From heat integration targets toward implementation – A TSA (total site analysis)-based design approach for heat recovery systems in industrial clusters

Hackl, Roman; Harvey, Simon

doi:10.1016/j.energy.2015.05.135

Cited by 34 publications

(14 citation statements)

References 18 publications

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“…A recent study of the chemical complex investigated economic performance of all possible combinations of increased IEH recovery and export to a DH network . Based on the findings of that study and a previous evaluation of possible cost‐effective systems for internal heat recovery, it was estimated that 40 MW of the 180 MW of heat could be recovered in a cost‐effective manner within the site, i.e., this amount of IEH is avoidable. In the base case, it was therefore assumed that 140 MW of unavoidable IEH was available for delivery to the DH pipeline.…”

Section: Methodology Input Data and Assumptionsmentioning

confidence: 99%

Holistic methodological framework for assessing the benefits of delivering industrial excess heat to a district heating network

et al. 2020

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Summary In Sweden, over 50% of building heating requirements are covered by district heating. Approximately 8% of the heat supply to district heating systems comes from excess heat from industrial processes. Many studies indicate that there is a potential to substantially increase this share, and policies promoting energy efficiency and greenhouse gas emissions reduction provide incentives to do this. Quantifying the medium and long‐term economic and carbon footprint benefits of such investments is difficult because the background energy system against which new investments should be assessed is also expected to undergo significant change as a result of the aforementioned policies. Furthermore, in many cases, the district heating system has already invested or is planning to invest in non‐fossil heat sources such as biomass‐fueled boilers or CHP units. This paper proposes a holistic methodological framework based on energy market scenarios for assessing the long‐term carbon footprint and economic benefits of recovering excess heat from industrial processes for use in district heating systems. In many studies of industrial excess heat, it is assumed that all emissions from the process plant are allocated to the main products, and none to the excess heat. The proposed methodology makes a distinction between unavoidable excess heat and excess heat that could be avoided by increased heat recovery at the plant site, in which case it is assumed that a fraction of the plant emissions should be allocated to the exported heat. The methodology is illustrated through a case study of a chemical complex located approximately 50 km from the city of Gothenburg on the West coast of Sweden, from which substantial amounts of excess heat could be recovered and delivered to heat to the city's district heating network which aims to be completely fossil‐free by 2030.

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Section: Methodology Input Data and Assumptionsmentioning

confidence: 99%

Holistic methodological framework for assessing the benefits of delivering industrial excess heat to a district heating network

et al. 2020

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“…The strategy suggested by Hackl and colleagues () involves hot water systems collecting and distributing excess process heat and redistribution of excess steam and fuel throughout the industry cluster. Hackl and Harvey () identified several levels of integration, each differing in terms of fuel consumption reduction potential, the number of companies involved, and investment costs. For this article, we chose a level that we perceived as ambitious yet realistic: recovery of 50.8 megawatts (MW) of process heat, resulting in a corresponding decrease in natural gas consumption of approximately 56.5 MW by implementing heat recovery measures and including the companies Borealis, Perstorp, and INOVYN.…”

Section: Methodsmentioning

confidence: 99%

Environmental Evaluation of Industry Cluster Strategies with a Life Cycle Perspective: Replacing Fossil Feedstock with Forest‐Based Feedstock and Increasing Thermal Energy Integration

Røyne

Hackl

Ringström

et al. 2017

J of Industrial Ecology

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Symbiotic linkages in industry clusters in the form of interconnected materials, energy and information flows, and close proximity provide unique opportunities to develop efficient environmental strategies. The purpose of our study is to examine the practical potential of applying a life cycle approach in strategy evaluations, as the environmental impact caused by industrial symbiosis systems outside the company gates has been scarcely addressed. This is done by evaluating two strategies for an industry cluster in Sweden: (1) to replace a share of the fossil feedstock used in the industry cluster with forest-based feedstock and (2) to improve energy efficiency through thermal energy integration. The environmental impact reduction potential of the strategies is evaluated using life cycle assessment. The ratio between investment cost and reduced global warming potential is used as an indicator to evaluate the cost-effectiveness of the strategies. Results demonstrate the importance of applying a life cycle perspective as the assessment outcome depends heavily on whether only on-site consequences are assessed or if upstream and downstream processes are also included. 20% of the greenhouse gas emission reduction of the energy integration strategy occurs off-site, whereas the forest strategy has the largest reduction potential off-site, >80%.Volume 22, Number 4 enhance their resource and energy efficiency through symbiotic exchanges of materials and energy. Eckelman and Chertow (2013) reviewed ten studies from four continents where interlinked company formations were compared with stand-alone companies. All the studies concluded that co-location was environmentally beneficial. Examples of advantages were cascades

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“…While TSA helps to identify the targets of energy requirements of multiple processes/plants, it brings about challenges in implementation due to the variety of plants/companies involved in the exchange. A method to overcome such challenges was developed by Hackl and Harvey [18]. In the first step of their method, TSA was used to find the total site targets, while in the second step the number of plants/companies involved in inter-plant heat integration was minimised and the investment required for the integration was split into periods.…”

Section: State Of the Artmentioning

confidence: 99%

Incorporating Location Aspects in Process Integration Methodology

2019

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The large potential for waste resource and heat recovery in industry has been motivating research toward increasing efficiency. Process integration methods have proven to be effective tools in improving industrial sites while decreasing their resource and energy consumption; however, location aspects and their impact are generally overlooked. This paper presents a method based on process integration, which considers the location of plants. The impact of the locations is included within the mixed integer linear programming framework in the form of heat losses, temperature and pressure drop, and piping cost. The objective function is selected as minimisation of the total cost of the system excluding piping cost and -constraints are applied on the piping cost to systematically generate multiple solutions. The method is applied to a case study with industrial plants from different sectors. First, the interaction between two plants and their utility integration are illustrated, depending on the piping cost limit which results in the heat pump and boiler on one site being gradually replaced by excess heat recovered from the other plant. Then, the optimisation of the whole system is carried out, as a large-scale application. At low piping cost allowances, heat is shared through high pressure steam in above-ground pipes, while at higher piping cost limits the system switches toward lower pressure steam sharing in underground pipes. Compared to the business-as-usual operation of the sites, the optimal solution obtained with the proposed method leads to 20% reduction in the overall cost of the system, including the piping cost. Further reduction in the cost is possible using a state of the art method but the technical and economic feasibility is not guaranteed. Thus, the present work provides a tool to find optimal industrial symbiosis solutions under different investment limits on the infrastructure between plants.

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From heat integration targets toward implementation – A TSA (total site analysis)-based design approach for heat recovery systems in industrial clusters

Cited by 34 publications

References 18 publications

Holistic methodological framework for assessing the benefits of delivering industrial excess heat to a district heating network

Holistic methodological framework for assessing the benefits of delivering industrial excess heat to a district heating network

Environmental Evaluation of Industry Cluster Strategies with a Life Cycle Perspective: Replacing Fossil Feedstock with Forest‐Based Feedstock and Increasing Thermal Energy Integration

Incorporating Location Aspects in Process Integration Methodology

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