The Experts below are selected from a list of 45 Experts worldwide ranked by ideXlab platform
H.p. Garg - One of the best experts on this subject based on the ideXlab platform.
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Effect of baffle plate on the performance of a triangular built-in-storage solar water heater
Energy Conversion and Management, 1995Co-Authors: S C Kaushik, Rajesh Kumar, H.p. GargAbstract:The triangular design of a solar water heater not only enhances the overall gain to the system but also improves the natural convection between the absorbing plate and the water, leading to better performance of the system. A Night Insulation cover is used at the top surface of the heater to reduce the losses from the system during the off-sunshine hours. Another way to reduce the losses from the system is by using an insulating baffle plate in the tank. This plate divides the tank water into two portions, the water above this plate is known as the upper column and below is known as the lower column. The water of the two columns is in contact with each other with the help of the incoming and outgoing vents provided in the baffle plate. This plate also suppresses losses from the lower column during the off-sunshine hours. In this paper, we have studied the effect of a baffle plate on the performance of a triangular built-in-storage solar water heater. To obtain the thermal behavior of the system, the energy balance equations are written at the different nodes, and the well-known finite difference forward time step marching technique is used for their solution. The proposed system is studied by varying the vent area, the water mass in the two columns and under a constant flow rate for different durations. The effects of the thermal conductivity and thickness of the baffle plate on the water temperature are also investigated. It is found that the presence of the baffle plate greatly improves the system performance during off-sunshine hours.
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Transient analysis of a triangular built-in-storage solar water heater under winter conditions
Heat Recovery Systems and CHP, 1994Co-Authors: S C Kaushik, H.p. Garg, Rakesh Kumar, J PrakashAbstract:Abstract In this paper, the performance of a triangular built-in-storage solar water heater under winter conditions has been studied. The triangular cross-section of the system results in higher solar gain and enhances the natural convection leading to a higher water temperature. The forward finite difference technique is employed and initial conditions are derived from the assumption that the water temperature and the temperature at each node are in equilibrium with the ambient temperature. The performance of the system is analyzed under no flow, constant flow rate and intermittent flow rate conditions. The effect of the Night Insulation cover is also analyzed. A comparative study of the triangular water heater with a rectangular one is also made. The effect of the tilt angle on the water heater is also discussed. The efficiency of the system under various conditions is also discussed.
S C Kaushik - One of the best experts on this subject based on the ideXlab platform.
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Effect of baffle plate on the performance of a triangular built-in-storage solar water heater
Energy Conversion and Management, 1995Co-Authors: S C Kaushik, Rajesh Kumar, H.p. GargAbstract:The triangular design of a solar water heater not only enhances the overall gain to the system but also improves the natural convection between the absorbing plate and the water, leading to better performance of the system. A Night Insulation cover is used at the top surface of the heater to reduce the losses from the system during the off-sunshine hours. Another way to reduce the losses from the system is by using an insulating baffle plate in the tank. This plate divides the tank water into two portions, the water above this plate is known as the upper column and below is known as the lower column. The water of the two columns is in contact with each other with the help of the incoming and outgoing vents provided in the baffle plate. This plate also suppresses losses from the lower column during the off-sunshine hours. In this paper, we have studied the effect of a baffle plate on the performance of a triangular built-in-storage solar water heater. To obtain the thermal behavior of the system, the energy balance equations are written at the different nodes, and the well-known finite difference forward time step marching technique is used for their solution. The proposed system is studied by varying the vent area, the water mass in the two columns and under a constant flow rate for different durations. The effects of the thermal conductivity and thickness of the baffle plate on the water temperature are also investigated. It is found that the presence of the baffle plate greatly improves the system performance during off-sunshine hours.
