Results 31 to 40 of about 2,294 (257)

Wellbore Storage Effects in Geothermal Wells [PDF]

Society of Petroleum Engineers Journal, 1980
Abstract The early-time response in the well testing of a homogeneous reservoir customarily is expected to give a unit slope when the logarithm of pressure is plotted vs. the logarithm of time. It is shown that this response is a special case and that another non-dimensional parameter must be defined to describe the set of curves that ...
openaire   +2 more sources

Geothermal Well Systems

, 2013
Geothermal well systems utilize the thermal energy of clean groundwater of hydraulically highly conductive aquifers with water tables close to the surface. The thermal energy of water produced from the well can be extracted by means of heat pumps. Such systems are also called two-well-systems, water–water-heat-pump-systems, or groundwater heat pump ...
Ingrid Stober, Kurt Bucher
openaire   +1 more source

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

Advanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source

Casing failure identification of long-abandoned geothermal wells in Field Dieng, Indonesia

Geothermal Energy, 2019
Integrity issues create challenges for maintaining the production of mature geothermal wells. Such problems are likely to occur in wells designed according to oil and gas standards, without considering the extreme geothermal environment.
B. T. H. Marbun, R. H. Ridwan, S. Z. Sinaga, B. Pande, B. A. Purbantanu   +4 more
doaj   +1 more source

Models for geothermal wells [PDF]

, 1980
The problem of two-phase flow pressure loss is examined in order to give an answer to the problem of determination of the wellhead conditions. For this purpose two models have been developed, the first based on the pattern structure of the flow and the second on the mixing length theory.
openaire   +1 more source

Rare‐Earth Yttrium Doping Advances High‐Performance AgSbTe2 Thermoelectrics

Advanced Energy Materials, EarlyView.
Y‐doped AgSbTe2 achieves band and microstructure co‐optimization, with coherent Y‐Ag2Te interfaces enhancing phonon scattering and reducing lattice thermal conductivity to 0.26 W m−1 K−1. Combined with valence‐band broadening and increased carrier concentration, this yields ZT ≈ 2 at 623 K, average ZT = 1.5, and 7.3 % conversion efficiency of a single ...
Lan Li, Xiao‐Lei Shi, Min Zhang, Siqi Liu, Meng Li, Nanhai Li, Tianyi Cao, Boxuan Hu, Qingyi Liu, Raza Moshwan, Mahboobeh Shahbazi, Zhi‐Gang Chen   +11 more
wiley   +1 more source

Uncovering renewable energy policy impact channels on land values, the local farm structure, and farmland heterogeneity

American Journal of Agricultural Economics, EarlyView.
Abstract Germany's Renewable Energy Sources Act (REA), enacted in 2000 and subsequently amended, subsidized national renewable energy production with fixed feed‐in tariffs for renewable energy sources (RE) from wind, solar, and biogas. Empirical studies suggest that the policy was creating windfall effects for landowners and attribute farmland use ...
Lars Isenhardt, Stefan Seifert, Saskia Wolff, Tobia Lakes, Marten Graubner, Axel Werwatz, Silke Hüttel   +6 more
wiley   +1 more source

Impact of Cattaneo–Christov Heat and Mass Flux on MHD Hybrid Nanofluid Flow Over an Extending Surface With Convective and Mass Flux Effects

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study investigates the flow of a magnetized hybrid nanofluid over a permeable stretching surface. The mass and thermal transport within the system is regulated using the Cattaneo–Christov flux theory. The fluid is additionally subjected to thermophoresis, chemical reaction, Brownian motion, and activation energy effects.
Ebrahem A. Algehyne, Abdul Bariq, Mounirah Areshi, Fahad Maqbul Alamrani, Zehba Raizah, Izharul Haq, Anwar Saeed   +6 more
wiley   +1 more source

Impact of well placement and flow rate on production efficiency and stress field in the fractured geothermal reservoirs

Deep Underground Science and Engineering
Geothermal energy has gained wide attention as a renewable alternative for mitigating greenhouse gas emissions. The advancements in enhanced geothermal system technology have enabled the exploitation of previously inaccessible geothermal resources ...
Xinghui Wu, Meifeng Cai, Xu Wu, Ketong Zhang, Ziqing Yin, Yu Zhu   +5 more
doaj   +1 more source

A review on geothermal wells: Well integrity issues

Journal of Cleaner Production, 2020
Abstract Geothermal energy is an important potential and a strategic area for developing activities regarding renewable energy and future studies. It involves a great potential and a main role in the worldwide energy sector, particularly electricity generation.
openaire   +2 more sources