Decentralized drain water heat recovery from commercial kitchens in the hospitality sector

Spriet, Jan; McNabola, Aonghus

doi:10.1016/j.enbuild.2019.04.032

Cited by 27 publications

(29 citation statements)

References 21 publications

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“…In contrast to the copper device, no field data are available for the heat recovery potential of the PP-GR heat exchanger in the discussed application. But given a heat transfer coefficient of the PP-GR tube of 2523 W/(m 2 *K) (Technoform, 2014), we can determine an effectiveness of 60.5%, close to that of the copper heat exchanger of 58% on average, according to the manufacturer (Q-Blue b.v. 2018, Spriet and McNabola, 2019a) (Supplementary Material S4).…”

Section: Manufacture Of the Pp-gr Heat Exchangermentioning

confidence: 99%

“…UK commercial food outlets: Secondly, we determine the environmental sustainability of a heat recovery system when used with typical water consumption rates prevalent in UK commercial food outlets. The water consumption rates refer to the average rates of different food outlet categories (Spriet and McNabola, 2019a), ranging from 360 to 12,500 L/day. Heat recovery data were determined as in Spriet and McNabola (2019a), (Supplementary Material S4), taking into account the number of heat exchangers optimised for maximum financial payback with 310 open days a year over a 10 year lifetime i.e.…”

Section: Savings Potentialmentioning

confidence: 99%

“…In the UK, nearly half of the water consumption of the wider food and drink sector occurs in the hospitality and food service sub-sector, with an estimated 143 million m 3 water used in 2010 for the preparation of meals in commercial and similarly used kitchens (Bromley-Challenor et al, 2013). Spriet and McNabola (2019a) determined a total wastewater heat recovery potential for the UK food service sector of 1.4 TWh/year, and a financially viable potential of 1.24 TWh/year. The recovered heat is available for direct reuse for pre-heating the cold water supply and can hence directly contribute to the decarbonisation of hot water use.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…A bonus of heat recovery from commercial kitchens' drain water is a higher daily water use compared to an average household, which for the UK lies in the range of 360 to 12,500 L/day (Spriet and McNabola, 2019a), versus to 349 L/day in homes (EST, 2013). The heat recovery figures by Spriet and McNabola (2019a) equate to an average yearly saving of about 5400 kWh per food outlet. Installation of comparable heat recovery systems with showers have been reported to save 127-1880 kWh/year per six showers in a sports facility (Ip et al, 2018), and 130-508 kWh/year per one shower in a residential building (Wong et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Emissions down the drain: Balancing life cycle energy and greenhouse gas savings with resource use for heat recovery from kitchen drains

Schestak

Spriet

Styles

et al. 2020

Journal of Environmental Management

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Although the food service sector is a major user of water, the potential for heat recovery from commercial kitchens' drain water remains largely unexplored. For the first time, we compare the life cycle environmental burdens of producing and installing a heat recovery system with the environmental credits arising from energy savings for a restaurant case study, and for the entire UK food service sector. Life Cycle Assessment was applied to determine the impacts of heat recovery systems made from different materials and comprising a heat exchanger in the shape of a concentric double-walled pipe, pipework and fittings. The design option with the smallest environmental footprint combined a heat exchanger made out of polypropylenegraphite (PP-GR) with polyethylene pipework, exhibiting 80-99% less environmental impact compared with components made out of (35% recycled) copper. Contrasting the environmental impacts of two heat recovery set-ups with energy savings shows that a PP-GR based system pays back all seven assessed environmental impacts within two years, while payback times for the copper-based system vary depending on the replaced energy source, and can exceed the 10 year operational lifetime of the system. When looking at typical flowrates in UK food outlets, net environmental savings can be realised across all analysed impact categories above a threshold water consumption of 555 L/day, using current technology. Extrapolation to the UK food service sector indicates annual greenhouse gas emission mitigation potential of about 500 Gg CO2 equivalent.

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Section: Manufacture Of the Pp-gr Heat Exchangermentioning

confidence: 99%

Section: Savings Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Emissions down the drain: Balancing life cycle energy and greenhouse gas savings with resource use for heat recovery from kitchen drains

Schestak

Spriet

Styles

et al. 2020

Journal of Environmental Management

Self Cite

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Responding to the UN sustainability goals in transdisciplinary partnership through network action learning

Dreyer-Gibney,

Coughlan,

Coghlan

et al. 2024

Environ Dev Sustain

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The global water crisis, an enormous concern according to the World Economic Forum, poses a significant challenge to long-term sustainability, exacerbated by the high energy demand associated with water supply and treatment. As the renewable energy sector grows, the need for green technologies to support the water-energy nexus becomes evident. However, mere technological advancements are insufficient to address complex water-related challenges. This paper presents a transdisciplinary collaborative effort involving engineers, geographers, management researchers, and environmentalists working with practitioners in a cross-border network. The study explores through action learning research how, in a transdisciplinary partnership, network action learning influences the exploration and implementation of novel green technology and the development of innovation capabilities. The research is structured around three themes: green technology platforms, policy support and guidance, and dissemination and collaboration. It identifies the factors impacting technology exploration and application and how concurrently green innovation capabilities are developed. The study emphasizes the significance of transdisciplinary collaboration and offers valuable insights into addressing UN Sustainability Goals related to clean water, sustainable industry, and partnerships. It contributes to innovation capability theory and provides practical guidance to researchers, practitioners, and policymakers, emphasizing the need for holistic approaches to address the water-energy crisis and achieve sustainable development.

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A systematic literature review of carbon footprint decision-making approaches for infrastructure and building projects

Fang

Yan

et al. 2023

Applied Energy

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Decentralized drain water heat recovery from commercial kitchens in the hospitality sector

Cited by 27 publications

References 21 publications

Emissions down the drain: Balancing life cycle energy and greenhouse gas savings with resource use for heat recovery from kitchen drains

Emissions down the drain: Balancing life cycle energy and greenhouse gas savings with resource use for heat recovery from kitchen drains

Responding to the UN sustainability goals in transdisciplinary partnership through network action learning

A systematic literature review of carbon footprint decision-making approaches for infrastructure and building projects

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