Cryogenic CO2 condensation and membrane separation of syngas for large-scale LH2 production.

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Status on surplus heat database

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Designing novel concepts for surplus heat recovery

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Evaluation of Heat Recovery Heat Exchanger Design Parameters for Heat-to-Power Conversion from Metallurgical Off-Gas

Heat recovery heat exchangers for heat-to-power conversion from metallurgical off-gas should have a compact design that reduces component cost and footprint. The goal of our study is to investigate and identify key heat exchanger design parameters for minimizing the surface area of heat recovery heat exchangers. We explore the effect of basic heat exchanger design parameters on component and system performance through a combined Rankine cycle and heat exchanger optimization. We consider both "ideal" and "real" heat exchangers. The ideal heat exchangers are characterized by a minimum number of practical design constraints and provide a reference for the lowest achievable heat transfer surface area. The "real" heat exchangers are not based on detailed heat exchanger designs per se, but represent different practical design constraints inspired by well-known heat exchanger concepts. This approach enables evaluation of different heat exchanger types on a system level without detailed modelling of the heat exchangers. Results show that the different heat exchanger types result in significantly different surface areas under the investigated conditions. As expected, concepts that allow large differences between hot and cold side cross-sectional flow areas and hydraulic diameters can be better optimized to off-gas heat-to-power conversion. Thus, heat exchangers with these flexibilities, such as plate-and-fin type concepts, appear to be promising for off-gas heat-to-power conversion.acceptedVersio

Enabling Power Production from Challenging Industrial Off-Gas – Model-Based Investigation of a Novel Heat Recovery Concept

Off-gas from the metal industry is a significant surplus heat source that is often not utilized due to lack of internal and external heat demands. Power production from the surplus heat in the off-gas could be a promising option for utilization. This work considers an off-gas at 150 °C from a metallurgical process, suitable for a Rankine Cycle (RC). Metallurgical off-gas typically contains particles that can deposit on heat exchanger surfaces, therefore requiring specialized heat recovery solutions for robustness and consistent performance. To maximize competitiveness of an RC implementation, it is crucial to recover the surplus heat at the highest possible temperature. We explore a novel plate-type heat exchanger concept for improved heat recovery from scaling-prone off-gas. Simulations show that the investigated concept can be competitive both in terms of weight and compactness compared to both a clean gas reference exchanger and alternative dirty gas conceptacceptedVersio

Evaluation of Heat Recovery Heat Exchanger Design Parameters for Heat-to-Power Conversion from Metallurgical Off-Gas

Heat recovery heat exchangers for heat-to-power conversion from metallurgical off-gas should have a compact design that reduces component cost and footprint. The goal of our study is to investigate and identify key heat exchanger design parameters for minimizing the surface area of heat recovery heat exchangers. We explore the effect of basic heat exchanger design parameters on component and system performance through a combined Rankine cycle and heat exchanger optimization. We consider both "ideal" and "real" heat exchangers. The ideal heat exchangers are characterized by a minimum number of practical design constraints and provide a reference for the lowest achievable heat transfer surface area. The "real" heat exchangers are not based on detailed heat exchanger designs per se, but represent different practical design constraints inspired by well-known heat exchanger concepts. This approach enables evaluation of different heat exchanger types on a system level without detailed modelling of the heat exchangers. Results show that the different heat exchanger types result in significantly different surface areas under the investigated conditions. As expected, concepts that allow large differences between hot and cold side cross-sectional flow areas and hydraulic diameters can be better optimized to off-gas heat-to-power conversion. Thus, heat exchangers with these flexibilities, such as plate-and-fin type concepts, appear to be promising for off-gas heat-to-power conversion

Enabling Power Production from Challenging Industrial Off-Gas – Model-Based Investigation of a Novel Heat Recovery Concept

Off-gas from the metal industry is a significant surplus heat source that is often not utilized due to lack of internal and external heat demands. Power production from the surplus heat in the off-gas could be a promising option for utilization. This work considers an off-gas at 150 °C from a metallurgical process, suitable for a Rankine Cycle (RC). Metallurgical off-gas typically contains particles that can deposit on heat exchanger surfaces, therefore requiring specialized heat recovery solutions for robustness and consistent performance. To maximize competitiveness of an RC implementation, it is crucial to recover the surplus heat at the highest possible temperature. We explore a novel plate-type heat exchanger concept for improved heat recovery from scaling-prone off-gas. Simulations show that the investigated concept can be competitive both in terms of weight and compactness compared to both a clean gas reference exchanger and alternative dirty gas concep