energy conservation in buildings using thermal energy storage dr anant shukla technical expert –...

Energy Conservation in Buildings using Thermal Energy Storage

Dr Anant ShuklaTechnical Expert – TRIGEN

Indo-German Energy Program (IGEN)

German Technical Cooperation (GTZ)

Pune, 25 June 2009

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-TRIGEN page 2

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.


India’s Energy Scenario


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.


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.


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.


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


Classification of Thermal Energy Storage materials


Comparison of storage capacities


How Thermal Energy Storage work?


PCM Energy stored as function of temperature


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


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.


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.


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)


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.


Benefits of using thermal energy storage

Reduces Peak Demand at most critical time 20-40% Reduces consumer’s 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


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.


Thank you


Contact:

Dr. Anant ShuklaDeutsche Gesellschaft fuer Technische Zusammenarbeit (GTZ) GmbHBureau of Energy Efficiency, Ministry of Power4th Floor, Sewa Bhawan, R. K. Puram, Sector 1New Delhi – 110066

Cell: +91 - 96543 06 007Ph.: +91 - 11 - 2617 9699Fax: +91 - 11 - 2617 8352

E-mail: [email protected]

energy conservation in buildings using thermal energy storage dr anant shukla technical expert –...

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