Update project structure and configurations

crates/components/src/heat_exchanger/bphx_exchanger.rs

@@ -94,7 +94,7 @@ impl BphxExchanger {
     ///
     /// let geo = BphxGeometry::from_dh_area(0.003, 0.5, 20);
     /// let hx = BphxExchanger::new(geo);
-    /// assert_eq!(hx.n_equations(), 3);
+    /// assert_eq!(hx.n_equations(), 2);
     /// ```
     pub fn new(geometry: BphxGeometry) -> Self {
         let ua_estimate = Self::estimate_ua(&geometry);
@@ -363,6 +363,12 @@ impl Component for BphxExchanger {
         self.inner.energy_transfers(state)
     }
 
+    fn set_fluid_backend_from_builder(&mut self, backend: std::sync::Arc<dyn entropyk_fluids::FluidBackend>) {
+        if self.fluid_backend.is_none() {
+            self.fluid_backend = Some(backend);
+        }
+    }
+
     fn signature(&self) -> String {
         format!(
             "BphxExchanger({} plates, dh={:.2}mm, A={:.3}m², {})",
@@ -372,6 +378,10 @@ impl Component for BphxExchanger {
             self.correlation_selector.correlation.name()
         )
     }
+
+    fn update_calib_factor(&mut self, factor: &str, value: f64) -> bool {
+        self.inner.update_calib_factor(factor, value)
+    }
 }
 
 impl StateManageable for BphxExchanger {