The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Thore Berntsson - One of the best experts on this subject based on the ideXlab platform.
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Energy Efficient upgrading of Biofuel Integrated with a Pulp Mill
2017Co-Authors: Eva Ingeborg Elisabeth Andersson, Simon Harvey, Thore BerntssonAbstract:This paper presents and evaluates different energy-efficient options for integrating drying and pelletising of biofuel with a modem energy-efficient pulp mill process. When drying biofuel, a large amount of the Heat input can often be recovered. One option for Heat recovery is to cover low temperature Heat Demand in the pulping process. Alternatively available excess Heat from the pulp mill can be used for drying. Both alternatives will contribute to a better energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be used to estimate the excess Heat potential at different temperature levels in the pulp mill. Three different technologies for pulp mill integrated biofuel drying were retained for the study, namely steam drying, flue gas drying and vacuum drying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resulting pellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for the calculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractive integrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With the available flue gas stream at the reference pulp mill, a potential pellets production of 70 000 tonnes/yr could be achieved at a cost of 24.6 €/tonne. The associated reduction in CO, emissions compared to stand-alone pellets production is 31-36 kg/MWhpellets.
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Energy efficient upgrading of biofuel integrated with a pulp mill
Energy, 2006Co-Authors: Eva Ingeborg Elisabeth Andersson, Simon Harvey, Thore BerntssonAbstract:This paper presents and evaluates different energy efficient options for integrating drying and pelletising of biofuel with a modern energy efficient pulp mill process. When drying biofuel, a large amount of the Heat input can often be recovered. One option for Heat recovery is to cover Low-Temperature Heat Demand in the pulping process. Alternatively available excess Heat from the pulp mill can be used for drying. Both alternatives will contribute to a better energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be used to estimate the excess Heat potential at different temperature levels in the pulp mill. Three different technologies for pulp mill integrated biofuel drying were chosen for the study, namely steam drying, flue gas drying and vacuum drying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resulting pellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for the calculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractive integrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With the available flue gas stream at the reference pulp mill, a potential pellets production of 70,000ton/yr could be achieved at a cost of 24.6 €/ton. The associated reduction in CO2 emissions compared to stand-alone pellets production is 31–36kg/MWhpellets.
Eva Ingeborg Elisabeth Andersson - One of the best experts on this subject based on the ideXlab platform.
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Energy Efficient upgrading of Biofuel Integrated with a Pulp Mill
2017Co-Authors: Eva Ingeborg Elisabeth Andersson, Simon Harvey, Thore BerntssonAbstract:This paper presents and evaluates different energy-efficient options for integrating drying and pelletising of biofuel with a modem energy-efficient pulp mill process. When drying biofuel, a large amount of the Heat input can often be recovered. One option for Heat recovery is to cover low temperature Heat Demand in the pulping process. Alternatively available excess Heat from the pulp mill can be used for drying. Both alternatives will contribute to a better energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be used to estimate the excess Heat potential at different temperature levels in the pulp mill. Three different technologies for pulp mill integrated biofuel drying were retained for the study, namely steam drying, flue gas drying and vacuum drying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resulting pellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for the calculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractive integrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With the available flue gas stream at the reference pulp mill, a potential pellets production of 70 000 tonnes/yr could be achieved at a cost of 24.6 €/tonne. The associated reduction in CO, emissions compared to stand-alone pellets production is 31-36 kg/MWhpellets.
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Energy efficient upgrading of biofuel integrated with a pulp mill
Energy, 2006Co-Authors: Eva Ingeborg Elisabeth Andersson, Simon Harvey, Thore BerntssonAbstract:This paper presents and evaluates different energy efficient options for integrating drying and pelletising of biofuel with a modern energy efficient pulp mill process. When drying biofuel, a large amount of the Heat input can often be recovered. One option for Heat recovery is to cover Low-Temperature Heat Demand in the pulping process. Alternatively available excess Heat from the pulp mill can be used for drying. Both alternatives will contribute to a better energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be used to estimate the excess Heat potential at different temperature levels in the pulp mill. Three different technologies for pulp mill integrated biofuel drying were chosen for the study, namely steam drying, flue gas drying and vacuum drying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resulting pellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for the calculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractive integrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With the available flue gas stream at the reference pulp mill, a potential pellets production of 70,000ton/yr could be achieved at a cost of 24.6 €/ton. The associated reduction in CO2 emissions compared to stand-alone pellets production is 31–36kg/MWhpellets.
Simon Harvey - One of the best experts on this subject based on the ideXlab platform.
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Energy Efficient upgrading of Biofuel Integrated with a Pulp Mill
2017Co-Authors: Eva Ingeborg Elisabeth Andersson, Simon Harvey, Thore BerntssonAbstract:This paper presents and evaluates different energy-efficient options for integrating drying and pelletising of biofuel with a modem energy-efficient pulp mill process. When drying biofuel, a large amount of the Heat input can often be recovered. One option for Heat recovery is to cover low temperature Heat Demand in the pulping process. Alternatively available excess Heat from the pulp mill can be used for drying. Both alternatives will contribute to a better energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be used to estimate the excess Heat potential at different temperature levels in the pulp mill. Three different technologies for pulp mill integrated biofuel drying were retained for the study, namely steam drying, flue gas drying and vacuum drying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resulting pellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for the calculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractive integrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With the available flue gas stream at the reference pulp mill, a potential pellets production of 70 000 tonnes/yr could be achieved at a cost of 24.6 €/tonne. The associated reduction in CO, emissions compared to stand-alone pellets production is 31-36 kg/MWhpellets.
