Fan Pad Poly House

Fan Pad Polyhouse Designed to meet the growing needs of farmers, we come with a Fan Pad Poly House. This offered poly house offers an ideal combination of humidity, temperature, and light intensity that enables the healthy growth of the plants inside the structure. Provided with openings that help release the hot air, this polyhouse is best suited for humid and hot weather conditions.

       Hi-Tech Poly House with controlled. In this system, Cooling pads are mounted in one end wall or sidewall of the Polyhouse. They are supplied with water from a pipe above the pads and excess water is collected in a gutter at the bottom. Air drawn through the wet pads by slow axial fans mounted in the opposite end wall or sidewall is saturated and cools the greenhouse.

        Hi-Tech Polyhouse with fan and pad control is used in those systems where high-efficiency cooling is required. It can be used for many different cooling purposes but is particularly suitable for cooling of greenhouses where higher air velocity is required.

Evaporative cooling, which uses the heat in the air to evaporate water from plants and other wetted surfaces can be used to cool the greenhouse as much as 10 to 12oC below the outside temperature. Although evaporative cooling is most effective in dryer climates, such as suitable for North, Central, and Western parts of India.

The heat that is needed for the evaporation is taken from the air itself. The air that leaves the pad is therefore cooled and humidified simultaneously without any external energy supply for the evaporation process. This type of Green House is suitable for the Secondary Hardening of Banana, Vegetable seedlings & growing Strawberry cultivation, etc.

 

Fan Pad Poly Houses: Principles and Benefits

I. Principles of Fan Pad Poly Houses

• Fan pad poly houses are greenhouse structures designed to provide a controlled environment for plant growth.
• The key principle behind fan pad poly houses is the use of evaporative cooling to regulate temperature and humidity.
• The structure consists of polyethylene or polycarbonate panels that allow sunlight to penetrate while retaining heat.
• Evaporative cooling pads made of porous material are installed on one or more greenhouse sides.
• Fans force air through the wet pads, causing water evaporation and lowering the air temperature.
• The cooled air is then circulated inside the greenhouse, creating a favorable climate for plant growth.

II. Benefits of Fan Pad Poly Houses

• Enhanced temperature control: Fan pad poly houses help mitigate high temperatures, providing a cooler environment for plants.
• Increased humidity: Evaporative cooling pads increase humidity levels, preventing dehydration and creating optimal growing conditions.
• Energy efficiency: Compared to other cooling methods, fan pad poly houses consume less energy while maintaining the desired temperature and humidity levels.
• Cost-effective: Fan pad poly houses’ initial investment and operational costs are often lower than other greenhouse cooling systems.
• Versatility: Fan pad poly houses uses for various crops and are particularly beneficial in hot and dry climates.
• Crop protection: These structures offer protection against extreme weather conditions, pests, and diseases.
• Improved crop quality and yield: The controlled environment ensures better crop growth, higher yields, and improved quality.
• Sustainability: Fan pad poly houses promote sustainable agriculture practices by optimizing resources such as water and energy.

Farmers and horticulturists can create an environment conducive to plant growth, enabling year-round cultivation and higher productivity by implementing fan pad poly houses. The principles of evaporative cooling and numerous benefits make fan pad poly houses popular for modern agriculture.

Design Considerations for Fan Pad Poly Houses

I. Structural Design

• Structural integrity: The fan pad poly house should be design to withstand environmental loads, such as wind and snow, ensuring its stability and longevity.
• Material selection: Choose high-quality materials for the greenhouse structure, such as strong and durable polyethylene or polycarbonate panels.
• Roof design: Opt for a roof shape that allows efficient rainwater drainage and prevents water accumulation, reducing the risk of structural damage.
• Ventilation system integration: Incorporate vents or windows into the design to facilitate natural ventilation when cooling is not requires.

II. Fan and Pad System Design

• Proper fan and pad sizing: Calculate the required fan and pad sizes based on the greenhouse area, crop type, and desired cooling capacity.
• Fan and pad placement: Strategically position the fans and evaporative cooling pads to ensure even air distribution throughout the greenhouse.
• Airflow management: Design the layout and orientation of the greenhouse to optimize airflow and minimize dead zones.
• Control system integration: Include an automated control system that regulates fan speed and pad moisture levels to maintain the desired climate conditions.
• Water supply and drainage: Plan for a reliable water supply and efficient drainage system to ensure the proper functioning of the evaporative cooling pads.

