A Review to Enhance the Efficiency of Double Pass Solar Air Heater

Solar air heater is a most popular device in the space heating and industrial processes applications. But solar air heater has lower heat-transfer coefficient between the absorber plate and the air stream, which results in a lower thermal efficiency of the heater. The solar air heaters efficiency can be affected by various parameters such as collector length, number of channels, depth of channels, type of absorber plate, number and material of glass covers, air inlet temperature and air velocity. The effect of fins, Baffles and porous media on double pass solar air heater will measured by this research study. This aim is to analyze the thermal efficiency of double pass solar air heater and measured the effect of different type of media on the efficiency of it. The effects of major parameters temperature difference, air velocity, pressure difference, mass flow rate of the air has been observed for these perform study. DOI: 10.17762/ijritcc2321-8169.15025

Enhance the Performance of Heat Exchanger with Twisted Tape Insert A Review

Enhancing heat transfer surface are used in many engineering applications such as heat exchanger, air conditioning, chemical reactor and refrigeration systems, hence many techniques have been investigated on enhancement of heat transfer rate and decrease the size and cost of the involving equipment especially in heat exchangers. One of the most important techniques used are passive heat transfer technique. These techniques when adopted in Heat ex changer proved that the overall thermal performance was improved significantly. This experimental works can be taken by researchers on Augmentation Technique such as Twisted Tape. So, Researchers tried to increase the effective s urface area Contact with fl uid to increases the heat transfer rate in the heat exchanger. We tried to enhance the Heat transfer rate with the help of Tw isted Tape insert with Wiry Metallic Sponge and find out the effect of Metallic Wiry Sponge on Flow of Fl

Optimization of Drilling Parameters for GFRP with Full Factorial Method

Drilling is the most commonly applied method for hole making of fiber reinforced materials owing to the need for structure joining. GFRP is required a high quality drilling parameters due to its application in research and development, aerospace, marine, delegate furniture, roof, bridge construction, etc. This study had been given a new approach to optimize the drilling parameters such as thrust force and delamination through DOE by using full factorial design. The purpose of this study is to investigate the influence of drilling parameters, such as cutting speed, feed and Thickness of material on torque, thrust force and delamination produced when drilling different a thickness of GFRP composite sheet. It had been regression analysis and ANOVA to analyze and optimize the process parameter of drilling. From the results it has been observed that the significant effect of thickness, speed and feed on the responses thrust force, torque and circularity. It has been concluding that the minimum thickness, speed and feed given the optimum result of thrust force. The minimum speed, thickness and median feed given a optimum result for torque. The maximum speed median feed and minimum thickness given optimum result for circularity

Coping with uncertainties via resilient supply chain framework

Supply chain resilience (SCR) is a promising area budding from the emergent admiration to minimise supply chain disruptions by practitioners and by researchers across the globe. To inflate monetary earnings, many organisations execute initiatives such as comprehensive reach of supply chains, amplified outsourcing, shorter product life cycles, reduced buffers and centralisation. These initiatives are effective in stable surroundings, but they could make supply chain vulnerable to various types of disruptions. The main thrust of this research is, to propose a conceptual model for endowing deeper knowledge of how uncertainty from suppliers, customers and existing supply chain structure amplifies vulnerability and consequently increases supply chain risk exposure. In accordance with fitness landscape theory, this paper accepts a complex systems perspective to view supply chain organisations and understand their capabilities. It focuses on diminishing the vulnerability of supply chain systems and the ability to design systems to be more resilient to chang

A Review to Increase Productive Output of An Active Solar Distillation System

Solar still is one of the best solutions to solve water problem in remote arid areas. One of the methods to increase the productivity is by decrease the volumetric heat capacity of the basin. Solar distillation is one of many processes that can be used for water purification. Solar radiation can be the source of heat energy where brackish or sea water is evaporated and is then condensed as pure water. So many works can be done on the active and passive solar still. F rom this review found that if we make the still double basin and two stages the overall efficiency of the active solar still will increase

A Review to Improve the Productivity of the Hemispherical Type Solar Sill

Water is the basic need for sustaining life on the earth. With the passage of time due to technical usage and their waste disposal along with ignorance of human being caused water pollution, which led the world to water scarcity. To resolve this problem Solar Distillation is one of the best Techniques. But, due to its lower productivity it cannot be commercial in the market. So that Lots of work can be done to improve the solar still efficiency or productivity. With the help of past research work we can conclude that if we are using flat circular based absorber type hemispherical solar still than its productivity will going to be increased

A Review to Increase the Performance of Solar Still Make It Multi Layer Absorber

Water is the basic need to sustaining life on the earth for human. With the passage of time due to technical usage and their waste disposal along with ignorance of human being caused water pollution, which led the world towards water scarcity. To resolve t his problem Solar Distillation is one of the best Techniques from available another techniques. But, due to its lower productivity it cannot be commercial in the market. So that Lots of work can be done to improve the solar still efficiency or productivity. With the help of past research work we can conclude that if we are using multi layer absorber type solar still than its productivity will going to be increased and reflective radiation losses are covered by this one

Planetary Defense team project: READI (Roadmap for EArth Defense Initiatives)

Planetary Defense is a complex problem, not well understood by policy makers and the general public. The recent Chelyabinsk incident in Russia created temporary international attention but has failed to effectively stimulate public action. The lack of long-term attention to cosmic hazards has resulted in limited funding to defend our planet. Hence, it is hard to realistically address this challenge and achieve the high test and operational readiness needed for an effective Planetary Defense strategy. To address this problem, we have created a set of recommendations for the development of a Planetary Defense Program, for the purpose of contributing to the protection of Earth from asteroids and comets. The SSP15 READI Project focused on threats for which there is only a short-term warning, specifically a warning of two years or less from detection of the object to impact. We have provided recommendations in five areas of Planetary Defense including detection and tracking, deflection techniques, global collaboration, outreach and education, and evacuation and recovery. We have applied this set of recommendations in a narrative scenario to make our report more impactful and engaging. We contrast optimistic and pessimistic outcomes for a comet threat, differing from each other in terms of the level of readiness achieved during the years leading up to the discovery of the threat. In our optimistic scenario, the deflection system has achieved high test and operational readiness. The world’s governments have realized the importance of being prepared against cosmic hazards and put in place all of the necessary measures for a successful defense, leading to a positive deflection of the comet. In contrast, in the pessimistic scenario no preparation is done before the detection, and the comet strikes a heavily populated area releasing energy equivalent to 80 times the most powerful nuclear bomb ever detonated. The recommendations that we have identified in this report constitute a roadmap to avoid this horrible outcome, and we believe they should be taken seriously and swiftly implemented