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Change radiation units to kWh

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Matthew Oslan
2019-06-18 10:46:51 -04:00
parent 009fa90ec8
commit f68a981257
2 changed files with 37 additions and 37 deletions
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12
routes/adjustmentMethods/EToAdjustmentMethod.ts
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@@ -74,6 +74,8 @@ export function calculateETo( etoData: EToData, elevation: number, coordinates:
elevation = elevation / 3.281; elevation = elevation / 3.281;
// Convert to meters per second. // Convert to meters per second.
const windSpeed = etoData.windSpeed / 2.237; const windSpeed = etoData.windSpeed / 2.237;
// Convert to megajoules.
const solarRadiation = etoData.solarRadiation * 3.6;
const avgTemp = ( maxTemp + minTemp ) / 2; const avgTemp = ( maxTemp + minTemp ) / 2;
@@ -111,8 +113,6 @@ export function calculateETo( etoData: EToData, elevation: number, coordinates:
const clearSkyRadiation = ( 0.75 + 2e-5 * elevation ) * extraterrestrialRadiation; const clearSkyRadiation = ( 0.75 + 2e-5 * elevation ) * extraterrestrialRadiation;
const solarRadiation = etoData.solarRadiation;
const netShortWaveRadiation = ( 1 - 0.23 ) * solarRadiation; const netShortWaveRadiation = ( 1 - 0.23 ) * solarRadiation;
const netOutgoingLongWaveRadiation = 4.903e-9 * ( Math.pow( maxTemp + 273.16, 4 ) + Math.pow( minTemp + 273.16, 4 ) ) / 2 * ( 0.34 - 0.14 * Math.sqrt( actualVaporPressure ) ) * ( 1.35 * solarRadiation / clearSkyRadiation - 0.35); const netOutgoingLongWaveRadiation = 4.903e-9 * ( Math.pow( maxTemp + 273.16, 4 ) + Math.pow( minTemp + 273.16, 4 ) ) / 2 * ( 0.34 - 0.14 * Math.sqrt( actualVaporPressure ) ) * ( 1.35 * solarRadiation / clearSkyRadiation - 0.35);
@@ -149,7 +149,7 @@ SunCalc.addTime( Math.asin( 30 / 990 ) * 180 / Math.PI, "radiationStart", "radia
* http://www.shodor.org/os411/courses/_master/tools/calculators/solarrad/ * http://www.shodor.org/os411/courses/_master/tools/calculators/solarrad/
* @param cloudCoverInfo Information about the cloud coverage for several periods that span the entire day. * @param cloudCoverInfo Information about the cloud coverage for several periods that span the entire day.
* @param coordinates The coordinates of the location the data is from. * @param coordinates The coordinates of the location the data is from.
* @return The total solar radiation for the day (in megajoules per square meter per day). * @return The total solar radiation for the day (in kilowatt hours per square meter per day).
*/ */
export function approximateSolarRadiation(cloudCoverInfo: CloudCoverInfo[], coordinates: GeoCoordinates ): number { export function approximateSolarRadiation(cloudCoverInfo: CloudCoverInfo[], coordinates: GeoCoordinates ): number {
return cloudCoverInfo.reduce( ( total, window: CloudCoverInfo ) => { return cloudCoverInfo.reduce( ( total, window: CloudCoverInfo ) => {
@@ -172,8 +172,8 @@ export function approximateSolarRadiation(cloudCoverInfo: CloudCoverInfo[], coor
const endPosition = SunCalc.getPosition( endTime.toDate(), coordinates[ 0 ], coordinates[ 1 ] ); const endPosition = SunCalc.getPosition( endTime.toDate(), coordinates[ 0 ], coordinates[ 1 ] );
const solarElevationAngle = ( startPosition.altitude + endPosition.altitude ) / 2; const solarElevationAngle = ( startPosition.altitude + endPosition.altitude ) / 2;
// Calculate radiation and convert from watts to megajoules. // Calculate radiation and convert from watts to kilowatts.
