System analysis in a European perspective of new industrial cooling supply in a CHP system

Svensson, Inger-Lise; Moshfegh, Bahram

doi:10.1016/j.apenergy.2011.07.026

Cited by 14 publications

(10 citation statements)

References 12 publications

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“…Research shows that DH may contribute to reducing energy use in industries, by replacing other energy use in production processes (Difs et al, 2009;Henning and Trygg, 2008). Using DH for cooling purposes may also have large potential, through absorption cooling (Difs et al, 2009;Svensson and Moshfegh, 2011). This diversity of applications ensures that DH may be useful not only in countries with a cold climate but also in regions where space heating is not extensively required.…”

Section: Using District Heatingmentioning

confidence: 99%

Assessing the climate impact of district heating systems with combined heat and power production and industrial excess heat

Olsson

Wetterlund

Söderström

2015

Resources, Conservation and Recycling

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Heat demand is a large contributor to greenhouse gas (GHG) emissions in the European Union (EU), as heat is largely produced using fossil fuel resources. Extended use of district heating (DH) could reduce climate impact, as DH systems can distribute heat produced in efficient combined heat and power (CHP) plants and industrial excess heat, thus utilising heat that would otherwise be wasted. The difficulty to estimate and compare GHG emissions from DH systems can however constitute an obstacle to an expanded implementation of DH. There are several methods for GHG emission assessments that may be used with varying assumptions and system boundaries. The aim of this paper is to illuminate how methodological choices affect the results of studies estimating GHG emissions from DH systems, and to suggest how awareness of this can be used to identify possibilities for GHG emission reductions. DH systems with CHP production and industrial excess heat are analysed and discussed in a systems approach. We apply different methods for allocating GHG emissions between products and combine them with different system boundaries. In addition, we discuss the impact of resource efficiency on GHG emissions, using the framework of industrial symbiosis (IS). We conclude that assessments of the climate impact of DH systems should take local conditions and requirements into account. In order for heat from CHP production and industrial excess heat to be comparable, heat should be considered a by-product regardless of its origin. That could also reveal opportunities for GHG emission reductions.

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Section: Using District Heatingmentioning

confidence: 99%

Assessing the climate impact of district heating systems with combined heat and power production and industrial excess heat

Olsson

Wetterlund

Söderström

2015

Resources, Conservation and Recycling

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“…pulp and paper, forest, automobile manufacturing and chemical) to study both economic and environmental aspects (e.g. CO2 emission impact) [25][26][27][28]. A more through description of the method can be found in [21].…”

Section: Energy Systems Modeling Toolmentioning

confidence: 99%

“…Only a small proportion of electricity is needed for pumping (2% of the produced cooling). [39] Absorption chillers are suitable for water-distributed cooling, and they have a coefficient of performance (COP) of about 0.7 [40] (compared to compression chillers which normally have a COP of 2 [26]). …”

Section: Technologies For Excess Heat Usementioning

confidence: 99%

Industrial excess heat use: Systems analysis and CO2 emissions reduction

Viklund¹,

Karlsson²

2015

Applied Energy

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The adopted energy efficiency directive stresses the use of excess heat as a way to reach the EU target of primary energy use. Use of industrial excess heat may result in decreased energy demand, CO2 emissions reduction, and economic gains. In this study, an energy systems analysis is performed with the aim of investigating how excess heat should be used, and the impact on CO2 emissions. The manner in which the heat is recovered will affect the system. The influence of excess heat recovery and the trade-off between heat recovery for heating or cooling applications and electricity production has been investigated using the energy systems modeling tool reMIND. The model has been optimized by minimizing the system cost. The results show that it is favorable to recover the available excess heat in all the investigated energy market scenarios, and that heat driven electricity production is not a part of the optimal solution. The trade-off between use of recovered excess heat in the heating or cooling system depends on the energy market prices and the type of heat production. The introduction of excess heat reduces the CO2 emissions in the system for all the studied energy market scenarios.

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“…normally the industrial cooling demand is covered with electricity driven chillers [4]. authors of [5] have studied the adsorption systems in different applications.…”

Section: Previous Research On Heat Based Coolingmentioning

confidence: 99%

Industrial CHP excess heat efficient usage for cooling

Uuemaa¹,

Vīgants²,

Blumberga³

et al. 2014

Energetika

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This study investigates the possibilities how to utilize the combined heat and power plant (CHP) excess heat in the industry during the hot periods of time when the heat demand is limited. in order to maximize the CHP electricity production the efficient heat load has to be increased. The goal of this article is to present the solution for the industrial CHP excess heat utilization for the local cooling. The study introduces the method and model of how to evaluate the industrial CHP plant potential and economical benefit for the production of local cooling from the excess heat.Key words: combined cooling, heat and power plant, energy efficiency, HVaC systems, industrial processes INTRODUCTIONCHP plants are widely used in the areas where there is a heat demand. They can be categorized into two categories depending on the nature of the heat consumer. Firstly, the district heating (DH) CHP plants which use the DH network to transfer the heat to the residential area which is either a city or a local settlement. Secondly, the industrial CHP, which produces the heat to the on-site industry or for the group of industries nearby. Depending on the industry production profile, the heat consumption is usually lower in the summertime whereas the cool ing demand is 137 Industrial CHP excess heat efficient usage for cooling the biggest. Therefore this makes the production of local cooling from the excess heat an efficient solution to improve the economical performance of the entire facility.The maximum heat production is limited in the summertime due to the decreased heat demand. Since the industrial CHP plants are mainly working with back pressure turbines, in order to maxi mize the thermodynamical efficiency, the electricity production will decrease accordingly during the periods of lower heat demand. Therefore, finding solutions to increase the heat load is a key factor for maximizing the CHP electricity production and hence the economical performance of the plant.technically a CHP plant can also operate in condensing mode during the summer period if the plant has sufficient auxiliary cooling devices. However, the relatively low electrical efficiency and low electricity market price do not cover the variable cost of the fuel. Utilizing the excess heat for producing local cooling enables the CHP to increase its electrical output. in an ideal case it could run as a base load plant which produces electricity on full load all year round maximizing the operational profit. Primarily, the additional income comes from increased electricity production. Some income would also come from savings on cooling costs that otherwise would be done with solely electricity driven chillers.Contribution of this study is to investigate the local absorption chiller profitability in wood industry under open electricity market conditions. in the 2nd section the previous research is introduced, in the 3rd section the CCHP operation in the open electricity market conditions is introduced, 4th section outlines the possibilities in the wood industry and...

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System analysis in a European perspective of new industrial cooling supply in a CHP system

Cited by 14 publications

References 12 publications

Assessing the climate impact of district heating systems with combined heat and power production and industrial excess heat

Assessing the climate impact of district heating systems with combined heat and power production and industrial excess heat

Industrial excess heat use: Systems analysis and CO2 emissions reduction

Industrial CHP excess heat efficient usage for cooling

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