Merge pull request #55 from tarao1006/hotfix/heat-exchanger-area

Hotfix/heat exchanger area

VERSION

@@ -1 +1 @@
-0.3.0
+0.3.1

docs/conf.py

@@ -22,7 +22,7 @@
 author = 'tarao1006'
 
 # The full version, including alpha/beta/rc tags
-release = '0.3.0'
+release = '0.3.1'
 
 
 # -- General configuration ---------------------------------------------------

src/pyheatintegration/heat_exchanger.py

@@ -84,7 +84,6 @@ class HeatExchanger:
         hot_temperature_range (TemperatureRange): 与熱流体の温度領域。
         cold_temperature_range (TemperatureRange): 受熱流体の温度領域。
         lmtd (float): 対数平均温度差。
-        area (float): 向流の場合の必要面積 [m2]。
         hot_plot_segment (PlotSegment): 与熱流体のプロットセグメント。
         cold_plot_segment (PlotSegment): 受熱流体のプロットセグメント。
         reboiler_or_reactor (bool): リボイラーもしくは反応器で用いるか。
@@ -108,18 +107,11 @@ def __init__(
         self.cold_stream_state = self.cold_plot_segment.state
         self.reboiler_or_reactor = self.hot_plot_segment.reboiler_or_reactor | self.cold_plot_segment.reboiler_or_reactor
 
-        self.overall_heat_transfer_coefficient = get_overall_heat_transfer_coefficient(
-            self.hot_stream_state,
-            self.cold_stream_state
-        )
-
         if counterflow:
             self.lmtd = self.init_lmtd_counterflow()
         else:
             self.lmtd = self.init_lmtd_pararell_flow()
 
-        self.area = self.heat_range.delta / self.lmtd / self.overall_heat_transfer_coefficient
-
     def __repr__(self) -> str:
         return (
             'HeatExchanger('
@@ -181,6 +173,18 @@ def init_lmtd_counterflow(self) -> float:
 
         return (start_temp_diff - finish_temp_diff) / math.log(start_temp_diff / finish_temp_diff)
 
+    def get_area(self, ignore_unknown: bool = True) -> float:
+        try:
+            overall_heat_transfer_coefficient = get_overall_heat_transfer_coefficient(
+                self.hot_stream_state,
+                self.cold_stream_state
+            )
+            return self.heat_range.delta / self.lmtd / overall_heat_transfer_coefficient
+        except Exception as e:
+            if ignore_unknown:
+                return 1.0
+            raise e
+
 
 def merge_heat_exchangers(heat_exchanger: HeatExchanger, other: HeatExchanger) -> HeatExchanger:
     """熱交換器を結合します。

src/pyheatintegration/pinch_analyzer.py

@@ -49,7 +49,6 @@ class PinchAnalyzer:
         minimum_approach_temp_diff_range (TemperatureRange): 最小接近温度差の指定可能範囲。
         pinch_point_temp (float): ピンチポイントの温度 [℃]。
         heat_exchangers (list[HeatExchanger]): 熱交換器のリスト。
-        heat_exchanger_cost (float): 熱交換器のコスト。
         external_heating_demand (float): 必要加熱量[W]。
         external_cooling_demand (float): 必要冷却熱量[W]。
 
@@ -134,14 +133,6 @@ def __init__(
                 HeatExchanger(heat_range, hot_plot_segment, cold_plot_segment)
             )
 
-        self.heat_exchanger_cost = sum(
-            calculate_heat_exchanger_cost(
-                heat_exchanger.area,
-                heat_exchanger.reboiler_or_reactor
-            )
-            for heat_exchanger in self.heat_exchangers
-        )
-
     def create_grand_composite_curve(self) -> tuple[list[float], list[float]]:
         """グランドコンポジットカーブを描くために必要な熱量と温度を返します。
         """
@@ -178,3 +169,11 @@ def create_tq_merged(self) -> tuple[list[Line], list[Line]]:
             self.tq.hot_lines_merged,
             self.tq.cold_lines_merged
         )
+
+    def get_heat_exchanger_cost(self, ignore_unknown: bool = True) -> float:
+        return sum(
+            calculate_heat_exchanger_cost(
+                heat_exchanger.get_area(ignore_unknown),
+                heat_exchanger.reboiler_or_reactor
+            ) for heat_exchanger in self.heat_exchangers
+        )