const clearSkyIsolation = ( 990 * Math.sin( solarElevationAngle ) - 30 ) * 0.0036 * windowLength; const clearSkyIsolation = ( 990 * Math.sin( solarElevationAngle ) - 30 ) / 1000 * windowLength;
return total + clearSkyIsolation * ( 1 - 0.75 * Math.pow( window.cloudCover, 3.4 ) ); return total + clearSkyIsolation * ( 1 - 0.75 * Math.pow( window.cloudCover, 3.4 ) );
}, 0 ); }, 0 );
@@ -212,7 +212,7 @@ export interface EToData {
minHumidity: number; minHumidity: number;
/** The maximum relative humidity over the time period (as a percentage). */ /** The maximum relative humidity over the time period (as a percentage). */
maxHumidity: number; maxHumidity: number;
/** The solar radiation, accounting for cloud coverage (in megajoules per square meter per day). */ /** The solar radiation, accounting for cloud coverage (in kilowatt hours per square meter per day). */
solarRadiation: number; solarRadiation: number;
/** /**
* The average wind speed measured at 2 meters over the time period (in miles per hour). A measurement taken at a * The average wind speed measured at 2 meters over the time period (in miles per hour). A measurement taken at a

62
test/etoTest.json
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@@ -6,37 +6,37 @@
"coordinates": [ -33.90, 150.73 ], "coordinates": [ -33.90, 150.73 ],
"startTimestamp": 1556668800, "startTimestamp": 1556668800,
"entries": [ "entries": [
{"eto":0.075,"data":{"maxTemp":76.46,"minTemp":55.04,"maxHumidity":100,"minHumidity":58,"windSpeed":2.309,"solarRadiation":10.4}}, {"eto":0.075,"data":{"maxTemp":76.46,"minTemp":55.04,"maxHumidity":100,"minHumidity":58,"windSpeed":2.309,"solarRadiation":2.889}},
{"eto":0.063,"data":{"maxTemp":77,"minTemp":56.84,"maxHumidity":100,"minHumidity":63,"windSpeed":1.707,"solarRadiation":8.66}}, {"eto":0.063,"data":{"maxTemp":77,"minTemp":56.84,"maxHumidity":100,"minHumidity":63,"windSpeed":1.707,"solarRadiation":2.406}},
{"eto":0.035,"data":{"maxTemp":68.36,"minTemp":56.84,"maxHumidity":100,"minHumidity":91,"windSpeed":2.309,"solarRadiation":4.27}}, {"eto":0.035,"data":{"maxTemp":68.36,"minTemp":56.84,"maxHumidity":100,"minHumidity":91,"windSpeed":2.309,"solarRadiation":1.186}},
{"eto":0.11,"data":{"maxTemp":72.86,"minTemp":58.46,"maxHumidity":100,"minHumidity":36,"windSpeed":5.254,"solarRadiation":12.15}}, {"eto":0.11,"data":{"maxTemp":72.86,"minTemp":58.46,"maxHumidity":100,"minHumidity":36,"windSpeed":5.254,"solarRadiation":3.375}},
{"eto":0.098,"data":{"maxTemp":69.44,"minTemp":48.56,"maxHumidity":96,"minHumidity":46,"windSpeed":6.324,"solarRadiation":10.61}}, {"eto":0.098,"data":{"maxTemp":69.44,"minTemp":48.56,"maxHumidity":96,"minHumidity":46,"windSpeed":6.324,"solarRadiation":2.947}},
{"eto":0.098,"data":{"maxTemp":70.16,"minTemp":47.84,"maxHumidity":97,"minHumidity":39,"windSpeed":4.551,"solarRadiation":13.68}}, {"eto":0.098,"data":{"maxTemp":70.16,"minTemp":47.84,"maxHumidity":97,"minHumidity":39,"windSpeed":4.551,"solarRadiation":3.8}},
{"eto":0.075,"data":{"maxTemp":71.42,"minTemp":39.74,"maxHumidity":100,"minHumidity":37,"windSpeed":2.259,"solarRadiation":13.56}}, {"eto":0.075,"data":{"maxTemp":71.42,"minTemp":39.74,"maxHumidity":100,"minHumidity":37,"windSpeed":2.259,"solarRadiation":3.767}},