III. Environmental Control Systems

• Heating system: Consider the need for a heating system to maintain suitable temperatures during colder periods.
• Shading system: Integrate a shading system, such as shade cloths or retractable screens, to control light intensity and prevent heat buildup.
• Ventilation system: Besides the fan and pad system, incorporate additional ventilation options, such as ridge vents or side vents, for optimal airflow management.
• CO2 enrichment: Depending on the crop requirements, design the greenhouse to allow for carbon dioxide enrichment to enhance plant growth.

IV. Accessibility and Maintenance

• Entry points: Provide convenient access points for workers and equipment, ensuring easy movement within the greenhouse for maintenance and crop management.
• Maintenance considerations: Incorporate features that simplify maintenance tasks, such as easy access to fans, pads, and water supply systems.
• Safety measures: Include safety features, such as emergency exits, fire extinguishers, and proper electrical wiring, to ensure a safe working environment.

By carefully considering these design aspects, fan pad poly houses can be customized to suit specific crop requirements, local climate conditions, and operational needs. This ensures optimal performance, productivity, and longevity of the greenhouse structure.

 

Comparison of fan pad poly houses with other greenhouse structures:

Here’s a comparison table outlining the key features of fan pad poly houses compared to other greenhouse structures:

Features	Fan Pad Poly Houses	Glass Greenhouses	Plastic Film Greenhouses
Structure	Polyethylene or polycarbonate panels	Glass panels	Lightweight frame covered by plastic film
Temperature Control	Evaporative cooling system	Good insulation	Limited insulation
Humidity Control	Effective humidity management	Moderate control	Minimal control
Ventilation	Additional ventilation systems	Roof and side vents	Limited ventilation
Light Transmission	Moderate light transmission	Maximum light transmission	Adequate light transmission
Design Flexibility	Flexible sizing and configurations	Limited flexibility	Flexible sizing and configurations
Aesthetics	Functional design	Visually appealing	Basic appearance
Cost	Moderate cost	Higher cost	Lower cost
Lifespan	Long lifespan	Long lifespan	Shorter lifespan
Maintenance	Moderate maintenance requirements	Moderate maintenance requirements	Regular maintenance required

Please note that the information provided in the table is a general comparison, and individual greenhouse designs may vary.

 

Maintenance and Upkeep of Fan Pad Poly Houses:

Regular maintenance and upkeep are essential to ensure the optimal performance and longevity of fan pad poly houses. Here are some key aspects to consider:

1. Evaporative Cooling System Maintenance:

   • Clean and inspect evaporative cooling pads regularly to prevent clogging and mineral buildup.
   • Replace pads if they are damaged or have lost their effectiveness.
   • Check and maintain proper water flow and distribution to the pads.
   • Clean and lubricate fans to ensure smooth operation.

2. Ventilation and Airflow Management:

   • Regularly check and clean vents, windows, and other ventilation openings to ensure unobstructed airflow.
   • Inspect and maintain any mechanical ventilation systems, such as fans or louvers.
   • Adjust ventilation settings according to the specific climate and crop requirements.

3. Structural Maintenance:

   • Inspect the greenhouse structure for any signs of damage, including cracks, leaks, or loose panels.
   • Repair or replace damaged or worn-out components promptly.
   • Check the integrity of the frame, including support structures and anchor points.
   • To prevent drafts and heat loss, ensure that doors, windows, and other openings are properly sealed.

4. Irrigation and Water Management:

   • Regularly check the irrigation system to ensure proper water supply to plants.
   • Clean and maintain filters, drippers, and sprinklers to prevent clogging.
   • Monitor water quality and adjust nutrient levels as needed.
   • Properly manage and recycle water to minimize waste and maintain sustainability.

5. Cleaning and Sanitation:

   • Regularly clean the interior surfaces of the greenhouse to remove dirt, debris, and pests.
   • Disinfect the greenhouse periodically to control the spread of diseases and pathogens.
   • Keep the surrounding area clean to minimize the introduction of pests or contaminants.

6. Climate Control Monitoring:

   • Regularly calibrate and test climate control systems like temperature and humidity sensors.
   • Monitor and adjust climate settings based on crop requirements and external weather conditions.
   • Keep records of climate data and performance to identify any deviations or issues.

7. Safety Measures:

   • Ensure that safety equipment, such as fire extinguishers, emergency exits, and electrical systems, are properly maintained and in good working condition.
   • Train staff on safety protocols and procedures for handling greenhouse equipment and chemicals.

Following these maintenance practices, fan pad poly houses can operate efficiently, optimize plant growth, and extend their lifespan. Regular inspections, timely repairs, and attention to climate control and sanitation will help maintain a healthy and productive growing environment.