The energy consumption growth in the modern life styles have affected the nature of living to a greater extend. The over utilization of the resources and the modern life styles of the people is the main cause leading to the depletion of the resources. The energy depletion from the resources are aggravating day by day. So it is important that measures are to be taken so as to reduce this imposing issue. From the past studies, it is well admitted that the preparation of the energy conservation even from the initial stage itself can lead to the reduction in energy consumption. So it is important that measures are to be taken so as to reduce these imposing issues. This paper gives a brief idea regarding the requirements of the basic development of energy saving buildings and energy saving transportation. This technical paper will give a brief idea of the various innovative technologies that are developing in the field of the green construction which can be able to introduce energy efficiency in buildings. A study is also made in this paper comparing the efficiency of developing green technologies and conventional technologies on the basis of cost efficiency. The paper also envisages a brief idea regarding the importance of various factors in the development of sustainable pavements, viz, design, materials, constructions, operations, etc.
AN EXPERIMENTAL INVESTIGATION ON ENERGY EFFICIENT LIGHT TRANSMITTING CONCRETE
P.M. Shanmugavadivu, L. Krishnan, K. Umashankar, K. Arun Prakash, M. Shobana
Light transmitting concrete is one of the fibre reinforced concrete which is used for aesthetic application by incorporating the optical fibres in concrete. Optical fibres are one which helps for transmission of light through fibre. The end-lite type of fibre is used to increase the aesthetic appearance of the concrete. The concept of light transmitting concrete is like a transparent concrete. When it is used in ceiling or side wall, it is exposed to direct sun light which transmit the image but not completely transparent. The investigation is not constrained only with the decorative purpose but the effect of fibre application in the strength aspect is also discussed. When the fibres are arranged in different layers that increases the load carrying capacity and also the patter can be created to make the concrete decorative. This type of concrete can be installed at a very low cost and increasing the visual appeal. The application can be used in decorating the interior of a hall or lobby and the ceiling to glow in dark by external lighting source and during day time the concrete glows by the light transmission from natural resource.
EVALUATION OF AERODYNAMIC PRESSURE AND FORCE COEFFICIENTS FOR A 1:2:5RECTANGULAR BUILDING MODEL UNDER UNIFORM FLOW CONDITION IN WIND TUNNEL
Shilpa Girish, P. Harikrishna, A.S. Santhi, G. Ramesh Babu
A large number of tall buildings are being constructed in the urban environment due to the sustained demand for office and residential space. Wind loads on these tall buildings are one of the governing design loads. In the present study, pressure measurements on a rectangular building model (1:2:5) with dimensions of 10 cm x 20 cm in plan and with a height of 50 cm have been conducted under uniform flow condition in a wind tunnel. The model has been instrumented with pressure taps along the circumference of the model at 5 different levels along the height of the model. Pressure measurements have been made for different angles of wind incidence. The evaluated mean aerodynamic force coefficients are compared with the values given in the IS code for wind directions normal to faces with smaller and larger width of the building. Further, the paper highlights the variation of mean and standard deviation pressure/force coefficients with angle of wind incidence for different levels.
DESIGN AND TECHNO- ECONOMIC ANALYSIS OF A SOLAR MATRIX COLLECTOR FOR DRYING APPLICATION
In the current world energy scenario, use of renewable energy is found to be exponentially increasing every year. India, being in the tropical region, has very good solar energy resource with nearly 300 sunny days on average. Many Solar PV and Thermal installations have been done to utilize the same. Hot air generation through solar air heaters is considered as one of the prominent applications of utilizing solar energy. Few developments have been taken place to utilize solar air heaters for applications like drying, process heating etc. This paper explains the development of a solar air heater with wire mesh as absorber, with nominal porosity for flow of air through it. The main advantage of this type of design is the hot air will not have contact with the glazing and hence top loss coefficient is minimized. The performance of the air heater is studied using a dryer as the end application. Thermal analysis of the air heater was done to determine its efficiency. Products, used in dryer, are different types of vegetable, say bitter guard and hence the study was done to compare the open sun dried and the solar dried samples. Economic analysis for the drying application was also investigated.