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Energy Conservation in Buildings using Thermal Energy StorageDr Anant Shukla Technical Expert – TRIGEN Indo-German Energy Program (IGEN) German Technical Cooperation (GTZ) Pune, 25 June 2009
Contents Energy use in buildings Energy Conservation SkillsObjective of Thermal Energy Storage Use of Thermal Energy Storage in buildings Types of Thermal Energy Storage Applications of Thermal Energy Storage © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Energy use in buildingsElectricity is used for Air Conditioning in commercial buildings during peak and non-peak hours. Electricity is not reliable in most parts of country. ACs not set at desired temperatures for human comfort. Air leakages in buildings leads to loss of thermal energy. Use of Diesel Generator as a backup for air-conditioning and lighting during power failures. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
India’s Energy Scenario© GTZ, Dr Anant Shukla, IGEN-TRIGEN
Energy Conservation skillsManage efficiently the utilization of energy resources, upgrade hardware and employ cleaner and most efficient technologies. Train employees to make company the pace settler in the area of energy conservation. Carry out regular internal and external audits to identify areas of improvement. Benchmark continuously the performance against the best in the country. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Promote awareness among all members of the large company family. Enrich our experience on energy conservation by exchange of ideas with other organizations. Promote awareness among all members of the large company family. Prepare and Undertake a Detailed Project Implementation Plan. Implement a Staff Awareness and Training Program. Annual Review. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Objective of Thermal Energy StorageTo achieve and maintain optimum energy use and utilization, of storage during non-peak hours and: To minimize energy cost/wastage without affecting production & quality. To minimize environmental effects. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
What are thermal energy storage devices/ materials?Thermal Energy Storage materials/devices store heat during peak power operation and release the same, during reduced power operation The energy storage devices may include: Sensible heat storage – heat capacity Latent heat storage – phase change Magnetic storage Super capacitors Chemical storage © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Classification of Thermal Energy Storage materials© GTZ, Dr Anant Shukla, IGEN-TRIGEN
Comparison of storage capacities© GTZ, Dr Anant Shukla, IGEN-TRIGEN
How Thermal Energy Storage work?© GTZ, Dr Anant Shukla, IGEN-TRIGEN
PCM Energy stored as function of temperature© GTZ, Dr Anant Shukla, IGEN-TRIGEN
Thermal Energy StorageThermal Energy Storage can be used in: Air Conditioning Solar Thermal Storage Concentrated Solar Power Cogeneration Trigeneration Waste Heat Recovery District Heating & Cooling Food industry Textiles, etc © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Thermal Energy Storage for peak load shavingCool storage technology can be used to significantly reduce energy costs by allowing energy-intensive, electrically driven cooling equipment to be predominantly operated during off-peak hours when electricity rates are lower. In addition, some system configurations result in lower first costs and/or lower operating costs compared to non-storage systems. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Thermal Energy Storage in Telecom SheltersA thermal load of 2 kW is used for maintaining the temperature at 24 C inside a telecom shelter. During power failure the temperature is maintained by Diesel Generators. The DGs (15 – 25 kVA) used as backup are polluting and is not a viable solution for thermal backup. Total installed DGs over 1,99,000 towers is around 3000 – 5000 MVA. Approx. 2.7 Gl per month of diesel used as power backup in telecom shelters. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Disadvantages of using DGsThough DG sets seems to be a good solution to the problem of power shortage, using them poses several long-term issues: Harmful carbon emissions Expensive fuel Transporting a cumbersome task Pilferage during transit Regular maintenance (may not be easily available in rural areas) © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Advantages of using Thermal Energy StorageThermal Energy Storage can provide a reliable solution to power failures. About 280 kg of Thermal Energy Storage material maintain temperature at °C for up to 8 hrs under normal ambient conditions. Reduces carbon emissions up to 6.3 million tons per annum Save 2.5 billion liters of diesel per annum. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Benefits of using thermal energy storageReduces Peak Demand at most critical time % Reduces consumer’s energy costs % May reduce energy usage at the building up to 14% Reduces source energy usage at power plant % Reduces emissions up to 50% Increases Load Factor of Generation up to 25% Provides operational flexibility © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Conclusion Reliable and affordable energy storage is a prerequisite for using energy in an efficient way. Energy storage therefore has a pivotal role in the future. Energy storage is the most promising technology currently available to meet the ever increasing demand for energy. © GTZ, Dr Anant Shukla, IGEN-TRIGEN
Thank you Contact: Dr. Anant ShuklaDeutsche Gesellschaft fuer Technische Zusammenarbeit (GTZ) GmbH Bureau of Energy Efficiency, Ministry of Power 4th Floor, Sewa Bhawan, R. K. Puram, Sector 1 New Delhi – Cell: Ph.: Fax: © GTZ, Dr Anant Shukla, IGEN-TRIGEN
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