The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Staffan Melin - One of the best experts on this subject based on the ideXlab platform.
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Economic sensitivity of wood biomass utilization for greenhouse heating application
Applied Energy, 2009Co-Authors: J. Chau, Taraneh Sowlati, Shahabaddine Sokhansanj, Fernando Preto, Staffan MelinAbstract:This paper presents an analysis of the impacts of technical and market changes on the economic feasibility of using wood biomass to produce heat for an average-sized greenhouse in British Columbia. A previous techno-economic analysis determined that the installation of a wood pellet or a wood residue Boiler to generate 40% of the greenhouse heat demand is more economical than using a natural Gas Boiler alone to generate all the heat [1]. As the techno-economic analysis contained forecasted parameters, a thorough sensitivity analysis is needed for sound decision making. This paper extends the previous techno-economic study by assessing the effect of fuel price, wood biomass energy contribution, and greenhouse size changes on the net present value (NPV) when using a wood pellet or wood residue Boiler with or without an electrostatic precipitator (ESP). The results indicate that the attractiveness of using wood biomass will increase if the price of fossil fuels increases more than 3% per year or carbon taxes and regulations are applied. Increasing the biomass energy contribution by 20% (to provide 60% of the total heat demand) would still be economical. The installation of a wood pellet Boiler or a wood residue Boiler is economical for average (7.5Â ha) or large (15Â ha) greenhouses.
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Techno-economic analysis of wood biomass Boilers for the greenhouse industry
Applied Energy, 2009Co-Authors: J. Chau, Taraneh Sowlati, Shahabaddine Sokhansanj, Fernando Preto, Staffan MelinAbstract:The objective of this study is to perform a techno-economic analysis on a typical wood pellet and wood residue Boiler for generation of heat to an average-sized greenhouse in British Columbia. The variables analyzed included greenhouse size and structure, Boiler efficiency, fuel types, and source of carbon dioxide (CO2) for crop fertilization. The net present value (NPV) show that installing a wood pellet or a wood residue Boiler to provide 40% of the annual heat demand is more economical than using a natural Gas Boiler to provide all the heat at a discount rate of 10%. For an assumed lifespan of 25 years, a wood pellet Boiler system could generate NPV of C$259,311 without electrostatic precipitator (ESP) and C$74,695 with ESP, respectively. While, installing a wood residue Boiler with or without an ESP could provide NPV of C$919,922 or C$1,104,538, respectively. Using a wood biomass Boiler could also eliminate over 3000Â tonne CO2 equivalents of greenhouse Gases annually. Wood biomass combustion generates more particulate matters than natural Gas combustion. However, an advanced emission control system could significantly reduce particulate matters emission from wood biomass combustion which would bring the particulate emission to a relatively similar level as for natural Gas.
F Hernandez - One of the best experts on this subject based on the ideXlab platform.
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Numerical simulation and experimental validation of an evacuated solar collector heating system with Gas Boiler backup for industrial process heating in warm climates
Renewable Energy, 2019Co-Authors: Stefano Lugo, O. García-valladares, Jorge I. Hernández, Roberto Best, F HernandezAbstract:Abstract A numerical model for a solar water heating system (SWHS) used in industrial process heat in warm climates was carried out and validated with experimental data. The experimental set up consisted in 18 evacuated tube solar collectors, 700 lt thermal storage tank, 10 kW back up auxiliary heating system (electrical), plate heat exchanger coupled to a 25 kW chiller (in order to simulate the industrial process heat), differential temperature control and recirculation pumps. In this work, a TRNSYS type was developed in order to take into account the thermal losses in connecting pipes between the storage tank and the solar collector array. A global validation of the SWHS coupled to a thermal load was carried out; the mean deviation obtained for temperatures was lower than ±3.6% and ±5.8% for the useful energy gain at the collector array. The numerical model validated was applied to the evacuated tube solar heating system installed in the Instituto de Energias Renovables; it showed that it is possible to operate an 8 kW adsorption cooling system with an annual solar fraction of 86%. The numerical results obtained showed that it could be technically feasible for Temixco, Morelos, Mexico and similar warm regions.
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numerical simulation and experimental validation of an evacuated solar collector heating system with Gas Boiler backup for industrial process heating in warm climates
Renewable Energy, 2019Co-Authors: Stefano Lugo, Roberto Best, O Garciavalladares, Jorge I Hernandez, F HernandezAbstract:A numerical model for a solar water heating system (SWHS) used in industrial process heat in warm climates was carried out and validated with experimental data. The experimental set up consisted in 18 evacuated tube solar collectors, 700 lt thermal storage tank, 10 kW back up auxiliary heating system (electrical), plate heat exchanger coupled to a 25 kW chiller (in order to simulate the industrial process heat), differential temperature control and recirculation pumps. In this work, a TRNSYS type was developed in order to take into account the thermal losses in connecting pipes between the storage tank and the solar collector array.
J. Chau - One of the best experts on this subject based on the ideXlab platform.
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Economic sensitivity of wood biomass utilization for greenhouse heating application
Applied Energy, 2009Co-Authors: J. Chau, Taraneh Sowlati, Shahabaddine Sokhansanj, Fernando Preto, Staffan MelinAbstract:This paper presents an analysis of the impacts of technical and market changes on the economic feasibility of using wood biomass to produce heat for an average-sized greenhouse in British Columbia. A previous techno-economic analysis determined that the installation of a wood pellet or a wood residue Boiler to generate 40% of the greenhouse heat demand is more economical than using a natural Gas Boiler alone to generate all the heat [1]. As the techno-economic analysis contained forecasted parameters, a thorough sensitivity analysis is needed for sound decision making. This paper extends the previous techno-economic study by assessing the effect of fuel price, wood biomass energy contribution, and greenhouse size changes on the net present value (NPV) when using a wood pellet or wood residue Boiler with or without an electrostatic precipitator (ESP). The results indicate that the attractiveness of using wood biomass will increase if the price of fossil fuels increases more than 3% per year or carbon taxes and regulations are applied. Increasing the biomass energy contribution by 20% (to provide 60% of the total heat demand) would still be economical. The installation of a wood pellet Boiler or a wood residue Boiler is economical for average (7.5Â ha) or large (15Â ha) greenhouses.
