Optimization of Energy Saving Techniques in Air Conditioning Systems
Ch. Bhnau Prakash1, A.V. Ramana Rao2, M.Praveen3, M.N.V.S.A Sivaram. K4
1Ch.Bhanu prakash, Asst. Prof, Mechanical Engineering, JNTU Kakinada, Vishnu Institute of Technology, Bhimavaram, (A.P), India.
2A.V.Ramana Rao, Asst. Prof, Mechanical Engineering, JNTU Kakinada, Vishnu Institute of Technology, Bhimavaram, (A.P), India.
3M.Praveen, Asst. Prof, Mechanical Engineering, JNTU Kakinada, Vishnu Institute of Technology, Bhimavaram, (A.P), India.
4M.N.V.S.A Sivaram Kotha, Pursuing M. Tech (CAD,CAM) SRKR Engineering College Affiliated to Andhra University Vishakapatnam, (A.P), India.
Manuscript received on July 30, 2013. | Revised Manuscript received on August 05, 2013. | Manuscript published on August 30, 2013. | PP: 253-256 | Volume-2, Issue-6, August 2013. | Retrieval Number: F2056082613/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In a conventional air conditioning system, chilled water flow and air quantity supplied to air conditioned area is constant irrespective of the building load. The building load will generally vary from 60% to 100% for 10 hours operation per day during the year. Maintaining the continuous chilled water flow of air quantity in an air conditioning system will consume more power during part load conditions. Thus by supplying variable chilled water flow by using constant primary pumps, variable flow secondary pumps, VAVs(variable air volumes) and variable frequency drives in air handling units in the air circuit, we can decrease the energy consumption during part load conditions. In the present project attempt has been made to calculate the energy savings and payback period of existing system. This is done by introducing primary and secondary pumping with VFDs .The VFDs are in turn provided AHUs and VAVs in the duct. In many conventional air conditioned buildings, the air conditioning system generally consumes the maximum power. This can be minimized by taking proper care during the selection, design and erection of air conditioning equipment ultimately leading to substantial savings in long run. By introducing secondary pumping with VFDs, VAVs in the duct and VFDs in AHUs, the power consumption has been reduced to 12.25% over existing constant flow pumping, constant airflow systems. Payback period is 2.69 years for introducing VAVs in the duct and VFDs in the AHUs and payback period is 3.73 years for primary and secondary pumping system.
Keywords: Air conditioning systems, Energy saving techniques, VFDs, VAVs.