Domestic water is an important component of water demand and during the winter season a good portion of it is being used as hot-water everywhere in the world. To provide a sustainable solution to the domestic hot water supply it is imperative to utilize the naturally available resources as much as possible to minimize the generation of greenhouse gas and also to reduce the carbon foot print. Under favorable condition, the requirement of domestic water can be partially or totally fulfilled by rainwater harvesting of a dwelling or its surroundings. A different system of rain water harvesting especially in rural and peri-urban areas where rainfall is distributed throughout the year is likely to be effective in providing a sustainable solution in many ways. Traditional process of hot water production consumes enough energy coming out of fossil fuel, including coal, gas, and diesel, etc. which does not ensure a sustainable future. In the tropical zones the solar energy may be an effective alternative to this. The paper is an attempt to understand the feasibility of providing hot-water to the residents of a typical apartment house situated in a peri-urban area of the city of Agartala utilizing the solar energy and the rain water collected from a roof for satisfying the daily need of the hot water requirement of domestic purpose. In the present scenario the availability of usable water is very less. Moreover, the production of carbon dioxide and other greenhouse gasses is increasing day by day. In view of the above a different system of rain water harvesting is implemented to reduce the water crisis. For reduction of energy consumption and thereby reducing the uses of greenhouse gasses solar water heating technique has been used.

Rain water, RWH, Hot-water demand, solar energy, green building

This paper has presented a multi-objective model for Hot-water-supply system suitable for domestic usage. The system is easy to install &likely to provide a sustainable solution. The presented model proposes available area for rainwater harvesting and the installation of storage devices for using this water when it is required for the residential development. The model will satisfy the domestic demands as well as it will be considered as objective function for the minimization of the total annual cost associated to the fresh water and also the electrical energy consumption.

Somdeep Chakraborty, Pratiksha Ghosh, Kaberi Majumdar, Manish Paland Pankaj Kumar Roy (2023). An Energy efficient Approach of Developing Hot Water Supply System Suitable for a Residential Building Located in Peri Urban Area of Agartala City. International Journal on Emerging Technologies, 14(1): 59–65.