Heating and Ventilation Control
HvcControl
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from datetime import datetime from HvcTables import * """ Dr. Arne Jachens 2020-06-19 """ class HvcControl: def __init__(self): self.operationMode = {} self.parameters = {} pass def solar(self,sensors,actuators,hour,minutes): """ Solar control, enable pump, when solar collector is warmer then tank bottom. In vacation mode, engage pump at night to cool tank. """ HvcTables = HvcControl.HvcTables operationMode = self.operationMode if operationMode['solar']=="off": actuators['solar']=0 elif operationMode['solar']=="on": actuators['solar']=1 else: #auto DeltaT = sensors['coll'] - sensors['TLow'] actuators['solar'] = HvcTables.interpol( DeltaT, "solarLevel", "saturate" ) solarMode = "operate" if operationMode['opMod']=="vacation": # cool down at night, if storage is too hot now = datetime.now() hour = int(now.strftime("%H")) night=True; if int(hour)>6: night=False if int(hour)>20: night=True if night and sensors['THot']>60 and sensors['TAmb']<sensors['TLow']: solarMode = "coolDown" elif night and sensors['THot']<55: solarMode = "operate" elif not night: solarMode = "operate" if operationMode['opMod']=="winter": #let circulation cool down, when effciency gets bad in the afternoon if int(hour)>=self.parameters["hourSolarOff"]: actuators['solar'] = 0 elif solarMode == "coolDown": actuators['solar']=0.3 # minute = int(now.strftime("%M")) # if (minute % 2) == 0: # actuators['solar']=1 # else: # actuators['solar']=0 else: #standart operation of solar heating if sensors['coll']<sensors['TLow']+10: actuators['solar']=0 return actuators['solar'] def oven(self,sensors,actuators,hour,minutes): """ Oven control, engage oven, when tank top gets too cold, stop oven, when tank reaches upper target Temperature. In summer mode, tolerate lower tank Temperature in the morning, if sun is expected to shine today :-) """ operationMode = self.operationMode if operationMode['oven']=="off": actuators['oven']=0 elif operationMode['oven']=="on": actuators['oven']=1 else: #auto if sensors['THot']<self.parameters["TOfenAn"] and operationMode['opMod']=="winter": actuators['oven']=1 elif sensors['THot']<self.parameters["TOfenAn"] and operationMode['opMod']=="summer" and hour>=14: actuators['oven']=1 if sensors['THot']>self.parameters["TOfenAus"]: actuators['oven']=0 return actuators['oven'] def pump(self,sensors,actuators): """ Pump control, engage circulation to heat air, when house gets too cold, stop pump, when house Temperature is above target. In summer mode, keep pump = off In winter mode, pump operates as long as the oven is on, to make use of the heat when it is produced. """ operationMode = self.operationMode if operationMode['pump']=="on": actuators['pump']=1 elif operationMode['pump']=="off": actuators['pump']=0 elif operationMode['opMod']=="winter": #haus2 ist Marens Zimmer, haus3 Arnes, haus1 das Wohnzimmer if sensors['haus2']>self.parameters["THausSoll"]+0.5: actuators['pump']=0 elif sensors['haus2']<self.parameters["THausSoll"]: actuators['pump']=1 #print('pump',actuators['oven'],sensors['fire']) if actuators['oven']>0.5 and sensors['THot']>40: actuators['pump']=1 else: actuators['pump']=0 return actuators['pump'] def vent(self,sensors,actuators,hour,minutes): """ Ventilation is generally set to normal. A few times per day, it is set to maximum to vent the house. In winter mode, maximum is choosen, when oven = on, to bring the heat into the house. """ operationMode = self.operationMode if operationMode['vent']=="off": actuators['vent']=0 #0xff elif