Energy use and energy efficiency in cruise ship hotel systems in a Nordic climate

Brækken, August; Gabrielii, Cecilia; Nord, Nataša

doi:10.1016/j.enconman.2023.117121

Cited by 10 publications

(4 citation statements)

References 31 publications

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“…However, there are challenges in integrating heat pumps into ships, such as limited space, complexity, upfront costs, and the need to be installed near the heat source [21]. The speed of response of water heat pump systems also tends to be slower than with local direct-electric heating.…”

Section: Heat Pumps In Battery-electric Shipsmentioning

confidence: 99%

Case Study on the Heat Pump Integration for Enhanced Efficiency in Battery-Electric Short-Sea Ferries

Brötje,

Mühmer,

Schwedt

et al. 2024

Moses

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This case study investigates the potential of incorporating water heat pumps into onboard thermal systems to utilize low-temperature waste heat for onboard heating and enhance the efficiency and economics of all-electric battery-driven ferries. We analysed a hybrid-driven roll-on/roll-off passenger ferry operating in the Baltic Sea, gathering data on vessel operation, power, and heat provision in low-temperature cycles. We integrated real-time measurement data, energy flow analysis, and thermodynamic calculations to draw conclusions for a potential battery retrofit scenario featuring an all-electric operation and a battery system capacity of 10 MWh. Our results indicate that the integration of heat pumps in battery-electric mode can cover more than 50 % of the onboard nominal heat capacity of HVAC systems, with a seasonal coefficient of performance (SCOP) of 3.5 during the heating season. The overall electric energy demand of the vessel during the 6-month heating period is reduced by approximately 8 % compared with direct-electric heating.

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Section: Heat Pumps In Battery-electric Shipsmentioning

confidence: 99%

Case Study on the Heat Pump Integration for Enhanced Efficiency in Battery-Electric Short-Sea Ferries

Brötje,

Mühmer,

Schwedt

et al. 2024

Moses

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“…Our estimated total wake power was thus ∼3 times lower than expected, indicating either an unaccounted energy loss in the system, or that our methodological approach does not capture all the turbulence in the wake. Part of the losses for the RoPax case could be explained by its comparatively higher hotel load (all energy demanding activities onboard not related to propulsion), which is usually 30-40% of the total engine load, mainly due to passenger-related services (Micoli et al, 2021;Braekken et al, 2023). Consequently, a smaller portion of the installed power will be converted to trust power on a passenger vessel, which is a likely explanation to why the estimated total power was smaller relative the installed power for the RoPax than for the Tanker.…”

Section: Turbulent Wake Intensity and Decaymentioning

confidence: 99%

Hydrographical implications of ship-induced turbulence in stratified waters, studied through field observations and CFD modelling

Nylund,

Hassellöv,

Tengberg

et al. 2023

Front. Mar. Sci.

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Ship-related energy pollution has received increasing attention but almost exclusively regarding radiated underwater noise, while the effect of ship-induced turbulence is lacking in the literature. Here we present novel results regarding turbulent wake development, the interaction between ship-induced turbulence and stratification, and discuss the impact of turbulent ship wakes in the surface ocean, in areas with intense ship traffic. The turbulent wake development was studied in situ, using Acoustic Doppler Current Profilers (ADCP) and conductivity, temperature, depth (CTD) observations of stratification, and through computational fluid dynamics (CFD) modelling. Our results show that the turbulent wake interacts with natural hydrography by entraining water from below the pycnocline, and that stratification influences the turbulent wake development by dampening the vertical extent, resulting in the wake water spreading out along the pycnocline rather than at the surface. The depth and intensity of the turbulent wake represent an unnatural occurrence of turbulence in the surface ocean. The ship-induced turbulence can impact local hydrography, nutrient dynamics and increase plankton mortality due to physical disturbance, especially in areas with intense traffic. Therefore, sampling and modelling of e.g., contaminants in shipping lanes need to consider hydrographic conditions, as stratification may alter the depth and spread of the wake, which in turn governs dilution. Finally, the frequent ship traffic in estuarine and coastal areas, calls for consideration of ship-induced turbulence when studying hydrographic processes.

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“…Industries that have a significant impact on the environment, including the iron and steel sector and the cement business utilizing biomass, have been subject to notable and rigorous regulations [10][11][12][13]. Similarly, similar approaches to successfully reduce and limit pollution emissions across multiple infrastructure sectors are also being carefully considered and evaluated [14][15][16][17], including transportation systems [18][19][20], and residential communities [21][22][23]. The strategic and essential deployment of hydrogen as a versatile energy vector is increasingly acknowledged as a key approach for the overall and thorough decarbonization of all sectors, serving as a solution and a feasible alternative to minimize the dependence on fossil fuels [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Socio-Economic Barriers to Adopting Energy-Saving Bioclimatic Strategies in a Mediterranean Sustainable Real Estate Setting: A Quantitative Analysis of Resident Perspectives

Vassiliades,

Minterides,

Astara

et al. 2023

Energies

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In response to escalating environmental challenges, this research underscores the pivotal role of sustainable construction practices, particularly focusing on bioclimatic design as a foundational element within the realm of sustainable architecture and environmental upgrading of buildings, within the broader context of sustainable urban planning. The study delves into the perspectives of residents in Cyprus concerning bioclimatic building design. Employing a quantitative methodology, the investigation aims to comprehensively assess homeowner views on the benefits, motivations, concerns, and preferred techniques associated with bioclimatic design. By comprehending these perspectives and contextual factors, this study identifies obstacles hindering broader implementation and illuminates why adoption remains limited, despite the potential for substantial energy and emissions reductions. The research also examines the background of respondents, such as heating/cooling systems, energy expenses, and upgrade preferences, to provide essential context for the findings. A structured questionnaire was administered to a stratified sample of 150 pedestrians in the Pafos area, ensuring a representative cross-section of the local population. This method allowed for a robust examination of demographic influences on opinions and an in-depth analysis of the impact of residential characteristics. The findings reveal a substantial influence of cost considerations in shaping decisions related to residential property development and the renovation of existing structures, contributing to the limitation of widespread adoption across the island. This influence persists even as a majority of respondents express a readiness to undertake building energy upgrades, among which, the most popular actions include the installation of specialized glass, the replacement of traditional air conditioning units with inverters, and the adoption of energy-efficient lighting. The research culminates in the proposal that introducing financial incentives has the potential to enhance homeowner participation in bioclimatic and energy upgrades. This recommendation is particularly salient in the climatic context of Cyprus, where the implementation of solar control measures emerges as a promising avenue for bolstering energy efficiency. In considering the socio-economic dimensions implicit in these findings, it becomes evident that the interplay between financial considerations and sustainable construction practices is a critical aspect. The identified barriers underscore the necessity for nuanced strategies and policy frameworks that address the socio-economic dimensions of bioclimatic design adoption. In this context, the study contributes to the existing body of knowledge by shedding light on the intricate relationship between financial factors and sustainable architectural practices, offering implications for future research endeavors and potential avenues for policy interventions.

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Energy use and energy efficiency in cruise ship hotel systems in a Nordic climate

Cited by 10 publications

References 31 publications

Case Study on the Heat Pump Integration for Enhanced Efficiency in Battery-Electric Short-Sea Ferries

Case Study on the Heat Pump Integration for Enhanced Efficiency in Battery-Electric Short-Sea Ferries

Hydrographical implications of ship-induced turbulence in stratified waters, studied through field observations and CFD modelling

Socio-Economic Barriers to Adopting Energy-Saving Bioclimatic Strategies in a Mediterranean Sustainable Real Estate Setting: A Quantitative Analysis of Resident Perspectives

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