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Techno-economic analysis of wood biomass Boilers for the greenhouse industry
Applied Energy, 2009Co-Authors: J. Chau, Taraneh Sowlati, Shahabaddine Sokhansanj, Fernando Preto, Staffan MelinAbstract:The objective of this study is to perform a techno-economic analysis on a typical wood pellet and wood residue Boiler for generation of heat to an average-sized greenhouse in British Columbia. The variables analyzed included greenhouse size and structure, Boiler efficiency, fuel types, and source of carbon dioxide (CO2) for crop fertilization. The net present value (NPV) show that installing a wood pellet or a wood residue Boiler to provide 40% of the annual heat demand is more economical than using a natural Gas Boiler to provide all the heat at a discount rate of 10%. For an assumed lifespan of 25 years, a wood pellet Boiler system could generate NPV of C$259,311 without electrostatic precipitator (ESP) and C$74,695 with ESP, respectively. While, installing a wood residue Boiler with or without an ESP could provide NPV of C$919,922 or C$1,104,538, respectively. Using a wood biomass Boiler could also eliminate over 3000Â tonne CO2 equivalents of greenhouse Gases annually. Wood biomass combustion generates more particulate matters than natural Gas combustion. However, an advanced emission control system could significantly reduce particulate matters emission from wood biomass combustion which would bring the particulate emission to a relatively similar level as for natural Gas.
Stefano Lugo - One of the best experts on this subject based on the ideXlab platform.
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Numerical simulation and experimental validation of an evacuated solar collector heating system with Gas Boiler backup for industrial process heating in warm climates
Renewable Energy, 2019Co-Authors: Stefano Lugo, O. García-valladares, Jorge I. Hernández, Roberto Best, F HernandezAbstract:Abstract A numerical model for a solar water heating system (SWHS) used in industrial process heat in warm climates was carried out and validated with experimental data. The experimental set up consisted in 18 evacuated tube solar collectors, 700 lt thermal storage tank, 10 kW back up auxiliary heating system (electrical), plate heat exchanger coupled to a 25 kW chiller (in order to simulate the industrial process heat), differential temperature control and recirculation pumps. In this work, a TRNSYS type was developed in order to take into account the thermal losses in connecting pipes between the storage tank and the solar collector array. A global validation of the SWHS coupled to a thermal load was carried out; the mean deviation obtained for temperatures was lower than ±3.6% and ±5.8% for the useful energy gain at the collector array. The numerical model validated was applied to the evacuated tube solar heating system installed in the Instituto de Energias Renovables; it showed that it is possible to operate an 8 kW adsorption cooling system with an annual solar fraction of 86%. The numerical results obtained showed that it could be technically feasible for Temixco, Morelos, Mexico and similar warm regions.
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numerical simulation and experimental validation of an evacuated solar collector heating system with Gas Boiler backup for industrial process heating in warm climates
Renewable Energy, 2019Co-Authors: Stefano Lugo, Roberto Best, O Garciavalladares, Jorge I Hernandez, F HernandezAbstract:A numerical model for a solar water heating system (SWHS) used in industrial process heat in warm climates was carried out and validated with experimental data. The experimental set up consisted in 18 evacuated tube solar collectors, 700 lt thermal storage tank, 10 kW back up auxiliary heating system (electrical), plate heat exchanger coupled to a 25 kW chiller (in order to simulate the industrial process heat), differential temperature control and recirculation pumps. In this work, a TRNSYS type was developed in order to take into account the thermal losses in connecting pipes between the storage tank and the solar collector array.
Christos N Markides - One of the best experts on this subject based on the ideXlab platform.
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CO2 refrigeration system heat recovery and thermal storage modelling for space heating provision in supermarkets: An integrated approach
Applied Energy, 2020Co-Authors: Georgios Maouris, Emilio José Sarabia Escrivà, Salvador Acha, Nilay Shah, Christos N MarkidesAbstract:Abstract The large amount of recoverable heat from CO2 refrigeration systems has led UK food retailers to examine the prospect of using refrigeration integrated heating and cooling systems to provide both the space heating and cooling to food cabinets in supermarkets. This study assesses the performance of a refrigeration integrated heating and cooling system installation with thermal storage in a UK supermarket. This is achieved by developing a thermal storage model and integrating it into a pre-existing CO2 booster refrigeration model. Five scenarios involving different configurations and operation strategies are assessed to understand the techo-economic implications. The results indicate that the integrated heating and cooling system with thermal storage has the potential to reduce energy consumption by 17–18% and GHG emissions by 12–13% compared to conventional systems using a Gas Boiler for space heating. These reductions are achieved despite a marginal increase of 2–3% in annual operating costs. The maximum amount of heat that can be stored and utilised is constrained by the refrigeration system compressor capacity. These findings suggest that refrigeration integrated heating and cooling systems with thermal storage are a viable heating and cooling strategy that can significantly reduce the environmental footprint of supermarket space heating provision and under the adequate circumstances can forsake the use of conventional fossil-fuel (natural Gas) Boiler systems in food-retail buildings.
