Lună: februarie 2017

Prima turbina eoliana verticala construita de Windspire in anul 2007 a fost o turbina cu profil Savonius Benesh . Turbina eoliana se remarca prin raportul mare intre inaltime si diametru h/d=10 (h=6m, d=0.6m). Acest lucru permite turbinei sa atinga o turatie de 500 rot/min in ciuda unui TSR mic de ~1.3. Producatorul declara o putere de 1 kW la o viteza a vantului de 11 m/s . Fundatia turbinei este cilindrica cu diametrul de 0.6m si lungimea de ~1.8m in functie de natura solului si potentialul eolian. In conditii reale de lucru probabil turbina nu depaseste puterea de 600w la 11m/s.

O descriere amanuntita a turbinei eoliene VAWT o gasiti in brevetul de inventie US20090097981

O frumoasa turbina Savonius cu trei pale care respecta h/d>>1 realizata de „crazyguy” .

https://www.youtube.com/watch?v=fM5iiOYQP8E

Monitorizarea online wireless a puterii produse de o turbina VAWT se poate realiza cu doar 5$ !

Sunt necesare doar o placa de dezvoltare cu WEMOS D1 MINI ~2.6 $ si un senzor de curent INA 219 ~1.7$.

Daca se inlocuieste rezistenta 0.1 ohm de pe senzorul INA219 cu o rezistenta de 0.01 ohm, 10W se pot masura curenti de pana la 32A cu o rezolutie de 8mA.

Codul necesar :

#include <DHT.h>
#include <Wire.h>
#include <Adafruit_INA219.h>
#include <ESP8266WiFi.h>
#include "ThingSpeak.h"

int AC = 0;
int lastAC = 0;
int turatie = 0;




unsigned long myChannelNumber = 22793;
const char * myWriteAPIKey = "cheie";



const char* ssid = "HUAWEI-SQ77";
const char* password = "parola";

#define DHTPIN D4
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

WiFiClient client;
Adafruit_INA219 ina219;




void setup() {
  Serial.begin(115200);
  delay(10);
  dht.begin();
  WiFi.begin(ssid, password);

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(5000);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  ina219.begin();
  Serial.println("Measuring voltage and current with INA219 ...");
  ThingSpeak.begin(client);
  Serial.println("ThingSpeak connected");
}



void loop() {

 float t = dht.readTemperature();
 float h = dht.readHumidity();
 delay(5);
if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }


  float shuntvoltage = 0;
  float busvoltage = 0;
  float current_mA = 0;
  float loadvoltage = 0;
  float power = 0;
  float turatiei = 0;
  float current_A = 0;


for(int i=0;i<2500;i++)
  {

  shuntvoltage = shuntvoltage + ina219.getShuntVoltage_mV();
  busvoltage =  busvoltage + ina219.getBusVoltage_V();
  current_mA = current_mA + ina219.getCurrent_mA();


   AC = digitalRead(5);
    // Se contorizeaza trecerea prin "0"
   if ((AC == LOW) && (AC != lastAC ))
   {
      turatiei++;
    }
    lastAC= digitalRead(5);
    delay(5);
  }


turatie=turatiei*60/8/15;
shuntvoltage = shuntvoltage/2500;
busvoltage = busvoltage/2500;
loadvoltage = busvoltage + (shuntvoltage / 1000);
current_A = current_mA/2500/1000;
power = loadvoltage * current_A;


  Serial.print("Bus Voltage:   "); Serial.print(busvoltage);
Serial.println(" V");
  Serial.print("Shunt Voltage: "); Serial.print(shuntvoltage);
Serial.println(" mV");
  Serial.print("Load Voltage:  "); Serial.print(loadvoltage);
Serial.println(" V");
  Serial.print("Current:       "); Serial.print(current_A);
Serial.println(" A");
  Serial.print("Power: "); Serial.print(power); Serial.println(" W");
  Serial.println("");


  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.print(" degrees Celsius Humidity: ");
  Serial.print(h);
  Serial.println("");

