist" type="float" unit="mile" desc="Gas transmission distance">680.0</AttrDef>
       <AttrDef name="transmission_freq" type="float" unit="mile" desc="Frequency of gas transmission compressors"> 200.0</AttrDef>
       <AttrDef name="transmission_inlet_press" type="float" unit="psia" desc="First compressor stage inlet pressure">1015.26</AttrDef>
+      <AttrDef name="transmission_loss_rate" type="float" unit="percent" desc="Percent transmission gas loss rate">3.0</AttrDef>
       <Options name="prime_mover_type" default="NG_engine">
         <Option>NG_engine</Option>
         <Option>Electric_motor</Option>
diff --git a/opgee/processes/transmission_compressor.py b/opgee/processes/transmission_compressor.py
index a603e5f3..c1ca2f05 100644
--- a/opgee/processes/transmission_compressor.py
+++ b/opgee/processes/transmission_compressor.py
@@ -58,7 +58,7 @@ def cache_attributes(self):
         self.gas_to_storage_frac = self.attr("gas_to_storage_frac")
         self.natural_gas_to_liquefaction_frac = self.field.natural_gas_to_liquefaction_frac
         self.transmission_sys_discharge = self.attr("transmission_sys_discharge")
-        self.loss_rate = self.venting_fugitive_rate()
+        self.loss_rate = self.attr("transmission_loss_rate")
 
     def run(self, analysis):
         self.print_running_msg()