From 3a10a06e3a269d6d990fe038181b994c06d0c9ff Mon Sep 17 00:00:00 2001
From: Alex Clerc <alex.clerc@res-group.com>
Date: Mon, 22 Apr 2024 11:44:34 +0100
Subject: [PATCH] Create wind_funcs.py

---
 wind_up/wind_funcs.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 wind_up/wind_funcs.py

diff --git a/wind_up/wind_funcs.py b/wind_up/wind_funcs.py
new file mode 100644
index 0000000..b6603b7
--- /dev/null
+++ b/wind_up/wind_funcs.py
@@ -0,0 +1,13 @@
+import math
+
+import pandas as pd
+
+
+def calc_cp(
+    power_kw: float | pd.Series,
+    ws_ms: float | pd.Series,
+    air_density_kgpm3: float | pd.Series,
+    rotor_diameter_m: float,
+) -> float | pd.Series:
+    rotor_area_m2 = math.pi * (rotor_diameter_m / 2) ** 2
+    return 1000.0 * power_kw / (0.5 * air_density_kgpm3 * rotor_area_m2 * ws_ms**3)