{"eto":0.114,"data":{"maxTemp":68.36,"minTemp":41.36,"maxHumidity":99,"minHumidity":34,"windSpeed":6.676,"solarRadiation":12.96}}, {"eto":0.114,"data":{"maxTemp":68.36,"minTemp":41.36,"maxHumidity":99,"minHumidity":34,"windSpeed":6.676,"solarRadiation":3.6}},
{"eto":0.063,"data":{"maxTemp":68.72,"minTemp":36.32,"maxHumidity":99,"minHumidity":36,"windSpeed":1.673,"solarRadiation":13.14}}, {"eto":0.063,"data":{"maxTemp":68.72,"minTemp":36.32,"maxHumidity":99,"minHumidity":36,"windSpeed":1.673,"solarRadiation":3.65}},
{"eto":0.071,"data":{"maxTemp":65.66,"minTemp":41.18,"maxHumidity":100,"minHumidity":43,"windSpeed":3.999,"solarRadiation":6.76}}, {"eto":0.071,"data":{"maxTemp":65.66,"minTemp":41.18,"maxHumidity":100,"minHumidity":43,"windSpeed":3.999,"solarRadiation":1.878}},
{"eto":0.13,"data":{"maxTemp":69.08,"minTemp":42.08,"maxHumidity":78,"minHumidity":38,"windSpeed":7.88,"solarRadiation":12.99}}, {"eto":0.13,"data":{"maxTemp":69.08,"minTemp":42.08,"maxHumidity":78,"minHumidity":38,"windSpeed":7.88,"solarRadiation":3.608}},
{"eto":0.071,"data":{"maxTemp":71.6,"minTemp":38.48,"maxHumidity":99,"minHumidity":35,"windSpeed":2.158,"solarRadiation":12.98}}, {"eto":0.071,"data":{"maxTemp":71.6,"minTemp":38.48,"maxHumidity":99,"minHumidity":35,"windSpeed":2.158,"solarRadiation":3.606}},
{"eto":0.067,"data":{"maxTemp":73.04,"minTemp":38.84,"maxHumidity":100,"minHumidity":51,"windSpeed":2.326,"solarRadiation":12.49}}, {"eto":0.067,"data":{"maxTemp":73.04,"minTemp":38.84,"maxHumidity":100,"minHumidity":51,"windSpeed":2.326,"solarRadiation":3.469}},
{"eto":0.079,"data":{"maxTemp":75.74,"minTemp":43.52,"maxHumidity":100,"minHumidity":33,"windSpeed":2.242,"solarRadiation":12.75}}, {"eto":0.079,"data":{"maxTemp":75.74,"minTemp":43.52,"maxHumidity":100,"minHumidity":33,"windSpeed":2.242,"solarRadiation":3.542}},
{"eto":0.067,"data":{"maxTemp":72.68,"minTemp":44.42,"maxHumidity":100,"minHumidity":45,"windSpeed":1.991,"solarRadiation":12.62}}, {"eto":0.067,"data":{"maxTemp":72.68,"minTemp":44.42,"maxHumidity":100,"minHumidity":45,"windSpeed":1.991,"solarRadiation":3.506}},
{"eto":0.067,"data":{"maxTemp":71.6,"minTemp":44.06,"maxHumidity":100,"minHumidity":47,"windSpeed":2.326,"solarRadiation":12.47}}, {"eto":0.067,"data":{"maxTemp":71.6,"minTemp":44.06,"maxHumidity":100,"minHumidity":47,"windSpeed":2.326,"solarRadiation":3.464}},
{"eto":0.071,"data":{"maxTemp":73.94,"minTemp":43.16,"maxHumidity":100,"minHumidity":45,"windSpeed":2.393,"solarRadiation":12.28}}, {"eto":0.071,"data":{"maxTemp":73.94,"minTemp":43.16,"maxHumidity":100,"minHumidity":45,"windSpeed":2.393,"solarRadiation":3.411}},
{"eto":0.071,"data":{"maxTemp":73.4,"minTemp":45.5,"maxHumidity":100,"minHumidity":50,"windSpeed":2.56,"solarRadiation":12.3}}, {"eto":0.071,"data":{"maxTemp":73.4,"minTemp":45.5,"maxHumidity":100,"minHumidity":50,"windSpeed":2.56,"solarRadiation":3.417}},
{"eto":0.063,"data":{"maxTemp":73.22,"minTemp":51.44,"maxHumidity":100,"minHumidity":51,"windSpeed":2.342,"solarRadiation":10.02}}, {"eto":0.063,"data":{"maxTemp":73.22,"minTemp":51.44,"maxHumidity":100,"minHumidity":51,"windSpeed":2.342,"solarRadiation":2.783}},
