Faculty of Science and Technology

Use of renewable source of energy has now become of utmost attention. With Increasing global pollution and subsequent decrement of global reserves of energy supply is a very crucial factor for environmental protection. Energy generation from renewable sources like-sun and utilization of generated one can optimize the global pollution. In this contrast this paper present one of the system utilizing the solar energy to generate hot water for daily purpose and for industrial purpose.Evacuated U-tube solar water heating system is one of the effective methods of solar thermal energy collection systems.Globally, the industries of solar evacuated tube collectors are growing at 15% annually [1]. India accounts for around 1.5% of the total installed capacity and 1% of the sales during 2008. The paper presented is focused on constructional parameters of the evacuated U-tube solar water heating system.

In today's scenario utilization of energy in an effective manner is must and that is the need of the time. After industrial revolution we are using the classical energy sources which are dependent on fossil fuels. The rate of exploration ofthese resources are much higher along with the higher rate of pollution. With the advancement in technology more efficient alternative energy sources have been recognized for environmental protection and are now available for various applications. This paper focuses one of the alternativeused for energy generation i.e. the solar option. In this study comparison of flat plate solar collector and evacuated tube solar collector is carried out and feasibility is reported.

Transpired solar walls are a renewable energy technology that is readily available, and has considerable potential for application in new as well as existing buildings.
Transpired solar wall use solar energy to preheat ventilation
(outdoor) air as it is drawn into a building. Transpired solar
wall technology is quite simple. A dark, transpired metal wall is
installed on the south-facing side of a building, creating
approximately a (20cm-30cm) gap between it and the building’s
structural wall. The dark-colored wall acts as a large solar
collector that converts solar radiation to heat. Fans mounted at
the top of the wall pull outside air through the transpired wall’s
perforations, and the thermal energy collected by the wall is
transferred to the air passing through the holes. The fans then
distribute the heated air into the building through ducts
mounted near the ceiling or to the air-heater coils for further
reheating, according to required temperature range of thermal
comfort. By preheating ventilation air with solar energy, the
technology removes a substantial load from a building’s
conventional heating system, saving energy, money, coal
consumption in electricity generation and carbon-di-oxide
emission in the environment. In the present study the
applicability of transpired solar wall system is analyzed for
climatic conditions of Sarguja district of state Chhattisgarh of
India. A transpired solar wall system of size 2m×1m with other
specified parameters and 450􀢓􀫜􀈀􀢎of volumetric air flow rate
results at an average rate of saving of 4kWh electricity and
2.5kg coal consumption per day operated for 8 hours during
daytime and increases temperature of supplied air minimum
3􀔨 􀵆 􀫝􀔨 when average solar radiation is available. In this way
transpired solar wall system may prove a better technology for
rural areas, where sufficient electricity supply is unavailable, as
it improves the thermal environment of the place under
consideration with saving in electricity and coal consumption
with reduction in environmental pollution.

Energy is one of the basic and essential requirements of livinghood. In present scenario we are dependent on conventional energy sources for producing energy to sustain our lives. Since these sources are depleting at faster rate and cost of energy is increasing simultaneously, so conversion of renewable form of energy is much desired now. Most of energy that we are using is non-renewable resources which increase the pollution and amount of CO2 in environment so it required using renewable and clean energy. And solar energy is good option for that it is in use also. The daily average solar energy incident over India varies from 4 to 7 kWh/m2 having approximately 2,300–3,200 sunny hours per year, depending upon location. Raipur is located in the sunny belt of the country and receives a good amount of solar radiation over the year. It has been observed that the daily global solar radiation over the Raipur’s region is 4.58 kwh/m2, while the daily diffuse radiation is 1.72 kWh/ m2. Solar radiation which we receive as heat and light can be converted to useful thermal energy or for production of electricity either through solar photovoltaic route or through solar thermal route. In this study devices for converting solar energy in to some other kind of useful energy e.g. for the purpose of water heating etc. is discussed and thermal analysis of efficiency is presented with its pay-back period.

Minimising the use of fossil fuels is truly key to resolving both air pollution and climatic change. This is also of prime importance because the resources of fossil fuels are limited and depleting at faster rate. Improvements in energy efficiency, use of non-polluting or less polluting sources of energy and behavioural change can lead us to safe level. Solar energy is one of best non-polluting alternative. Solar energy can be utilize as solar thermal for fluid heating and solar power for power production. This paper includes a specific area of solar thermal for water heating for commercial purpose. Also the device, which converts solar energy in to useful form of energy as heat, with the required design has been discussed.

Use of renewable source of energy has now become of utmost attention. With Increasing global pollution and subsequent decrement of global reserves of energy supply is a very crucial factor for environmental protection. Energy generation from renewable sources like- sun and utilization of generated one can optimize the global pollution. In this contrast this paper present one of the system utilizing the solar energy to generate hot water for daily purpose and for industrial purpose.Evacuated U- tube solar water heating system is one of the effective methods of solar thermal energy collection systems.Globally, the industries of solar evacuated tube collectors are growing at 15% annually [1]. India accounts for around 1.5% of the total installed capacity and 1% of the sales during 2008. The paper presented is focused on constructional parameters of the evacuated U-tube solar water heating system.

Minimising the use of fossil fuels is truly key to resolving both air pollution and climatic change. This is also of prime importance because the resources of fossil fuels are limited and depleting at faster rate. Improvements in energy efficiency, use of non-polluting or less polluting sources of energy and behavioural change can lead us to safe level. Solar energy is one of best non-polluting alternative. Solar energy can be utilize as solar thermal for fluid heating and solar power for power production. This paper includes a specific area of solar thermal for water heating for commercial purpose. Also the device, which converts solar energy in to useful form of energy as heat, with the required design has been discussed.

In this paper, two kinds of solar collectors, namely the flat plate (FP) and the transpired plate (TP) as an improved version of flat plate, made-up of blackened aluminum sheet, are analyzed and compared. The transpired plate solar collector can be operated more efficiently for air heating. To evaluate the effects of two solar collectors for air heating simplified steady state mathematical models are developed to calculate useful heat delivered, air temperature rise as well as the system efficiencies. Through comparison, it is found that transpired type is a better design in terms of heat transfer. For instance, systems that operate at 500Wí µí°¦ −í µí¿ of solar radiation intensity, 300 í µí°¦ í µí¿‘ í µí°¡í µí°« −í µí¿ of airflow rate and air temperature of 293K give 3K and 8K in air temperature rise for flat and transpired plates respectively. Useful heat delivered and efficiency of transpired plate collector is comparatively high for transpired plate collector. The transpired p...

Minimising the use of fossil fuels is truly key to resolving both air pollution and climatic change. This is also of prime importance because the resources of fossil fuels are limited and depleting at faster rate. Improvements in energy efficiency, use of non-polluting or less polluting sources of energy and behavioural change can lead us to safe level. Solar energy is one of best non-polluting alternative. Solar energy can be utilize as solar thermal for fluid heating and solar power for power production. This paper includes a specific area of solar thermal for water heating for commercial purpose. Also the device, which converts solar energy in to useful form of energy as heat, with the required design has been discussed.