Eco-Cooler Pottery: Low-Energy Cooling Innovation from Porous Clay

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 Abstract

This article presents the development and experimental evaluation of Eco-Cooler Pottery, a low-energy indoor cooling system based on evaporative cooling through porous clay materials combined with assisted airflow and thermoelectric support. The system was designed to provide affordable and environmentally friendly cooling for small indoor spaces in tropical regions. Two prototype configurations—Eco-CoolBox and GuciCool Vertical—were fabricated using locally produced pottery and tested under real climatic conditions. Experimental results demonstrate an average indoor temperature reduction of 3–5 °C compared to ambient conditions, with minimal electrical power consumption. The findings indicate that Eco-Cooler Pottery is a technically viable, socially inclusive, and environmentally sustainable cooling solution suitable for community-based replication.

1. Introduction

In tropical regions, rising ambient temperatures and limited access to reliable electricity pose challenges for thermal comfort, particularly for low-income communities. Conventional air conditioning systems require high energy input and utilize refrigerants with significant environmental impact. Evaporative cooling offers an alternative approach, exploiting the latent heat of water evaporation to reduce air temperature with minimal energy consumption.

Eco-Cooler Pottery, developed by Konkret Energy, integrates traditional porous clay craftsmanship with basic airflow engineering and thermoelectric assistance. The objective of this study is to evaluate the cooling performance, environmental impact, and socio-economic relevance of this hybrid evaporative cooling system.

2. System Design and Configuration

Product Overview

1. Eco-CoolBox (Eco-PotCooler)

Design Characteristics:

  • Shape: Rectangular box (30 × 30 × 20 cm)

  • Material: Porous clay pottery with internal water cavities

  • Application: Small rooms, indoor gardens, and workspaces

Working Principle:

- A low-power blower pushes ambient air through a Venturi channel.

- Air passes over porous clay surfaces saturated with water.

- Cooling occurs through evaporative cooling, enhanced by water that is pre-cooled using a Peltier         thermoelectric module.

- Cooled air is distributed into the indoor space through ventilation outlets.



2. GuciCool Vertical

Design Characteristics:

  • Shape: Modified traditional clay jar (height 62 cm, base diameter 22 cm)

  • Material: Handcrafted porous pottery

  • Application: Decorative cooling unit suitable for living spaces

Working Principle:

- Warm air enters from the top through a blower.

- Air is cooled by contact with water, porous clay walls, and a Peltier module installed at the base.

- Cool air exits radially through side openings, distributing airflow evenly


Key Advantages

·  Energy Efficient: Operates on low electrical power (12 V blower + Peltier module).

·  Environmentally Friendly: No refrigerants, no freon, and no harmful chemicals.

·  Easy Replication: Can be manufactured manually by local pottery artisans.

·  Community Empowerment: Increases the economic value of traditional clay products.

·  Cultural Integration: Blends modern engineering with local artistic motifs.


3. Technical Performance Summary

·  Evaporative cooling capacity: ~31 W (with water evaporation rate ≈ 50 ml/hour)

·  Peltier cooling contribution: ~12 W (≈20% efficiency)

·  Average temperature reduction: ~3–5 °C below ambient temperature

·  Airflow rate: ~96 m³/hour

·  Ideal room volume: 10–15 m³


4. Experimental Methodology and Performance Evaluation

1. Eco-PotCooler (Morning Test)

  • Outdoor temperature range: 28.1 – 29.4 °C

  • Lowest indoor temperature achieved: 25.4 °C

  • Average temperature difference (outdoor vs indoor): ≈2.14 °C

  • Relative humidity increased from 74% to 79%, consistent with evaporative cooling behavior.

The gradual reduction in indoor temperature over time confirms stable and continuous cooling performance driven by water evaporation through porous clay surfaces.




2. Eco-CooLBox (Midday Test)

  • Outdoor temperature range: 30.2 – 30.6 °C

  • Lowest indoor temperature achieved: 25.7 °C

  • Maximum cooling effect: ≈4.8 °C below ambient

  • Relative humidity range: 64–70%, which is favorable for evaporative cooling.

These results indicate that Eco-CooLBox performs more effectively under moderate humidity conditions, aligning well with established evaporative cooling theory.




Temperature Rise After Deactivation

When the Eco Cooler was switched off:

  • Indoor temperature increased by ≈3.0 °C within 10 minutes.

  • Outdoor temperature increased by only ≈1.0 °C during the same period.

This rapid temperature rise demonstrates that the cooling effect is actively maintained by continuous evaporation and airflow. Once airflow and water evaporation stop, passive cooling disappears quickly.




5. Scientific Discussion and Literature Context

Eco-Cooler Pottery operates on the principle of latent heat of evaporation. Water absorbed in the porous clay structure migrates to the surface and evaporates, extracting heat from surrounding air. The addition of low-power blowers enhances mass transfer, while the Peltier module improves water cooling at the source.

Experimental results are consistent with previous studies:

  • Al-Homoud et al. (2005) reported indoor temperature reductions of 3–7 °C using evaporative cooling in hot climates.

  • Dilip & Garud (2017) demonstrated 4–8 °C cooling using pot-in-pot systems.

  • Kishore & Kumar (2018) found evaporative cooling efficiency improves significantly at relative humidity below 70%.

Eco-CooLBox test results (RH 64–70%) closely match these findings, reinforcing the scientific validity of the system.

6. Socio-Environmental Impact and Alignment with SDGs

Contribution to Sustainable Development Goals (SDGs)

Eco-Cooler Pottery directly supports multiple United Nations Sustainable Development Goals:

  • SDG 7 – Affordable and Clean Energy
    The system operates on low electrical power (12 V DC), making it suitable for off-grid or solar-powered applications.

  • SDG 11 – Sustainable Cities and Communities
    Provides localized, low-impact cooling for homes, micro-workspaces, and indoor gardens without increasing urban energy demand.

  • SDG 12 – Responsible Consumption and Production
    Utilizes locally sourced clay and manual production methods, reducing embodied energy and encouraging sustainable material use.

  • SDG 13 – Climate Action
    Eliminates the use of refrigerants such as freon and significantly reduces greenhouse gas emissions compared to conventional air conditioning.

  • SDG 8 – Decent Work and Economic Growth
    Enhances the economic value of traditional pottery by introducing functional innovation, creating new income streams for local artisans.


Community Empowerment Model

Eco-Cooler Pottery is intentionally designed for decentralized production. Local potters can manufacture the clay components using existing skills and tools, while simple electrical modules can be assembled through basic technical training. This model supports technology transfer, job creation, and resilience in rural and peri-urban communities.



7. Implications and Future Development

·  Eco-Cooler Pottery is a viable low-energy cooling solution for tropical regions.

·  Performance strongly depends on water supply and airflow continuity.

·  Future research should focus on:

·         Long-term durability of porous clay materials

·         Performance under varying climatic conditions (high vs low RH)

·         Optimization of airflow channels and Peltier integration


8. Conclusion

Eco-Cooler Pottery demonstrates that effective indoor cooling does not always require high energy consumption or complex technology. By combining traditional pottery, evaporative cooling principles, and simple electrical components, this innovation provides a sustainable, affordable, and culturally rooted solution for small-scale cooling needs.

At Konkret Energy, we believe that climate solutions should be accessible, replicable, and empowering—especially for local communities in tropical regions.

Eco-Cooler Pottery is not just a cooling device; it is a bridge between tradition, science, and sustainable innovation.



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