{"eto":0.055,"data":{"maxTemp":74.12,"minTemp":46.58,"maxHumidity":100,"minHumidity":51,"windSpeed":1.69,"solarRadiation":9.74}}, {"eto":0.055,"data":{"maxTemp":74.12,"minTemp":46.58,"maxHumidity":100,"minHumidity":51,"windSpeed":1.69,"solarRadiation":2.706}},
{"eto":0.067,"data":{"maxTemp":78.44,"minTemp":44.06,"maxHumidity":100,"minHumidity":43,"windSpeed":1.723,"solarRadiation":11.84}}, {"eto":0.067,"data":{"maxTemp":78.44,"minTemp":44.06,"maxHumidity":100,"minHumidity":43,"windSpeed":1.723,"solarRadiation":3.289}},
{"eto":0.071,"data":{"maxTemp":77.36,"minTemp":47.3,"maxHumidity":100,"minHumidity":40,"windSpeed":2.125,"solarRadiation":11.76}}, {"eto":0.071,"data":{"maxTemp":77.36,"minTemp":47.3,"maxHumidity":100,"minHumidity":40,"windSpeed":2.125,"solarRadiation":3.267}},
{"eto":0.063,"data":{"maxTemp":74.48,"minTemp":53.06,"maxHumidity":100,"minHumidity":53,"windSpeed":1.991,"solarRadiation":11.43}}, {"eto":0.063,"data":{"maxTemp":74.48,"minTemp":53.06,"maxHumidity":100,"minHumidity":53,"windSpeed":1.991,"solarRadiation":3.175}},
{"eto":0.059,"data":{"maxTemp":73.58,"minTemp":44.42,"maxHumidity":100,"minHumidity":48,"windSpeed":2.008,"solarRadiation":11.19}}, {"eto":0.059,"data":{"maxTemp":73.58,"minTemp":44.42,"maxHumidity":100,"minHumidity":48,"windSpeed":2.008,"solarRadiation":3.108}},
{"eto":0.087,"data":{"maxTemp":77.9,"minTemp":42.8,"maxHumidity":100,"minHumidity":26,"windSpeed":2.828,"solarRadiation":11.78}}, {"eto":0.087,"data":{"maxTemp":77.9,"minTemp":42.8,"maxHumidity":100,"minHumidity":26,"windSpeed":2.828,"solarRadiation":3.272}},
{"eto":0.091,"data":{"maxTemp":72.68,"minTemp":44.24,"maxHumidity":92,"minHumidity":29,"windSpeed":3.865,"solarRadiation":9.89}}, {"eto":0.091,"data":{"maxTemp":72.68,"minTemp":44.24,"maxHumidity":92,"minHumidity":29,"windSpeed":3.865,"solarRadiation":2.747}},
{"eto":0.13,"data":{"maxTemp":66.02,"minTemp":39.74,"maxHumidity":82,"minHumidity":35,"windSpeed":9.905,"solarRadiation":8.73}}, {"eto":0.13,"data":{"maxTemp":66.02,"minTemp":39.74,"maxHumidity":82,"minHumidity":35,"windSpeed":9.905,"solarRadiation":2.425}},
{"eto":0.106,"data":{"maxTemp":65.66,"minTemp":37.58,"maxHumidity":69,"minHumidity":31,"windSpeed":5.739,"solarRadiation":11.56}}, {"eto":0.106,"data":{"maxTemp":65.66,"minTemp":37.58,"maxHumidity":69,"minHumidity":31,"windSpeed":5.739,"solarRadiation":3.211}},
{"eto":0.161,"data":{"maxTemp":65.48,"minTemp":47.66,"maxHumidity":52,"minHumidity":31,"windSpeed":10.859,"solarRadiation":10.79}}, {"eto":0.161,"data":{"maxTemp":65.48,"minTemp":47.66,"maxHumidity":52,"minHumidity":31,"windSpeed":10.859,"solarRadiation":2.997}},
{"eto":0.102,"data":{"maxTemp":60.08,"minTemp":36.68,"maxHumidity":70,"minHumidity":31,"windSpeed":6.743,"solarRadiation":11.42}}, {"eto":0.102,"data":{"maxTemp":60.08,"minTemp":36.68,"maxHumidity":70,"minHumidity":31,"windSpeed":6.743,"solarRadiation":3.172}},
{"eto":0.087,"data":{"maxTemp":68,"minTemp":34.34,"maxHumidity":82,"minHumidity":34,"windSpeed":4.149,"solarRadiation":11.34}} {"eto":0.087,"data":{"maxTemp":68,"minTemp":34.34,"maxHumidity":82,"minHumidity":34,"windSpeed":4.149,"solarRadiation":3.15}}
] ]
} }
] ]