Introduction


The Small Polyhouse Climate Control Structure is designed to maintain suitable environmental conditions for plant growth and protected cultivation. The structure helps control temperature, humidity, and airflow inside the chamber using cooling pads, exhaust fans, and proper ventilation systems.
The main aim of this project is to maintain a temperature between 25–27°C and humidity above 75% for better plant growth and climate stability.

Objectives


To maintain temperature between 25–27°C
To maintain humidity above 75%
To improve airflow using exhaust fans
To monitor environmental conditions using a data logger
To create a controlled environment for plants


Methodology


Shade-net material is used for outer covering
Cooling pads are used for temperature reduction
Three exhaust fans are used for ventilation
Water circulation supports humidity control
Digital data logger is used for temperature and humidity monitoring

Working Components of the Small Polyhouse Climate Control Structure

  1. Base Structure Preparation
    A compact polyhouse-type structure was prepared using a strong support frame and covered with green shade-net material. The tunnel-shaped design helps reduce direct sunlight and improves internal climate management.
  2. Cooling Pad Installation
    Cooling pads were installed on the sides of the structure to reduce internal temperature and increase humidity levels. Water passes through the cooling pads, and air moving through them becomes cooler and more humid.
  3. Exhaust Fan Installation
    Three axial exhaust fans were installed to improve airflow and ventilation inside the structure. These fans remove hot air from inside the polyhouse and help maintain balanced temperature and humidity conditions.
    Fan Details:
    Fan Type: Axial Fan
    Model: FM12038A2HSL
    Brand: Jollex’s
    Voltage: 220/240V AC
    Frequency: 50/60 Hz
    Current: 0.18A
    Power: 33W
    Fan Size: 120 × 120 × 38 mm
    The installed fans provide continuous air circulation and support efficient cooling inside the structure.
  4. Data Logger and Monitoring System
    A digital data logger was installed inside the structure to continuously monitor and display temperature and humidity data. The device helps in recording environmental conditions and observing system performance in real time.
    The data logger displays:
    Temperature readings
    Humidity readings
    Continuous environmental data monitoring

Current Status
The structure preparation, cooling pad setup, exhaust fan installation, and data logger setup have been completed successfully. Environmental testing is currently in progress to achieve stable temperature and humidity conditions inside the polyhouse.
Current readings recorded by the data logger:
Temperature: 25.3°C
Humidity: 41.5%
The present temperature is within the target range of 25–27°C, but the humidity is still below the desired level of 75%+. Further improvements in cooling pad efficiency, water circulation, and airflow management are being carried out to increase humidity and stabilize the internal climate conditions of the polyhouse.