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Transient analysis of a triangular built-in-storage solar water heater under winter conditions
Heat Recovery Systems and CHP, 1994Co-Authors: S C Kaushik, H.p. Garg, Rakesh Kumar, J PrakashAbstract:Abstract In this paper, the performance of a triangular built-in-storage solar water heater under winter conditions has been studied. The triangular cross-section of the system results in higher solar gain and enhances the natural convection leading to a higher water temperature. The forward finite difference technique is employed and initial conditions are derived from the assumption that the water temperature and the temperature at each node are in equilibrium with the ambient temperature. The performance of the system is analyzed under no flow, constant flow rate and intermittent flow rate conditions. The effect of the Night Insulation cover is also analyzed. A comparative study of the triangular water heater with a rectangular one is also made. The effect of the tilt angle on the water heater is also discussed. The efficiency of the system under various conditions is also discussed.
Rajesh Kumar - One of the best experts on this subject based on the ideXlab platform.
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Effect of baffle plate on the performance of a triangular built-in-storage solar water heater
Energy Conversion and Management, 1995Co-Authors: S C Kaushik, Rajesh Kumar, H.p. GargAbstract:The triangular design of a solar water heater not only enhances the overall gain to the system but also improves the natural convection between the absorbing plate and the water, leading to better performance of the system. A Night Insulation cover is used at the top surface of the heater to reduce the losses from the system during the off-sunshine hours. Another way to reduce the losses from the system is by using an insulating baffle plate in the tank. This plate divides the tank water into two portions, the water above this plate is known as the upper column and below is known as the lower column. The water of the two columns is in contact with each other with the help of the incoming and outgoing vents provided in the baffle plate. This plate also suppresses losses from the lower column during the off-sunshine hours. In this paper, we have studied the effect of a baffle plate on the performance of a triangular built-in-storage solar water heater. To obtain the thermal behavior of the system, the energy balance equations are written at the different nodes, and the well-known finite difference forward time step marching technique is used for their solution. The proposed system is studied by varying the vent area, the water mass in the two columns and under a constant flow rate for different durations. The effects of the thermal conductivity and thickness of the baffle plate on the water temperature are also investigated. It is found that the presence of the baffle plate greatly improves the system performance during off-sunshine hours.
Mehlika Inanici - One of the best experts on this subject based on the ideXlab platform.
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Analysis of the thermal performance of a building design located at 2465 m: Antalya-Saklikent National Observatory guesthouse
Building and Environment, 2003Co-Authors: F. Nur Demirbilek, Ugur G Yalçiner, Ahmet Ecevit, Erkan Sahmali, Mehlika InaniciAbstract:Abstract This study is based on thermal performance analysis and evaluation of the National Observatory guesthouse with the software SUNCODE-PC. The study is unique owing to its high-altitude site ( 2465 m ) in a remote area, harsh climate (with almost no data available), and functional restrictions of astronomical facilities. The design is thermally evaluated through different modes of application of Insulation, materials, types of glazing, window/wall ratios, Trombe walls, winter Night Insulation, summer ventilation and shading.
Frederik Vildbrad Winther - One of the best experts on this subject based on the ideXlab platform.
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Development of a simplified and dynamic method for double glazing façade with Night Insulation and validated by full-scale façade element
Energy and Buildings, 2013Co-Authors: Mingzhe Liu, Kim Bjarne Wittchen, Per Heiselberg, Frederik Vildbrad WintherAbstract:Abstract The study aims to develop a simplified calculation method to simulate the performance of double glazing facade with Night Insulation. This paper describes the method to calculate the thermal properties (U-value) and comfort performance (internal surface temperature of glazing) of the double glazing facade with the Night Insulation. The calculation result of the internal glazing surface temperature has been validated with experimental data collected in a full-scale facade element test facility at Aalborg University (DK). With the help of the simplified method, dynamic U-value of the facade with Night Insulation is calculated and compared with that of the facade without the Night Insulation. Based on standards EN 410 and EN 673, the method takes the thermal mass of glazing and the infiltration between the Insulation layer and glazing into account. Furthermore it is capable of implementing whole year calculation at different time steps. Acceptable accuracy and simplicity inputs are also the advantages of the method, which make it a suitable tool to evaluate the performance of Night Insulation during the design stage of buildings. The result calculated by the method proves that the facade with the Night Insulation performs much better than that without the Night Insulation.