Optimisation of a Swedish district heating system with reduced heat demand due to energy efficiency measures in residential buildings

Åberg, Magnus; Henning, Dag

doi:10.1016/j.enpol.2011.09.031

Cited by 66 publications

(32 citation statements)

References 10 publications

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“…The answer for district heating companies to this scenario can be to identify new applications for district heating and generate more electricity [11]. This could seem contradictory because decreased heat demand ought to result in decreased generated electricity from combined heat and power (CHP) plants, but according to [12], this is not the case because most of the energy decrease will be in heat-only boilers. Another even more important measure in order to maintain the competitiveness in district heating systems is to increase system efficiency.…”

Section: Decreased Heat Demandsmentioning

confidence: 99%

Fault detection in district heating substations

Gadd¹,

Werner

2015

Applied Energy

101

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Section: Decreased Heat Demandsmentioning

confidence: 99%

Fault detection in district heating substations

Gadd¹,

Werner

2015

Applied Energy

101

View full text Add to dashboard Cite

“…In a system perspective it can often be better to reduce the electricity consumption than the heating demand, since reducing the heating demand of a district heated building could deteriorate the conditions for electricity production [12][13][14]. However, from the building owner's perspective it can be interesting to take energy saving measures in conjunction with a renovation to reduce the energy costs.…”

Section: Introductionmentioning

confidence: 99%

Techno-economic analysis of energy renovation measures for a district heated multi-family house

Gustafsson

Zhang

et al. 2016

Applied Energy

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Techno-economic analysis of energy renovation measures for a district heated multi-family house.Applied Energy, http://dx.doi.org/10.1016/j.apenergy. 2016.05.104 Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. AbstractRenovation of existing buildings is important in the work towards increased energy efficiency and reduced environmental impact. The present paper treats energy renovation measures for a Swedish district heated multi-family house, evaluated through dynamic simulation. Insulation of roof and façade, better insulating windows and flow-reducing water taps, in combination with different HVAC systems for recovery of heat from exhaust air, were assessed in terms of life cycle cost, discounted payback period, primary energy consumption, CO₂ emissions and non-renewable energy consumption. The HVAC systems were based on the existing district heating substation and included mechanical ventilation with heat recovery and different configurations of exhaust air heat pump.Compared to a renovation without energy saving measures, the combination of new windows, insulation, flow-reducing taps and an exhaust air a heat pump gave up to 24% lower life cycle cost. Adding insulation on roof and façade, the primary energy consumption was reduced by up to 58%, CO₂ emissions up to 65% and non-renewable energy consumption up to 56%. Ventilation with heat recovery also reduced the environmental impact but was not economically profitable in the studied cases. With a margin perspective on electricity consumption, the environmental impact of installing heat pumps or air heat recovery in district heated houses is increased. Low-temperature heating improved the seasonal performance factor of the heat pump by up to 11% and reduced the environmental impact.

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“…For instance, buildings may be made energy efficient by improving insulation and ventilation or modifying the heating system. However, studies show that energy efficiency measures in buildings with DH are beneficial from a GHG emissions perspective, as they reduce peak load and level out the annual demand for DH (Åberg and Henning, 2011;Åberg et al, 2012). Thus, DH may continue to be useful.…”

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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Optimisation of a Swedish district heating system with reduced heat demand due to energy efficiency measures in residential buildings

Cited by 66 publications

References 10 publications

Fault detection in district heating substations

Fault detection in district heating substations

Techno-economic analysis of energy renovation measures for a district heated multi-family house

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

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