Building cooling is accomplished through the significant usage of air conditioners. Mechanically powered gadgets provide thermal comfort, but they harm the environment by consuming more energy. As a means of decreasing environmental degradation, building cooling systems that are both energy-efficient and environmentally friendly are becoming increasingly significant. Evaporative cooling, a common passive cooling method, has the potential to meet energy demand while also addressing global climate issues. Traditional direct evaporative cooling achieves sensible air cooling through continuous water circulation over the cooling pad. Despite its ease of use, its use is limited due to the pad material issue and water stagnation in the sump. Furthermore, the pump's continuous operation increases the quantity of electrical energy used. The goal of this study is to replace the pump and sump with a porous substance that serves as a water storage medium. Experiments are being done in Vellore, India, to investigate the efficacy of a vermicompost-based evaporative cooling system under three distinct RH situations (low, medium, and high). The cooling capacity, efficacy, and water evaporation rate of a direct evaporative cooling system are all measured to determine its performance. Vermicompost is utilised to replace the pump and sump because of its great water retention qualities. There's no need to change materials all the time. The vermicompost, on the other hand, is regenerated using a solar dryer at the end of the experiment. The flow of hot air over the vermicompost also prevents any mould spores in the air from being transferred to the vermicompost. According to the data, vermicompost produces a temperature reduction of 9.5°C when the relative humidity is low. Vermicompost also adds to a 21.7 percent energy decrease by eliminating the pump. As a result, vermicompost may be a more energy-efficient alternative to the pad-pump-sump combination used in classic evaporative cooling systems. In addition, combining a solar-assisted dryer with a direct evaporative cooling system can create a healthy and long-lasting indoor atmosphere. This method could open the path for environmentally friendly year-round thermal management of building cooling applications.
Author(S) Details
Sujatha Abaranji
Department of Mechanical Engineering, Thanthai Periyar Government Institute of Technology, Vellore 632002, Tamil Nadu, India.
Karthik Panchabikesan
Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, Canada.
Velraj Ramalingam
Department of Mechanical Engineering, Institute of Energy Studies, Anna University, Chennai 600025, Tamil Nadu, India.
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