Python delta Examples

Example #1

File: etrad10.py Project: mauriciocap/peko

def etorad(fs,station_name,filename):

	#fs lista donde cada valor es un renglon del archivo
	#station name
	#name of fs file
	
	info_file='METAR_Station_Places.txt'	#libreria de centrales 
	
	krs=0.18		#0.16 interior, 0.19 coast, Rs=0.7Ra-4 island
	
	j=int(filename[4:7])
	temp=data_matrix(fs)
	print temp
	wmed=temp['med_wind']
	tmax=temp['tmax']
	tmin=temp['tmin']
	tmed=temp['tmed']
	etowind=temp['etowind']
	
	lat=station_name['latitude']*3.14159265/180
	hemisf=station_name['hemisf']
	z=station_name['altitude']	
	p=etowind20.atmp(z,tmed)
	

	d=etowind20.delta(tmed)
						
	g=etowind20.gamma(p)

	DT=d/(d+g*(1+0.34*wmed))

	dr(j)
	dmin(j)
	ws(j, lat)
	ext_radiation=ra(j,lat)
	N(j,lat)
	surface_rad=rs(krs,tmax,tmin,ext_radiation) #Mean surface radiation
	pot_rad=rso(z,j,lat)

	esuba=temp['eamed']
	rnl(tmed,esuba,surface_rad,pot_rad)
	radiation=rn(pot_rad,surface_rad)
	#print radiation

	etorad=DT*(0.408*radiation*0.98)	#0.98 Estimador Gonzalo, estima perdidas por G

	
	#print "\nETO WindTODAY: " +str(etowind)+"\nETOradTODAY: " +str(etorad)+"\nETOTODAY: " +str(float(etorad)+float(etowind))+"\nEstimada: " +str(0.0023*(tmed+17.8)*ext_radiation*(tmax-tmin)**(0.5))

	return "\nETO WindTODAY: " +str(etowind)+"\nETOradTODAY: " +str(etorad)+"\nETOTODAY: " +str(float(etorad)+float(etowind))+"\nEstimada: " +str(0.0023*(tmed+17.8)*ext_radiation*(tmax-tmin)**(0.5))

Example #2

File: etrad10.py Project: supergonzalo/peko

def etorad(fs,station_name,filename):

	#fs lista donde cada valor es un renglon del archivo
	#station name
	#name of fs file
	
	krs=0.18		#0.16 interior, 0.19 coast, Rs=0.7Ra-4 island
	
	j=int(filename[4:7])
	temp=data_matrix(fs)
	#print 'temp %s'%temp
	wmed=temp['med_wind']
	tmax=temp['tmax']
	tmin=temp['tmin']
	tmed=temp['tmed']
	etowind=temp['etowind']
	
	lat=float(station_name['latrad'])
	hemisf=station_name['hemisf']
	z=float(station_name['altitude'])
	factor=float(station_name['factor'])	
	p=etowind20.atmp(z,tmed)
	

	d=etowind20.delta(tmed)
						
	g=etowind20.gamma(p)

	DT=d/(d+g*(1+0.34*wmed))

	dr(j)
	dmin(j)
	ws(j, lat)
	ext_radiation=ra(j,lat)
	N(j,lat)
	surface_rad=rs(krs,tmax,tmin,ext_radiation) #Mean surface radiation
	pot_rad=rso(z,j,lat)

	esuba=temp['eamed']
	#rnl(tmed,esuba,surface_rad,pot_rad)
	radiation=rn(pot_rad,surface_rad)
	#print radiation

	etorad=DT*(0.408*radiation)	
	if etorad<0:
		etorad=0
	
	#print "\nETO WindTODAY: " +str(etowind)+"\nETOradTODAY: " +str(etorad)+"\nETOTODAY: " +str(float(etorad)+float(etowind))+"\nEstimada: " +str(0.0023*(tmed+17.8)*ext_radiation*(tmax-tmin)**(0.5))

	return "\nETO WindTODAY: " +str(etowind)+"\nETOradTODAY: " +str(etorad)+"\nETOTODAY: " +str(factor*(float(etorad)+float(etowind)))+"\nEstimada: " +str(0.0023*(tmed+17.8)*ext_radiation*(abs(tmax-tmin))**(0.5))+ "\nTempMax: "+str(tmax)+"\nTempMin: "+str(tmin) + "\nTempMed: "+str(tmed) + "\nWindMed: "+str(wmed)

Example #3

File: etrad10.py Project: mauriciocap/peko

def eto(tmed,rn,p,es,ea,ws):
	#0.95 Estimador Gonzalo, estima G
	return (0.408*rn*0.97*etowind20.delta(tmed)+etowind20.gamma(p)*(900/(tmed+273))*ws*(es-ea))/(etowind20.delta(tmed)+etowind20.gamma(p)*(1+0.34*ws))

Example #4

File: etrad10.py Project: supergonzalo/peko

def eto(tmed,rn,p,es,ea,ws):
	
	return (0.408*rn*etowind20.delta(tmed)+etowind20.gamma(p)*(900/(tmed+273))*ws*(es-ea))/(etowind20.delta(tmed)+etowind20.gamma(p)*(1+0.34*ws))