Faculty Publications

Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736

Publications by NITK Faculty

Browse

Subject: search.filters.subject.Energy saving

Search Results

Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    Effect of Solar Optical Properties of Building Envelope on Time Lag, Decrement Factor and Energy Saving of Buildings
    (Springer Nature, 2020) Mahapatra, D.; Ashok Babu, T.P.A.
    World has been suffering from energy crisis since 1970. This is because of the increased population and industrialization. Buildings have a significant contribution to total energy consumption across the globe. The increased urbanization leads to boom in construction of buildings. The materials used for the construction of buildings affect the climate of the city up to a great extent and affect the energy consumption as well. So, construction materials should be chosen wisely. The surface temperature of the building envelope is affected by the coatings used. Cool coatings help in reducing the surface temperature of the building envelope. Time lag and decrement factor are the indicators of energy saving in building. In this paper, the effect of cool coating on time lag and decrement factor was studied. Values of time lag and decrement factor were evaluated in different climatic zones of India. It has been found that as the absorptivity of the building envelope increases, the decrement factor increases. By changing the absorptivity from 0.2 to 0.73, a minimum change of 16% (New Delhi) in decrement factor and 11.75% (Jodhpur) in surface temperature was observed. The maximum change in decrement factor was 56.44% (Jodhpur). The maximum change in surface temperature was 39.02% (Bangalore). So, it should always be practised to keep the absorptivity of the building envelope as low as possible. © 2020, Springer Nature Singapore Pte Ltd.
  • No Thumbnail Available
    Item
    An approach to reduce the size and cost of PV panel in solar water pumping
    (2010) Kappali, M.; Uday Kumar, R.Y.
    Of late Solar PV generation is finding prominence as a promising renewable source of energy. Water pumping is an important application of solar PV generation. However it suffers from the demerit that the initial cost is quite high which is mainly due to the high cost of PV panels. Present paper proposes a novel approach "Individual Floor Storage Method" for solar water lifting in multi-storied buildings. In this method water is pumped to the required optimum heights thus avoiding wastage of energy. Hence the energy required will be less for a particular amount of water to be lifted. This means there will be reduction in the size of photo voltaic panel and hence in the initial cost. In the present paper, solar pumping proposal without battery backup, is worked out for a house with two floors. It's found from the tests that with the proposed new approach, PV panel size and panel cost will decrease by 13% and 11.5% respectively. ©2010 IEEE.
  • No Thumbnail Available
    Item
    Experimental, simulation and a case study on electrical energy consumption in mine drive haulage system
    (Institute of Electrical and Electronics Engineers Inc., 2015) Moger, G.D.; Murthy, C.S.N.; Yaragatti, R.Y.
    The experimental investigation study on energy consumption of fabricated 3hp mine drive haulage system is presented. The performance analysis of energy consumption based on existing mine drive haulage system of underground coal mine and experimental set-up is prepared in the laboratory for a 3-hp wound rotor induction motor. The experimental and a case study results are simulated using MATLAB /simulink model and the compared results are presented in this paper. © 2015 IEEE.
  • No Thumbnail Available
    Item
    Green routing algorithm for wireless networks
    (Springer Science and Business Media Deutschland GmbH info@springer-sbm.com, 2016) Deshmukh, A.A.; Jothish, M.; Chandrasekaran, K.
    With wireless devices gaining greater prevalence, there is a growing need for energy conservation for these devices. We propose a routing algorithm that reduces energy consumption at these mobile devices by modifying Optimized Link State Routing Protocol (OLSR). The protocol we propose is energy aware and reduces traffic to those nodes in the network that are low on battery life by using a modified Dijkstra’s algorithm. © Springer International Publishing Switzerland 2016.
  • No Thumbnail Available
    Item
    Variation of Time Lag, Decrement Factor and Inside Surface Temperature with Solar Optical Properties of Building Envelope in Different Climatic Zones of India
    (Springer, 2020) Mahapatra, D.; Ashok Babu, T.P.
    Maintenance of thermal comfort inside buildings requires a significant amount of energy. According to the Centre for Science and Environment, the energy spent on achieving thermal comfort in commercial buildings and in residential buildings are 31% and 7%, respectively. Considering the energy crisis that world has been suffering; every individual should try to save energy by some means. The increase in urbanization over the last few years gave rise to boom in constructions. Choosing the materials used for the construction of buildings wisely can contribute towards energy saving. The solar optical properties of building envelope affect the surface temperature up to a great extent which in turn affects the energy used for thermal comfort. In this paper, the effect of solar optical properties on time lag decrement factor and inside surface temperature is studied in different Indian climatic zones. © 2020, Springer Nature Singapore Pte Ltd.