Climate: Karachi, Pakistan the summers are hot, humid and windy. The peak seasonal temperatures are from early April to mid-July. Winters are moderate and dry with temperature never falling below 55F. The coolest period is from mid-December to mid-February. Over the course of the year, the temperature typically varies from 55°F to 94°F and is rarely below 55°F or above 95°F.
Solar Power Conditions: The seasonal variation for peak solar power efficiency is significant, with the best period from early April to early July and the least favorable period from mid-November to late January. Peak power period is in May with energy levels over 7 kW per hour of daylight per square meter or up to 175 kW per day per square meter. During the low light period from mid-November to early February, energy drops to less than 60% of its peak.
Wind Power Conditions: Karachi region is generally favorable to wind power systems, with significant variation based on immediate location of the wind tower. Wind speed is measured at 10 Meters above ground to minimize variation and improve accuracy of predictions. The most favorable conditions for wind powered systems are from mid-April to late September with wind speeds over 17 KPH with peak sustained speeds of up to 23 KPH. The least favorable period is from late October to mid-January with sustained wind speeds as low as 11 kph.
Humidity: Karachi experiences significant seasonal variation in relative humidity, from sustained very high humidity for nearly +9 months from mid-March to early November and very low humidity from early December to late February. This creates exceptionally favorable conditions for WaterSeer deployment for almost 75% of the year and moderate to poor conditions for the remaining period.
WaterSeer Yield Curve: The WaterSeer yield curve is below. Yield is based on WaterSeer Sonoma model third party testing and trials under a wide variety of controlled and field conditions. Monthly yield is on the left vertical axis. The bottom horizontal axis is the average temperature. The Relative Humidity % (RH) is color coded in 10% increments.
Karachi area estimated yield: Karachi, Pakistan, particularly coastal areas, is an excellent location for WaterSeer deployment. Quarterly yield below is estimated for a small ten-unit WaterGrid installed with the geothermal module. Three types of installations are shown:
Outside, such as a garden or greenspace in the Karachi region
Hydroponics grow-house or vertical farm
Coastal deployment, such as near ocean facilities and off-shore islands
Sources and Data: Weather data and models are derived from historical weather reports January 1, 1980 to December 31, 2016. Yield estimate is from Sonoma Yield Forecast Model. Data graphics are from weatherspark.com and waterseer.org.
Disclaimer: Weather is unpredictable and weather data and analysis is probabilistic. Every effort has been made to assure this assessment is accurate and error free. It is published as is without any assurance as to its suitability for any purpose.