scholarly journals Numerical Model for the Capacity Evaluation of Shallow Groundwater Heat Pumps in Beijing Plain, China

2011 ◽  
Vol 10 ◽  
pp. 881-889 ◽  
Author(s):  
Q.C. Yang ◽  
J. Liang ◽  
L.C. Liu
Keyword(s):  
Numerical Model ◽  
Shallow Groundwater ◽  
Heat Pumps ◽  
Beijing Plain ◽  
Capacity Evaluation ◽  
Groundwater Heat Pumps

Numerical model for the in-plane seismic capacity evaluation of tall plasterboard internal partitions

2018 ◽  
Vol 122 ◽  
pp. 572-584 ◽  
Author(s):  
Crescenzo Petrone ◽  
Orsola Coppola ◽  
Gennaro Magliulo ◽  
Pauline Lopez ◽  
Gaetano Manfredi
Keyword(s):  
Numerical Model ◽  
Seismic Capacity ◽  
Capacity Evaluation

Study on the Influence of Shallow Groundwater Source Heat Pumps on Groundwater Quality in Weifang, China

2014 ◽  
Vol 641-642 ◽  
pp. 97-100
Author(s):  
Qiang Huang ◽  
Wei Ping Wang ◽  
Hai Yan Deng
Keyword(s):  
Groundwater Quality ◽  
Heat Pump ◽  
Shallow Groundwater ◽  
Heat Pumps ◽  
Total Hardness ◽  
Project Area ◽  
Research Objects ◽  
Groundwater Source ◽  
Change Curve

Selecting 4 shallow groundwater source heat pump (GSHP) projects as research objects in Weifang city of Shandong province, China, the groundwater quality in the project area was, observed and analyzed by sampling continuously. The results show that the concentrations of chloride and the total hardness are relatively stable, and there are no apparent changes; In the change curve of TDS in different kind of shallow GSHPs, the worse the sealing condition of the project, the more obvious the rising trend of TDS; The concentration of nitrate is generally on the rise, and the concentration of ammonia appears in the trend of first increased then decreased. Therefore, in the region, the shallow GSHPs are not completely free from contamination in the current technology conditions and the application should be controlled and managed strictly. The observation of shallow GSHPs still need be conducted in a long term.

Validation of a numerical model aimed at the estimation of performance of vapor compression based heat pumps

2012 ◽  
Vol 47 ◽  
pp. 411-420 ◽  
Author(s):  
Massimiliano Scarpa ◽  
Giuseppe Emmi ◽  
Michele De Carli
Keyword(s):  
Numerical Model ◽  
Heat Pumps ◽  
Vapor Compression

scholarly journals Estimation of direct evaporation from groundwater by using lysimeters in the Salar de Pedernales basin, Chilean Altiplano

2020 ◽  
Vol 30 ◽  
pp. 1-14
Author(s):  
Reynaldo Payano-Almánzar ◽  
Dimitri Dionizis
Keyword(s):  
Numerical Model ◽  
Water Balance ◽  
Shallow Groundwater ◽  
Arid Zones ◽  
Salt Flats ◽  
Chilean Altiplano ◽  
Semi Arid ◽  
Model Water

In this research an estimation of the evaporation discharges from shallow groundwater in the Salar de Pedernales basin is made, using the lysimeter methodology. The analysis performed shows values between 1400 L·s-1 and 1900 L·s-1 with an uncertainty of error of 5% with respect to the average and between 11% and 47% in relation to the minimum and maximum values which can be compared by other studies where different tools have been used to calculate evaporation, such as: chamber, numerical model, water balance, Bowen relationships, Eddy correlations, and evaporation curves vs. altitude. The results confirm that lysimeters are appropriate tools for the determination of soil evapotranspiration and evaporation from shallow groundwater, whose components are key in the hydrology of endorheic basins, arid and semi-arid zones, for the management of protected natural spaces such as salt flats, waterholes, fertile plains, and bofedales.

Integration of groundwater heat pumps into energy system optimization models

Energy ◽  
2021 ◽  
pp. 121607
Author(s):  
Smajil Halilovic ◽  
Leonhard Odersky ◽  
Thomas Hamacher
Keyword(s):  
System Optimization ◽  
Energy System ◽  
Heat Pumps ◽  
Optimization Models ◽  
Groundwater Heat Pumps

scholarly journals A qualitative description of shallow groundwater effect on surface temperature of bare soil

2009 ◽  
Vol 13 (9) ◽  
pp. 1749-1756 ◽  
Author(s):  
F. Alkhaier ◽  
R. J. Schotting ◽  
Z. Su
Keyword(s):  
Numerical Model ◽  
Soil Temperature ◽  
Skin Temperature ◽  
Soil Profile ◽  
Land Surface ◽  
Shallow Groundwater ◽  
Soil Surface ◽  
Qualitative Description ◽  
Groundwater Depth ◽  
Daily Minimum Temperature

Abstract. Whether or not shallow groundwater affects skin temperature (the temperature of soil surface) is important to detect depth and extent of shallow groundwater by dint of remote sensing and important for land surface modelling studies. Although few studies have been conducted to investigate that effect, they have yielded contradicting conclusions and they stopped in 1982. To determine that shallow groundwater affects skin temperature, we measured soil temperature at two different depths (5 and 10 cm) in seven places with variable water table depths every ten minutes and for six days. After that, we correlated the minimum, maximum and average daily temperatures to average groundwater depth. We also built a simple numerical model using a differential equations solver, Flex PDE, to simulate heat transfer into soil profile and used it to simulate groundwater effect on skin temperature. We found quite high negative correlation between the maximum and average daily soil temperature and groundwater depth. Contrarily, we could hardly find any correlation between the daily minimum temperature and groundwater depth. Numerical simulations, though simple, were useful in showing that groundwater shifted skin temperature curves up in the winter and down in the summer without affecting the shape of the curve. We conclude that shallow groundwater affects skin temperature directly by its distinctive thermal properties in the soil profile and indirectly by affecting soil moisture which in turn has many different and contradictory effects on skin temperature. This study recommends building a comprehensive numerical model that simulates the effect of shallow groundwater on skin temperature and on the different energy fluxes at land surface.

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