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Energy Conservation in Buildings using Thermal Energy Storage Dr Anant Shukla Technical Expert – TRIGEN Indo-German Energy Program (IGEN) German Technical.

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Presentation on theme: "Energy Conservation in Buildings using Thermal Energy Storage Dr Anant Shukla Technical Expert – TRIGEN Indo-German Energy Program (IGEN) German Technical."— Presentation transcript:

1 Energy Conservation in Buildings using Thermal Energy Storage Dr Anant Shukla Technical Expert – TRIGEN Indo-German Energy Program (IGEN) German Technical Cooperation (GTZ) Pune, 25 June 2009

2 Contents Energy use in buildings Energy Conservation Skills Objective 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-TRIGENpage 2

3 Energy use in buildings Electricity 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-TRIGENpage 3

4 Indias Energy Scenario © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 4

5 Energy Conservation skills Manage 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-TRIGENpage 5

6 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-TRIGENpage 6

7 Objective of Thermal Energy Storage To 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-TRIGENpage 7

8 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-TRIGENpage 8

9 Classification of Thermal Energy Storage materials © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 9

10 Comparison of storage capacities © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 10

11 How Thermal Energy Storage work? © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 11

12 PCM Energy stored as function of temperature © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 12

13 Thermal Energy Storage Thermal 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-TRIGENpage 13

14 Thermal Energy Storage for peak load shaving Cool 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-TRIGENpage 14

15 Thermal Energy Storage in Telecom Shelters A 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-TRIGENpage 15

16 Disadvantages of using DGs Though 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-TRIGENpage 16

17 Advantages of using Thermal Energy Storage Thermal Energy Storage can provide a reliable solution to power failures. About 280 kg of Thermal Energy Storage material maintain temperature at 28 - 29 °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-TRIGENpage 17

18 Benefits of using thermal energy storage Reduces Peak Demand at most critical time 20-40% Reduces consumers energy costs 10-20% May reduce energy usage at the building up to 14% Reduces source energy usage at power plant 8-34% Reduces emissions up to 50% Increases Load Factor of Generation up to 25% Provides operational flexibility © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 18

19 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-TRIGENpage 19

20 Thank you © GTZ, Dr Anant Shukla, IGEN-TRIGENpage 20 Contact: Dr. Anant Shukla Deutsche Gesellschaft fuer Technische Zusammenarbeit (GTZ) GmbH Bureau of Energy Efficiency, Ministry of Power 4th Floor, Sewa Bhawan, R. K. Puram, Sector 1 New Delhi – 110066 Cell: +91 - 96543 06 007 Ph.: +91 - 11 - 2617 9699 Fax: +91 - 11 - 2617 8352 E-mail: anant.shukla@gtz.de


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