Environmental and energy saving potential from greywater in hotels

Sayegh, Marderos Ara; Ludwińska, A.; Rajski, Krzysztof; Dudkiewicz, Edyta

doi:10.1016/j.scitotenv.2020.143220

Cited by 20 publications

(14 citation statements)

References 73 publications

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“…The simplest and most popular solution is the use of shower heat exchangers [25,26]. However, there are known cases where the source of waste energy is the drain water discharged from a larger number of sanitary facilities [27,28]. All this means that the expected payback period can vary over a wide range.…”

Section: Introductionmentioning

confidence: 99%

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Kordana-Obuch

Starzec

2022

Energies

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Wastewater has significant potential as a source of clean energy. This energy can be used both within external sewer networks and on the scale of individual residential buildings, and the use of shower heat exchangers appears to be the most reasonable solution. However, in the case of Poland, the problem is still the unwillingness of society to use this type of solution, caused mainly by the lack of space for the installation of vertical drain water heat recovery (DWHR) units and the low efficiency of horizontal units. In response to this issue, the efficiency of a new compact shower heat exchanger designed to be mounted below the shower tray, as well as its linear counterpart, was investigated under various operating conditions. In addition, the financial efficiency of using the compact DWHR unit with average water consumption for showering was evaluated. For this purpose, discount methods were used to estimate the financial efficiency of investments. The study showed that the compact shower heat exchanger has higher efficiency than its linear counterpart. Depending on the temperature of cold water and the flow rate of both media through the heat exchanger, it achieves efficiencies ranging from 22.43% to 31.82%, while the efficiency of the linear DWHR unit did not exceed 23.03% in the study. The financial analysis showed that its use is particularly beneficial when the building uses an electric hot water heater. The investment’s sensitivity to changes in the independent variables is small in this case, even with low water consumption per shower. The only exceptions are investment outlays. Therefore, the compact DWHR unit is a clean energy device, which in many cases is financially viable.

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Section: Introductionmentioning

confidence: 99%

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Kordana-Obuch

Starzec

2022

Energies

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“…Research also exists on strategies in reducing resource consumption, managing waste, and promoting more responsible consumer behaviour in hospitality settings (Arun et al, 2021). However, research on the circular economy and the hospitality sector remains under-developed (Sorin & Sivarajah 2021), with few publications specifically addressing this topic (e.g., Giamouri et al, 2021;Sayegh et al, 2021), given its recent emergence. There is, therefore, a need to investigate how circular economy aspects apply to the hospitality sector, especially SMEs, which tend to have access to less resources than larger businesses; and to identify strategies that businesses could apply in promoting circular economy principles into their business activities.…”

Section: Introductionmentioning

confidence: 99%

Hospitality SMEs and the circular economy: strategies and practice post-COVID

Bowen

Dowell

Morris

2023

BFJ

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PurposeThis research evaluates specific circular economy issues in relation to the hospitality sector. This is investigated in the aftermath of the COVID-19 pandemic, considering the impact that the experiences of UK hospitality SMEs had on their circular economy activities. Viewed through a resource bricolage lens, for some this was a consequence of the challenges of the pandemic, while others were proactive in pursuing circular economy strategies.Design/methodology/approachA sequential mixed methods research design is established based on a pragmatic worldview. The first phase analyses secondary data from the Business Insights and Conditions Survey (BICS) to evaluate circular economy aspects on hospitality businesses in the context of the COVID-19 pandemic. Phase 2 collects and analyses qualitative semi-structured interview data from directors of hospitality SMEs to investigate the experiences of businesses in this research context.FindingsResults point to a desire for hospitality SMEs to engage in circular economy activities, especially as a means of achieving financial efficiency, however this is sometimes constrained by increased costs. Resource bricolage theory underlines potential advantages for SMEs to engage with the local community to support circular economy activities and bring mutual benefits.Originality/valueThis research contributes to the under-researched topic of circular economy issues in hospitality SMEs. The focus on SMEs is significant as small businesses are more resource-constrained than larger businesses. The context of the post-COVID period is also notable due to changing attitudes towards circular economy aspects from the experiences of the pandemic.

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“…The share of hot water heating in the balance of energy consumption in a household may, however, be much higher and reach up to 30% [4]. In the case of hotels, it can be up to 40% [5]. Consequently, the heating of hot water contributes to significant emissions of carbon dioxide, methane, and other greenhouse gases into the atmosphere [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…The heat it carries is available all year round, and the potential for its use for heating hot water, unlike other renewable energy sources, increases in winter, when the cold water temperature is lowest and heating it requires the most energy. In the case of residential buildings, energy from greywater is recovered mainly by means of shower heat exchangers [5,29,30]. However, studies show that the heat source may also be the greywater discharged from other household appliances [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Feasibility of Implementing Shower Heat Exchangers in Residential Buildings Based on Users’ Energy Saving Preferences

2021

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In Poland, domestic hot water is heated mainly using fossil fuel energy sources. Such an approach results in the depletion of natural resources, pollution of the atmosphere and, consequently, irreversible changes to the climate. In response to this problem, this research identified the factors that most determine energy savings for heating water in residential buildings, as well as those that affect the choice of an alternative energy source. Additionally, the possibility of implementing shower heat exchangers in existing and newly built residential buildings was assessed, as well as society’s willingness to use such devices. The research was carried out on a sample of 462 inhabitants of the Podkarpackie Voivodeship (Poland). A questionnaire survey was used as a tool. The conducted research has shown that the perspective of environmental protection is not a sufficient motivator to save energy for heating domestic hot water. It is necessary to implement appropriate programs aimed at informing the public about the possibilities offered by the use of alternative energy sources and co-financing the purchase of appropriate devices. In the case of drain water heat recovery systems, a significant problem is also the need to develop new, highly effective designs of shower heat exchangers which can be installed under the floor linear shower drain or on the horizontal shower waste pipe.

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Environmental and energy saving potential from greywater in hotels

Cited by 20 publications

References 73 publications

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative

Hospitality SMEs and the circular economy: strategies and practice post-COVID

Assessment of the Feasibility of Implementing Shower Heat Exchangers in Residential Buildings Based on Users’ Energy Saving Preferences

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