Solar Energy Potential in Qom, Iran

Qom, Iran, located at coordinates 34.642, 50.8737 in the Northern Sub Tropics, offers significant potential for solar energy generation, though with seasonal variations. This holy city's climate and geographical position create both opportunities and challenges for solar photovoltaic (PV) installations. The solar energy production in Qom follows a predictable seasonal pattern. Summer stands out as the most productive season, with an impressive 8.44kWh per day for each kilowatt of installed solar capacity. Spring follows as the second most productive season, generating 6.56kWh/day. Autumn production decreases to 5.18kWh/day, while winter shows the lowest output at 3.81kWh/day. This seasonal pattern means that a solar installation in Qom would produce more than twice as much energy in summer compared to winter months. The substantial difference highlights the importance of proper system sizing to ensure adequate energy supply throughout the year, particularly during the less productive winter period.

Optimal Panel Installation

For fixed solar panel installations in Qom, the ideal angle to maximize year-round production is 30 degrees facing South. This specific tilt optimizes annual energy capture by balancing seasonal sun positions throughout the year. Proper orientation at this angle can significantly improve the overall efficiency of the system compared to flat or incorrectly angled installations.

Environmental Challenges

Several environmental factors in Qom can impact solar energy production:

• Dust and sand accumulation is a significant concern in this semi-arid region. Dust can reduce panel efficiency by 10-40% if not regularly cleaned.
• High summer temperatures may decrease panel efficiency, as most solar panels lose efficiency above 25°C.
• Occasional winter fog and air pollution from nearby industrial activities can reduce solar radiation reaching the panels.

Preventative Measures

To maximize solar production in Qom's environment, several preventative measures should be considered: Installing automated cleaning systems or implementing regular manual cleaning schedules can mitigate dust accumulation. Raising panels higher off the ground can reduce dust collection, while anti-soiling coatings provide additional protection. For temperature-related efficiency losses, ensuring adequate airflow beneath the panels is crucial. Installing panels with better temperature coefficients and using mounting systems that allow air circulation can help maintain efficiency during hot summer months. Despite these challenges, Qom's location receives abundant sunshine, particularly from late spring through early autumn, making it generally favorable for solar energy production with proper system design and maintenance protocols in place.

Note: The Northern Sub Tropics extend from 23.5° latitude North up to 35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 29 locations across Iran. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Iran by location

Solar output per kW of installed solar PV by season in Qom

Seasonal solar PV output for Latitude: 34.642, Longitude: 50.8737 (Qom, Iran), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:

 

Ideally tilt fixed solar panels 30° South in Qom, Iran

To maximize your solar PV system's energy output in Qom, Iran (Lat/Long 34.642, 50.8737) throughout the year, you should tilt your panels at an angle of 30° South for fixed panel installations.

As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.

We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.

Seasonally adjusted solar panel tilt angles for Qom, Iran

If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Qom, Iran. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 30° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
18° South in Summer	39° South in Autumn	50° South in Winter	27° South in Spring

Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.

This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.

Calculate solar panel row spacing in Qom, Iran

We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Qom, Iran.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. Minimum Spacing:
   We add the shadow length to the horizontal space occupied by tilted panels.

This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.

Topography for solar PV around Qom, Iran

Qom, Iran is situated in a topographically diverse region characterized by a mixture of arid plains and mountainous terrain. The city itself sits in a basin at an elevation of approximately 900 meters above sea level. To the north and northeast of Qom lie the southern reaches of the Alborz mountain range, creating a dramatic backdrop to the landscape. These mountains form a natural boundary and influence the local climate patterns. To the south and southwest of Qom extends the northern edge of the central Iranian plateau, featuring mostly flat to gently rolling terrain. This area gradually transitions into the vast salt desert known as Dasht-e Kavir (Great Salt Desert). The landscape in this direction is marked by sparse vegetation, salt flats, and occasional rocky outcrops.

Surrounding Desert Areas

The desert regions surrounding Qom are particularly noteworthy. The terrain is predominantly flat with occasional undulations and is characterized by salt crusts, clay plains, and sandy areas. These desert expanses receive minimal precipitation throughout the year and experience significant temperature variations between day and night. Small seasonal streams and drainage channels cut across the landscape, most of which remain dry except during brief rainy periods. The soil in many areas contains high concentrations of salt and other minerals, creating distinctive white patches visible from aerial perspectives.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic installations, the desert plains to the south and southeast of Qom present the most favorable conditions. These areas offer several advantageous characteristics for solar energy development: The flat terrain requires minimal land preparation, reducing construction costs and environmental disruption. The open expanses provide ample space for extensive arrays without natural obstructions that might cast shadows. The areas south of Qom extending toward Kashan and southeast toward the Dasht-e Kavir desert have minimal competing land uses due to their arid nature and limited agricultural potential. These regions experience minimal cloud cover throughout the year, maximizing solar exposure. The relatively stable ground conditions in these desert plains are generally suitable for the installation of mounting structures required for solar panels. The sparse population density in these areas minimizes potential land-use conflicts and simplifies the acquisition of large continuous tracts of land necessary for utility-scale installations.

Topographical Considerations

While the flat desert areas are generally ideal, potential developers should be aware of certain topographical challenges. Some areas may be subject to occasional flooding during rare heavy rainfall events, particularly in natural drainage channels. Wind-blown sand can accumulate in dunes in certain locations, potentially requiring special design considerations for panel mounting and maintenance. The mountainous areas to the north of Qom, while receiving good solar radiation, present more challenging terrain for large-scale installations due to slopes, uneven surfaces, and more difficult access for construction and maintenance equipment. The northwestern areas toward Tehran feature more varied topography with hills and developed land, making them less suitable for extensive solar farms compared to the open desert regions to the south and southeast. In conclusion, the expansive desert plains south and southeast of Qom offer the most promising topographical conditions for large-scale solar PV development, combining favorable terrain with minimal competing land uses and optimal natural conditions for solar energy harvesting.

Iran solar PV Stats as a country

Iran ranks 52nd in the world for cumulative solar PV capacity, with 456 total MW's of solar PV installed. This means that 0.40% of Iran's total energy as a country comes from solar PV (that's 40th in the world). Each year Iran is generating 5 Watts from solar PV per capita (Iran ranks 80th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Iran?

Yes, there are incentives for businesses wanting to install solar energy in Iran. The Iranian government has implemented a number of policies and programs to encourage the development of renewable energy sources, including solar energy. These include tax exemptions, subsidies, and other financial incentives such as low-interest loans. Additionally, the government has set up a Renewable Energy Organization (SUNA) which provides technical assistance and support for businesses interested in installing solar systems.

Do you have more up to date information than this on incentives towards solar PV projects in Iran? Please reach out to us and help us keep this information current. Thanks!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

Compare this location to others worldwide for solar PV potential

The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.

However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.

Helping you assess viability of solar PV for your site

Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide

Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.