ThingSpeak.setField(1,loadvoltage);
ThingSpeak.setField(2,current_A);
ThingSpeak.setField(3,power);
ThingSpeak.setField(4,turatie);
ThingSpeak.setField(5,t);
ThingSpeak.setField(6,h);
ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
Serial.println("Send to ThingSpeak");


}

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#include <DHT.h>

#include <Wire.h>

#include <Adafruit_INA219.h>

#include <ESP8266WiFi.h>

#include "ThingSpeak.h"

int AC = 0;

int lastAC = 0;

int turatie = 0;

unsigned long myChannelNumber = 22793;

const char * myWriteAPIKey = "cheie";

const char* ssid = "HUAWEI-SQ77";

const char* password = "parola";

#define DHTPIN D4

#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);

WiFiClient client;

Adafruit_INA219 ina219;

void setup() {

Serial.begin(115200);

delay(10);

dht.begin();

WiFi.begin(ssid, password);

Serial.println();

Serial.print("Connecting to ");

Serial.println(ssid);

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {

delay(5000);

Serial.print(".");

}

Serial.println("");

Serial.println("WiFi connected");

ina219.begin();

Serial.println("Measuring voltage and current with INA219 ...");

ThingSpeak.begin(client);

Serial.println("ThingSpeak connected");

}

void loop() {

float t = dht.readTemperature();

float h = dht.readHumidity();

delay(5);

if (isnan(h) || isnan(t)) {

Serial.println("Failed to read from DHT sensor!");

return;

}

float shuntvoltage = 0;

float busvoltage = 0;

float current_mA = 0;

float loadvoltage = 0;

float power = 0;

float turatiei = 0;

float current_A = 0;

for(int i=0;i<2500;i++)

{

shuntvoltage = shuntvoltage + ina219.getShuntVoltage_mV();

busvoltage = busvoltage + ina219.getBusVoltage_V();

current_mA = current_mA + ina219.getCurrent_mA();

AC = digitalRead(5);

// Se contorizeaza trecerea prin "0"

if ((AC == LOW) && (AC != lastAC ))

{

turatiei++;

}

lastAC= digitalRead(5);

delay(5);

}

turatie=turatiei*60/8/15;

shuntvoltage = shuntvoltage/2500;

busvoltage = busvoltage/2500;

loadvoltage = busvoltage + (shuntvoltage / 1000);

current_A = current_mA/2500/1000;

power = loadvoltage * current_A;

Serial.print("Bus Voltage: "); Serial.print(busvoltage);

Serial.println(" V");

Serial.print("Shunt Voltage: "); Serial.print(shuntvoltage);

Serial.println(" mV");

Serial.print("Load Voltage: "); Serial.print(loadvoltage);

Serial.println(" V");

Serial.print("Current: "); Serial.print(current_A);

Serial.println(" A");

Serial.print("Power: "); Serial.print(power); Serial.println(" W");

Serial.println("");

Serial.print("Temperature: ");

Serial.print(t);

Serial.print(" degrees Celsius Humidity: ");

Serial.print(h);

Serial.println("");

ThingSpeak.setField(1,loadvoltage);

ThingSpeak.setField(2,current_A);

ThingSpeak.setField(3,power);

ThingSpeak.setField(4,turatie);

ThingSpeak.setField(5,t);

ThingSpeak.setField(6,h);

ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

Serial.println("Send to ThingSpeak");

}

Contine suplimentar cod pentru integrarea unui senzor de temperatura / umiditate DH11 si pentru determinarea turatiei.

VAWT

Turbine eoliene verticale

Arhive lunare: februarie 2017

Windtracker Savonius

O descriere amanuntita a turbinei eoliene VAWT o gasiti in brevetul de inventie US20130170986.

Mariah WindSpire

O descriere amanuntita a turbinei eoliene VAWT o gasiti in brevetul de inventie US20090097981

Darrieus Phi (Φ)

WEMOS D1 MINI

Sunt necesare doar o placa de dezvoltare cu WEMOS D1 MINI ~2.6 $ si un senzor de curent INA 219 ~1.7$.

Codul necesar :