[Gaware, 4(2): February, 2015] ISSN: 2277-9655 Scientific Journal Impact Factor: 3.449 (ISRA), Impact Factor: 2.114 http: // www.ijesrt.com(C)International Journal of Engineering Sciences & Research Technology 178 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY HARVESTING OF WATER FROM AIR USING HELICAL COIL Mr. Nilesh Ashok Gaware, Dr. Mariappam Dharmaraj Nadar, Mrs. Meeta Vedpathak Mechanical Department, Revera Institute of technology,kharghar,India Mechanical Department, Pillai Institute of Information Technology,Panvel,India ABSTRACT Water scarcity has become a worldwide issue in the current era, this issue is more complicated in the arid areas, where it rains rarely and there is hardly any freshwater source at all. Hence, there is a serious need to find new, sustainable, alternative ways to get drinking water. One of the most interesting methods to get clean water is harvesting humidity from air. Many new initiatives have been taken to develop this old way of getting water, and many technologies have potential to solve the challenge of getting a new, sustainable and renewable source of fresh water in desert areas. This paper presents a thermal process of cooling and dehumidifying the atmospheric air passing through helical coil and extracting water from it. The main objective of the paper is to design a thermal experimental setup as well as a helical coil capable of enchancing the cooling and dehumidifying process. It is known that the arid areas have a hot temperature, where as the underground soil is actually cooler. Hence, a pumping device that pushes the surrounding air with humidity under the ground to pass through pipes network where the humidity will start condensing on the internal walls of pipes, then, the water drops will leak from the pipes directly to the roots of plants in the field or can be used for drinking purpose. KEYWORDS:Arid(dry area),Psychrometer, Thermocouple. INTRODUCTION The effects of climate change in India are accelerating at an alarming rate. In Maharashtra state many regions (Alert India, 2013) were experiencing severe drought in a century, which lasted for many years and resulted in irreversible damage to ecosystems, widespread wildlife decline and catastrophic bushfire conditions. Agriculture is detoriating due to severe drought. An alarming figure of one farmer a week were taking their own life, as years of drought resulted in failed crops, mounting debt and slowly decaying towns. Although the year 2013 has brought much needed rainfall to the area, other parts of India are continuing to suffer drought. The southwest corner of the country has experienced its driest year to date. Scientific projections indicate as temperatures continue to increase so too will the severity, frequency and duration of droughts worldwide. Extensive research into droughts revealed an increase in soil evaporation and trans-evaporation (plant and soil) due to the increasing temperatures. However, though the future seems to suffer from water scarcity, but the humanity will not give up and wait for that to happen. This paper concentrates on alternative way of getting water which can be considered as a new source of renewable water which can be used for irrigation or drinking purpose. The amount of water that can be harvested from thin air is reliable in most of the conditions even if it depends on the temperature and humidity at the place. Although the relative humidity in a certain place might be relatively low, it is still possible to get some fresh water out of it by using the right humidity harvesting method. The method of harvesting water from thin air can cover people basic needs of drinking water in the dry areas, and especially is the coastal areas where there is a high humidity, but during summer season people experience scarcity of water. This way can support the traditional fresh water sources in the targeted areas, and in the future it might even be able to replace certain methods of getting fresh water such as desalination of seawater if it is well developed. There are various atmospheric water harvesting technologies that exist today, but most are high-tech and expensive methods not ideal for the rural farmer market. In this project nontraditional water harvesting method is use to extract water from atmospheric air. The