The Experts below are selected from a list of 2424 Experts worldwide ranked by ideXlab platform
B Cerne - One of the best experts on this subject based on the ideXlab platform.
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a large panel unglazed roof integrated liquid solar collector energy and economic evaluation
Solar Energy, 2003Co-Authors: Saso Medved, Ciril Arkar, B CerneAbstract:Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency of a large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a Tourist Facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing; it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collector’s efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters: the fin length; the absorber material and thickness; the water mass flow rate; and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9–7.9 under no-wind conditions. An economic evaluation using the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based on the current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.
Saso Medved - One of the best experts on this subject based on the ideXlab platform.
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a large panel unglazed roof integrated liquid solar collector energy and economic evaluation
Solar Energy, 2003Co-Authors: Saso Medved, Ciril Arkar, B CerneAbstract:Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency of a large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a Tourist Facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing; it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collector’s efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters: the fin length; the absorber material and thickness; the water mass flow rate; and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9–7.9 under no-wind conditions. An economic evaluation using the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based on the current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.
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A large-panel unglazed roof-integrated liquid solar collector––energy and economic evaluation
Solar Energy, 2003Co-Authors: Saso Medved, Ciril Arkar, B. ČerneAbstract:Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency of a large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a Tourist Facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing; it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collector’s efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters: the fin length; the absorber material and thickness; the water mass flow rate; and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9–7.9 under no-wind conditions. An economic evaluation using the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based on the current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.
Ciril Arkar - One of the best experts on this subject based on the ideXlab platform.
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a large panel unglazed roof integrated liquid solar collector energy and economic evaluation
Solar Energy, 2003Co-Authors: Saso Medved, Ciril Arkar, B CerneAbstract:Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency of a large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a Tourist Facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing; it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collector’s efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters: the fin length; the absorber material and thickness; the water mass flow rate; and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9–7.9 under no-wind conditions. An economic evaluation using the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based on the current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.
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A large-panel unglazed roof-integrated liquid solar collector––energy and economic evaluation
Solar Energy, 2003Co-Authors: Saso Medved, Ciril Arkar, B. ČerneAbstract:Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency of a large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a Tourist Facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing; it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collector’s efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters: the fin length; the absorber material and thickness; the water mass flow rate; and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9–7.9 under no-wind conditions. An economic evaluation using the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based on the current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.
B. Černe - One of the best experts on this subject based on the ideXlab platform.
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A large-panel unglazed roof-integrated liquid solar collector––energy and economic evaluation
Solar Energy, 2003Co-Authors: Saso Medved, Ciril Arkar, B. ČerneAbstract:Building-integrated unglazed solar collectors are cost effective solar devices that are suitable for various low temperature applications. In this article we present the design and the parametric analyses of the efficiency of a large-panel unglazed roof-integrated liquid solar collector and an economic evaluation of a large-panel solar-heating system for a swimming pool that is installed at a Tourist Facility on the Adriatic coast. The design of the solar collector is based on standard metal roofing; it takes into account the technological limitations of prefabricated panels, which makes the serial manufacturing of solar collectors possible. The parametric analyses of the large-panel solar collector’s efficiency were made using the finite-volume numerical method. The numerical model was verified with outdoor measurements, according to the ISO 9806 standard. The efficiency was analysed for the most important parameters: the fin length; the absorber material and thickness; the water mass flow rate; and the wind speed. A solar absorptance of 0.85 was considered in the analyses because this is the value that corresponds to the most frequently used roofing colour. The results show that the efficiency of the analysed panels at Tin=Ta is in the range between 0.26 and 0.74, and the heat loss factors are 2.9–7.9 under no-wind conditions. An economic evaluation using the payback period method was used to select the optimum design for the developed panels on the basis of equal solar gains and the known or estimated initial and operating costs. It was found that for the optimum panel design the payback period is between 1.5 and 2.7 years, based on the current price for non-renewable energy sources. The payback period for presented solar systems is up to four times shorter than for a glazed solar collector system.
Clara Williams - One of the best experts on this subject based on the ideXlab platform.
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Attempted circumvention of Addo National Park's expansion - blatant manipulation by officials of the land reform (redistribution) programme and wanton disregard of South African National Parks' contractual rights : South African National Parks v Addo
2012Co-Authors: Nic Olivier, Clara WilliamsAbstract:The focus of the Provision of Land and Assistance Act 126 of 1993 is on land reform. It aims to ensure the beneficial use, development and improvement of land as referred to in the Act, contribute to bring about poverty alleviation, promote economic growth, and empower historically disadvantaged persons. However, this Act has recently been manipulated in order to develop a luxury Tourist Facility. In South African National Parks v Addo Afrique Estate (Pty) Ltd (1201/2010) [2011] ZAECGHC 40, the Eastern Cape High Court had to decide on the applicability of the Act on a luxury Tourist development, as well as on the requirements for an interim interdict and the rights acquired through a right of pre-emption.