کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6326798 1619757 2015 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spatial resolution of anthropogenic heat fluxes into urban aquifers
ترجمه فارسی عنوان
رفع اشکال شار حرارتی انسانی در آبخوانهای شهری
کلمات کلیدی
جزیره گرمایی شهری، شار حرارتی، درجه حرارت آب زیرزمینی، شار حرارت گرمایشی، تعادل انرژی شهری،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- A spatially resolved model of subsurface anthropogenic heat fluxes is developed.
- The most dominant local heat fluxes are caused by district heating networks.
- Heat flow mainly stems from buildings and elevated ground surface temperatures.
- The thermal gradient of the unsaturated zone greatly impacts the heat fluxes.
- Subsurface anthropogenic heat fluxes provide a sustainable geothermal potential.

Urban heat islands in the subsurface contain large quantities of energy in the form of elevated groundwater temperatures caused by anthropogenic heat fluxes (AHFS) into the subsurface. The objective of this study is to quantify these AHFS and the heat flow they generate in two German cities, Karlsruhe and Cologne. Thus, statistical and spatial analytical heat flux models were developed for both cities. The models include the spatial representation of various sources of AHFS: (1) elevated ground surface temperatures, (2) basements, (3) sewage systems, (4) sewage leakage, (5) subway tunnels, and (6) district heating networks. The results show that the district heating networks induce the largest AHFS with values greater than 60 W/m2 and one order of magnitude higher than fluxes from other sources. A covariance analysis indicates that the spatial distribution of the total flux depends mainly on the thermal gradient in the unsaturated zone. On a citywide scale, basements and elevated ground surface temperatures are the dominant sources of heat flow. Overall, 2.1 PJ/a and 1.0 PJ/a of heat are accumulated on average in Karlsruhe and the western part of Cologne, respectively. Extracting this anthropogenically originated energy could sustainably supply significant parts of the urban heating demand. Furthermore, using this heat could also keep groundwater temperatures from rising further.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 524–525, 15 August 2015, Pages 427-439
نویسندگان
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