operationMode['vent']=="minimal": actuators['vent']=self.parameters["ventMinimal"] #0xbb elif operationMode['vent']=="normal": actuators['vent']=self.parameters["ventNormal"] #0x99 elif operationMode['vent']=="maximal": actuators['vent']=1.00 #0x00 elif operationMode['vent']=="auto": #print('vent',actuators['oven'],sensors['fire']) #if actuators['oven']>0.5 and sensors['fire']>30: if actuators['oven']>0.5 and sensors['THot']>40: actuators['vent']=1.00 #elif operationMode['opMod']=="summer": #time controlled elif actuators['pump']>0.5: actuators['vent']=self.parameters["ventNormal"] else: actuators['vent']=self.parameters["ventMinimal"] return actuators['vent'] def byPs(self,sensors,actuators): """ ByPass is open in summer to have maximal cooling, in winter mode it is shut to recover the heat from ventilation. """ operationMode = self.operationMode if operationMode['byPs']=="shut": actuators['byPs']=0 # t.b.d elif operationMode['byPs']=="open": actuators['byPs']=0 # t.b.d return actuators['byPs'] def execute(self,operationMode,sensors,actuators,parameters,hour,minutes): """ Container to execute all sub-controls, each sets its actuator new. Comment line out to disable any control """ self.operationMode = operationMode self.parameters = parameters actuators['solar'] = HvcControl.solar(self,sensors,actuators,hour,minutes) actuators['oven'] = HvcControl.oven(self,sensors,actuators,hour,minutes) actuators['pump'] = HvcControl.pump(self,sensors,actuators) actuators['vent'] = HvcControl.vent(self,sensors,actuators,hour,minutes) #actuators['byPs'] = HvcControl.byPs(self,sensors,actuators) return actuators #persistant variables HvcControl.downCounter=0 HvcControl.HvcTables = HvcTables() if __name__ == "__main__": operationMode = {} # { on / off / auto / (1,2,3) / (open/shut) } operationMode['solar']= "off" operationMode['oven'] = "off" operationMode['pump'] = "off" operationMode['vent'] = "off" operationMode['byPs'] = "shut" operationMode['opMod'] = 'winter' sensors = {'coll': 44.22, 'TLow': 26.58, 'THot': 42.60, 'flow': 21.6, 'ret': 21.15, 'fire': 23.0, 'haus': 23.35, 'erde': 17.8, 'zulu': 40.27, 'ablu': 19.05, 'posBp': 252.0} actuators = {'solar': 0, 'oven': 0, 'pump': 0, 'vent':'off'} hour = 00 minutes = 00 parameters = {'THausSoll': 22.8, 'TOfenAn': 35.0, 'TOfenAus': 60.0, 'DeltaTKollektor': 15.0, 'hourSolarOff': 15.0, 'ventMinimal': 0.27, 'ventNormal': 0.6, 'debug': 0.0} hvc = HvcControl() print("Test: solar = off, manual") sensors['THot']=42 sensors['coll']=100 hvc.execute(operationMode,sensors,actuators,parameters,hour,minutes) print(actuators) print("=============================") print("Test: solar = on, manual") sensors['THot']=42 sensors['coll']=42 operationMode['solar']= "on" hvc.execute(operationMode,sensors,actuators,parameters,hour,minutes) print(actuators) print("=============================") print("Test: solar = on, auto") sensors['THot']=42 sensors['coll']=100 operationMode['solar']= "auto" hvc.execute(operationMode,sensors,actuators,parameters,hour,minutes) print(actuators) print("=============================") print("Test: solar = off, auto") sensors['THot']=42 sensors['coll']=00 operationMode['solar']= "auto" hvc.execute(operationMode,sensors,actuators,parameters,hour,minutes) print(actuators) print("=============================") print("Test: vent if oven on") sensors['THot']=10 sensors['fire']=60 actuators['oven']=1.0 operationMode['opMod']= "winter" operationMode['oven']= "auto" operationMode['pump']= "auto" operationMode['vent']= "auto" hvc.execute(operationMode,sensors,actuators,parameters,hour,minutes) print(actuators)
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