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Energy efficient upgrading of biofuel integrated with a pulp mill
Energy, 2006Co-Authors: Eva Ingeborg Elisabeth Andersson, Simon Harvey, Thore BerntssonAbstract:This paper presents and evaluates different energy efficient options for integrating drying and pelletising of biofuel with a modern energy efficient pulp mill process. When drying biofuel, a large amount of the Heat input can often be recovered. One option for Heat recovery is to cover Low-Temperature Heat Demand in the pulping process. Alternatively available excess Heat from the pulp mill can be used for drying. Both alternatives will contribute to a better energy efficiency for the combined pulp mill and biofuel upgrading facility. Pinch analysis tools can be used to estimate the excess Heat potential at different temperature levels in the pulp mill. Three different technologies for pulp mill integrated biofuel drying were chosen for the study, namely steam drying, flue gas drying and vacuum drying. The different technologies are evaluated on the basis of energy usage, global CO2 emissions and resulting pellets production cost, using stand-alone pellets production as a reference. The pulp mill assumed for the calculations is the Eco-Cyclic reference pulp mill. The results of the study indicate that the most attractive integrated drying technology option is the flue gas dryer, using flue gases from the black liquor boiler. With the available flue gas stream at the reference pulp mill, a potential pellets production of 70,000ton/yr could be achieved at a cost of 24.6 €/ton. The associated reduction in CO2 emissions compared to stand-alone pellets production is 31–36kg/MWhpellets.
Deymi Dasht-bayaz - One of the best experts on this subject based on the ideXlab platform.
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Reducing Energy Consumption in Natural Gas Pressure Drop Stations by Employing Solar Heat
Proceedings of the World Renewable Energy Congress – Sweden 8–13 May 2011 Linköping Sweden, 2011Co-Authors: Mohammad Rezæi, Mahmood Farzaneh-gord, Ahmad Arabkoohsar, Deymi Dasht-bayazAbstract:In Iran (and probably in most countries) natural gas is transported through transmission pipeline at high pressures (5-7 Mpa) from production locations to consuming points. At consumption points, or when crossing into a lower pressure pipeline, the pressure of the gas must be reduced. This pressure reduction takes place in CGSs. At CGSs, the pressure is reduced from (5-7 Mpa) to (1.5-2.0 Mpa) (typically 1.7 Mpa) in highpressure intrastate pipelines. Currently, gas pressure reduction is accomplished by using throttle-valves in all of Iran‘s CGSs, where the constant-enthalpy expansion takes place and a considerable amount of energy is wasted. The gas must be Heated before it enters throttle valves to ensure that it remains above the hydrate-formation zone and dew point, so that no liquid or solid phase condenses at the station exit. The Heaters are consuming a considerable amount of natural gas flowing though the CGS as fuel to provide the required Heat for preHeating the natural gas stream. As the low temperature Heat is required for preHeating the natural gas in a CGS, this makes a CGS as perfect place to utilize solar energy and to meet low temperature Heat Demand. As the low temperature Heat is required for preHeating the natural gas in a CGS, A solar collector array is proposed to be utilized in the CGS in order to displace Heating duty of the Heater and to reduce amount of fuel consumption. The proposition includes a modified design of an in-use CGS to take advantage of freely available solar Heat. The proposed system has been applied to study the thermal behaviour of a CGS within Iran. The results show that the cost effectiveness of the proposed method with an array of 450 collector modules is resulted in fuel saving with variation between 0 to 20 USD/hr. The annual fuel saving is about 10678 USD and as the capital cost is about 76500 USD, the payback ratio is calculated to be around 9 years. The number of collector modules has been determined based on cost analysis.
H.f. De Zwart - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of roof spraying as a low cost system for sustainable energy collection
Acta Horticulturae, 2005Co-Authors: H.f. De ZwartAbstract:In case a greenhouse is Heated by means of a Heat pump, fossil fuel consumption of greenhouses can be diminished. In nowadays research and development projects around Heat pumps in horticulture, the evaporator is fed by a storage system that stores thermal energy in aquifers at depths of some 50 m. However, such a storage system must be charged. Recently, a number of charging methods are studied. At the one side of the options, projects can be mentioned that focus on regenerating the storage system while cooling the greenhouse to such an extent that it can be kept (almost) closed. In those cases the Heat collection is at least triple the amount of Heat that is needed for charging the storage facility. At the other side of the range of options, as in this paper, research is focussed on collecting only the amount of Heat required to compensate for the low temperature Heat Demand of a suitably sized Heat pump. This paper shows that a sprinkling system, as a modification on already existing systems, potentially collects more than 500 MJ per m2 per year, which gives the opportunity to save this amount of fossil fuel (about 16 m3 of natural gas per m2 per year)
