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Two day workshop on rainwater harvesting and energy conservation The workshop organized by Delhi Productivity Council at Hotel Le Meridian covered the following subjects: Ground water scenario in India and artificial recharge need and planning The increasing stress on ground water is causing alarm to the development planners all over and in cities in particular which are primarily responsible for sorry state of affairs. The unplanned construction activities and paving of areas is adding to the concerns among the planners about sustainability of ground water resources and in turn economy of the country. Ground water being hidden source needs to be developed with proper understanding of its occurrence in time and space. The ground water management on scientific lines has become the need of the time for sustainability of this vital resource. The ground water resource and its development potential in India is indicated in the sheet enclosed. The development of ground water needs to be supplemented by suitable rainwater harvesting and artificial recharge to ground water measures to augment the ground water resources. The artificial recharge in urban areas can be of high benefit as under : Improvement in infiltration and reduction in run-off Improvement in groundwater levels and yields Reduces strain on special village panchayats / municipal / municipal corporation water supply Improvement in groundwater quality Estimated quantity of additional recharge from 100 sqm roof top area is 55000 litres The adoption of rainwater harvesting is being promoted by ministry through various platforms. The sketch showing the rainwater harvesting well is also enclosed in this respect. Renewal energy and its uses along with conservation aspects related to building environment The energy is the pre requisite for developments in the country. The oil which is mainly imported from other countries leads to tremendous strains on the treasury besides involving geopolitics of the regions. On the other hand the oil prices keep on increasing and the oil reserves declining which are throwing the challenging task to meet the energy requirements. The coal reserves are also declining and country has no choice but to source the non-conventional methods of energy so as to keep the pace of development going in the country. The anticipated shortage of primary sources of energy has moved the authorities to bank upon the local resources of energy such as solar, wind, biomass etc. The sun being available in plenty in India, the efforts are being made to harness the source of energy to the maximum extent possible. The government and private sectors are fully engaged in development of solar and wind energy. The solar energy can be produced and used in domestic and industrial purposes such as heating of waters, lighting, hotels, dairies etc. As the sun is not available throughout the day, efforts are being made to develop thermal storage systems. The emphasis on solar energy is also a key factor in containing emission of CO2 in urban areas which is a matter of great concern now a days because of increasing global warming. There is need to ensure demand side as well as supply side managements. The ecological foot print of the country is governed by the available energy, food, land and travel. The organization such as Bureau of Energy Efficiency (BEE), The Energy and Research Institute (TERI), Indian Green Building Council (IGBC) etc. are actively engaged in promoting renewal energy and conservation of energy leading to green buildings and zero net energy buildings. HVAC system and energy optimization in Buildings About 40% of the total energy is consumed in residential complexes and 16% out of this is consumed in HVAC system. Indian Society for Heating, Refrigeration and Air-conditioning Engineers (ISHRAE) has outlined the important factors in order to effect energy conservation in buildings without compromising on the comfort conditions. The orientation of buildings, materials, shading of walls and windows, roof shading, pre-cooling of fresh air, use of day light etc. can result in saving of energy to a great extent. Besides use of proper HVAC equipment is also a key factor in effecting saving of energy. The VRV system of air-conditioning presently is being used for the purpose. In addition the Government agencies are also encouraging and monitoring conservation of energy by way of providing suitable ratings to the AC equipment. Market size of air-conditioning is Unitary system such as window, split and ductable units – 48% Central plants – 52% The comfort conditions are, now a days, specified between 23°C to 26°C to ensure energy conservation. B. S. Juneja HOD (Power) HOD (HRD)