Renewable, carbon-free heat production from urban and rural water areas

Hiltunen, Erkki; Martinkauppi, Birgitta; Zhu, Li; Mäkiranta, Anne; Lieskoski, M.; Rinta-Luoma, J.

doi:10.1016/j.jclepro.2015.10.039

Cited by 8 publications

(12 citation statements)

References 34 publications

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“…Hiltunen et al [10] show a potential for sediment renewable carbon-free energy for heat production in the local area. The use of thermal energy from the solid organic sediment layer at the bottom of water bodies via heat-collection pipes, heat-carrier liquids, and heat pumps is one of the new carbon-free ways to produce energy that was investigated by the University of Vaasa.…”

Section: Introductionmentioning

confidence: 99%

“…The use of thermal energy from the solid organic sediment layer at the bottom of water bodies via heat-collection pipes, heat-carrier liquids, and heat pumps is one of the new carbon-free ways to produce energy that was investigated by the University of Vaasa. Sediment energy can be used for cooling in summer and heating in winter, as shown in the Suvilahti shallow bay in the city of Vaasa, Finland [1,10,11]. Mäkiranta et al [12] studied the correlation between the temperatures of air, heat carrier liquid, and seabed sediment in a renewable low-energy network.…”

Section: Introductionmentioning

confidence: 99%

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Statistical Investigation of Climate Change Effects on the Utilization of the Sediment Heat Energy

et al. 2022

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Suvilahti, a suburb of the city of Vaasa in western Finland, was the first area to use seabed sediment heat as the main source of heating for a high number of houses. Moreover, in the same area, a unique land uplift effect is ongoing. The aim of this paper is to solve the challenges and find opportunities caused by global warming by utilizing seabed sediment energy as a renewable heat source. Measurement data of water and air temperature were analyzed, and correlations were established for the sediment temperature data using Statistical Analysis System (SAS) Enterprise Guide 7.1. software. The analysis and provisional forecast based on the autoregression integrated moving average (ARIMA) model revealed that air and water temperatures show incremental increases through time, and that sediment temperature has positive correlations with water temperature with a 2-month lag. Therefore, sediment heat energy is also expected to increase in the future. Factor analysis validations show that the data have a normal cluster and no particular outliers. This study concludes that sediment heat energy can be considered in prominent renewable production, transforming climate change into a useful solution, at least in summertime.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Statistical Investigation of Climate Change Effects on the Utilization of the Sediment Heat Energy

et al. 2022

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“…The combined heat and power (CHP) station produced electricity to the heat pumps of the low energy network. The House Fair Area of Vaasa and its unique low energy network were thoroughly described by Hiltunen et al [19].…”

Section: Methodsmentioning

confidence: 99%

Seabed Sediment as an Annually Renewable Heat Source

et al. 2018

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Thermal energy collected from the sediment layer under a water body has been suggested for use as a renewable heat source for a low energy network. A prototype system for using this sediment energy was installed in Suvilahti, Vaasa, in 2008 and is still in use. It provides a carbon-free heating and cooling solution as well as savings in energy costs for 42 houses. To be a real, renewable heat source, the thermal energy of the sediment layer needs to replenish annually. The goal of this paper is to verify the possible cooling or annual heat regeneration. The sediment temperatures were measured and analyzed in the years 2013-2015. The data were compared to the same period in 2008-2009. All measurements were taken in the same place. This paper also confirms the potential of the sediment heat, especially in the seabed sediment, using the temperature differences between the lowest and the highest values for the year. The results demonstrate that the collection of the heat energy does not cause permanent cooling of the sediment. This result was obtained by calculating the temperature difference between measurements in the warmest month and the month with the coldest temperatures. This indicates the extracted energy. The difference was found to be around 9.5 • C in 2008-2009, rising to around 11 • C for the years 2013-2014 and 2014-2015. This indicates the loaded energy. The energy utilization is sustainable: the sediment temperature has not permanently decreased despite the full use of the network for the heating and cooling of houses between 2008 and 2015.

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“…There is a larger body of literature concerning district heating and cooling [9,10], as well as thermal use of ocean coastal waters [11,12] and groundwater [13,14]. There are various different applications utilizing similar heat sources/sinks that are available in many regions of the world, such as mine water [15,16], irrigation water reservoirs [17], sediments [18], wastewater [19,20], and shower water [21].…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%