Large-scale heat pumps: Uptake and performance modelling of market-available devices

Jesper, Mateo; Schlosser, Florian; Pag, Felix; Walmsley, Timothy Gordon; Schmitt, Bastian; Vajen, Klaus

doi:10.1016/j.rser.2020.110646

Cited by 51 publications

(28 citation statements)

References 12 publications

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“…Schmitt [2] found that, in a temperate climate, economic feasibility of solar process heat plants is often limited to heat sink temperatures of up to 100 °C. At the same time, the majority of commercially available large-scale heat pumps is limited to heat sink temperatures of 100 °C [3]. Figure 6 illustrates temperature levels of common production processes in the temperature range up to 240 °C.…”

Section: Processes and Temperature Levelsmentioning

confidence: 99%

“…Besides economic feasibility, technical feasibility is another important parameter limiting the application of renewable heating systems. For example, commercially available large-scale heat pumps are limited to heat sink temperatures of up to 160 °C [3]. Heat sink temperatures of around 150 °C are also limiting the application of most non-concentrating solar thermal collectors [2].…”

Section: Processes and Temperature Levelsmentioning

confidence: 99%

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Reference applications for renewable heat

Pag¹,

Jesper²,

Jordan³

et al. 2021

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There is a high degree of freedom and flexibility in the way to integrate renewable process heat in industrial processes. Nearly in every industrial or commercial application various heat sinks can be found, which are suitable to be supplied by renewable heat, e.g. from solar thermal, heat pumps, biomass or others. But in contrast to conventional fossil fuel powered heating systems, most renewable heating technologies are more sensitive to the requirements defined by the specific demand of the industrial company. Fossil fuel-based systems benefit from their indifference to process temperatures in terms of energy efficiency, their flexibility with respect to part-load as well as on-off operation, and the fuel as a (unlimited) chemical storage. In contrast, the required temperature and the temporal course of the heat demand over the year determine whether a certain regenerative heat generator is technically feasible at all or at least significantly influence parameters like efficiency or coverage rate.

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Section: Processes and Temperature Levelsmentioning

confidence: 99%

Section: Processes and Temperature Levelsmentioning

confidence: 99%

Reference applications for renewable heat

Pag¹,

Jesper²,

Jordan³

et al. 2021

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“…Researchers have made numerous attempts to determine a correlation between each project's unique properties (heat sink and source temperatures, demand values) and HP's performance to reach an acceptable range of matching results between simulation and real-world experimental data (HPTCJ, 2010;Arpagaus et al, 2018;Jesper et al, 2021). The availability of various technologies and different technical specifications and details for HPs does not allow for a single parameter set to model all HPs.…”

Section: Hp Systemmentioning

confidence: 99%

Novel Energy System Design Workflow for Zero-Carbon Energy District Development

Samadzadegan¹,

Abolhassani²,

Dabirian³

et al. 2021

Front. Sustain. Cities

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The growing urban population globally leads to higher greenhouse gas (GHG) emissions and stress on the electricity networks for meeting the increasing demand. In the early urban design stages, the optimization of the urban morphology and building physics characteristics can reduce energy demand. Local generation using renewable energy resources is also a viable option to reduce emissions and improve grid reliability. Notwithstanding, energy simulation and environmental impact assessment of urban building design strategies are usually not done until the execution planning stage. To address this research gap, a novel framework for designing energy systems for zero-carbon districts is developed. An urban building energy model is integrated with an urban energy system model in this framework. Dynamic prediction of heating and cooling demand and automatic sizing of different energy system configurations based on the calculated demands are the framework's primary capabilities. The workability of the framework has been tested on a case study for an urban area in Montreal to design and compare two different renewable energy systems comprising photovoltaic panels (PV), air-source, and ground source heat pumps. The case study results show that the urban building energy model could successfully predict the heating and cooling demands in multiple spatiotemporal resolutions, while the urban energy system model provides system solutions for achieving a zero-carbon or positive energy district.

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“…A major disadvantage of this approach is that constant values for 2nd Law efficiency are only suitable for mid-range ∆T lift values. The analysis of the HP database from Jesper et al [35] reveals that η 2nd substantially decreases towards the lower and upper end of the ∆T lift range. The newly developed models [35] using the following Equation (2) and the fitting parameter a, b, c and d in Table A2, model this behaviour over a wide range of temperature lifts with significantly increased accuracy.…”

Section: Review Of Market-available Industrial Heat Pump Performance and Economic Feasibilitymentioning

confidence: 99%

Heat Pump Bridge Analysis Using the Modified Energy Transfer Diagram

et al. 2020

Self Cite

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Heat pumps are the key technology to decarbonise thermal processes by upgrading industrial surplus heat using renewable electricity. Existing insight-based integration methods refer to the idealised Grand Composite Curve requiring the full exploitation of heat recovery potential but leave the question of how to deal with technical or economic limitations unanswered. In this work, a novel Heat Pump Bridge Analysis (HPBA) is introduced for practically targeting technical and economic heat pump potential by applying Coefficient of Performance curves into the Modified Energy Transfer Diagram (METD). Removing cross-Pinch violations and operating heat exchangers at minimum approach temperatures by combined application of Bridge Analysis increases the heat recovery rate and reduce the temperature lift to be pumped at the same time. The insight-based METD allows the individual matching of heat surpluses and deficits of individual streams with the capabilities and performance of different market-available heat pump concepts. For an illustrative example, the presented modifications based on HPBA increase the economically viable share of the technical heat pump potential from 61% to 79%.

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Large-scale heat pumps: Uptake and performance modelling of market-available devices

Cited by 51 publications

References 12 publications

Reference applications for renewable heat

Reference applications for renewable heat

Novel Energy System Design Workflow for Zero-Carbon Energy District Development

Heat Pump Bridge Analysis Using the Modified Energy Transfer Diagram

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