A validated model for mixing and buoyancy in stratified hot water storage tanks for use in building energy simulations

2016 ◽  
Vol 172 ◽  
pp. 217-229 ◽  
Author(s):  
Brecht Baeten ◽  
Thomas Confrey ◽  
Sébastien Pecceu ◽  
Frederik Rogiers ◽  
Lieve Helsen
Keyword(s):  
Water Storage ◽  
Building Energy ◽  
Hot Water ◽  
Storage Tanks ◽  
Energy Simulations

scholarly journals A Solar Heating and Cooling System in a Nearly Zero-Energy Building: A Case Study in China

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Zhifeng Sun ◽  
Yaohua Zhao ◽  
Wei Xu ◽  
Xinyu Zhang ◽  
Huai Li ◽  
...  
Keyword(s):  
Solar Collector ◽  
Cooling System ◽  
Water Storage ◽  
Building Energy ◽  
Solar Heating ◽  
Hot Water ◽  
Storage Tanks ◽  
Zero Energy ◽  
Heating And Cooling ◽  
Zero Energy Building

The building sector accounts for more than 40% of the global energy consumption. This consumption may be lowered by reducing building energy requirements and using renewable energy in building energy supply systems. Therefore, a nearly zero-energy building, incorporating a solar heating and cooling system, was designed and built in Beijing, China. The system included a 35.17 kW cooling (10-RT) absorption chiller, an evacuated tube solar collector with an aperture area of 320.6 m2, two hot-water storage tanks (with capacities of 10 m3 and 30 m3, respectively), two cold-water storage tanks (both with a capacity of 10 m3), and a 281 kW cooling tower. Heat pump systems were used as a backup. At a value of 25.2%, the obtained solar fraction associated with the cooling load was close to the design target of 30%. In addition, the daily solar collector efficiency and the chiller coefficient of performance (COP) varied from 0.327 to 0.507 and 0.49 to 0.70, respectively.

Temperature stratification in hot-water storage tanks

Energy ◽  
1991 ◽  
Vol 16 (7) ◽  
pp. 977-982 ◽  
Author(s):  
K. Hariharan ◽  
K. Badrinarayana ◽  
S. Srinivasa Murthy ◽  
M.V. Krishna Murthy
Keyword(s):  
Water Storage ◽  
Hot Water ◽  
Temperature Stratification ◽  
Storage Tanks

Numerical modeling and optimization of thermal stratification in solar hot water storage tanks for domestic applications: CFD study

Solar Energy ◽  
2017 ◽  
Vol 157 ◽  
pp. 441-455 ◽  
Author(s):  
T. Bouhal ◽  
S. Fertahi ◽  
Y. Agrouaz ◽  
T. El Rhafiki ◽  
T. Kousksou ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Thermal Stratification ◽  
Water Storage ◽  
Hot Water ◽  
Storage Tanks ◽  
Modeling And Optimization

scholarly journals Empirical characterization of vertical-tube inlets in hot-water storage tanks

2020 ◽  
Vol 119 ◽  
pp. 104838
Author(s):  
Joseph D. Rendall ◽  
Kyle R. Gluesenkamp ◽  
William Worek ◽  
Ahmad Abu-Heiba ◽  
Kashif Nawaz ◽  
...  
Keyword(s):  
Water Storage ◽  
Vertical Tube ◽  
Hot Water ◽  
Storage Tanks

Performance of Rigid Porous Stratification Manifolds With Interpretation for Off-Design Operation

2013 ◽  
Author(s):  
Shuping Wang ◽  
Jane H. Davidson
Keyword(s):  
Performance Indicator ◽  
Water Storage ◽  
Operating Conditions ◽  
Hot Water ◽  
Storage Tanks ◽  
Solar Water ◽  
Inlet Flow Rate ◽  
Wide Range ◽  
Collector Efficiency ◽  
D Model

Thermal stratification of solar water storage tanks improves collector efficiency and provides higher quality energy to the user. A crucial aspect of maintaining stratification is preventing mixing in the tank, particularly during solar charging and hot water draws. An effective and simple approach to flow control is an internal stratification manifold. In this paper, the performance of the rigid porous manifold, which consists of a series of vertical hydraulic resistance elements placed within a perforated tube, is considered for charging operation. A 1-D model of the governing mass, momentum, and energy conservation equations is used to illustrate the procedure for designing a manifold and to explore its performance over a broad range of operating conditions expected in solar water storage tanks. A manifold performance indicator (MPI) is used to evaluate the effectiveness of the manifold relative to an inlet pipe positioned at the top of the tank. The rigid porous manifold improves the stratification in the tank over a wide range of operating conditions unless the inlet flow rate is significantly reduced from the design point.

The Corrosion of Domestic Galvanized Hot Water Storage Tanks

CORROSION ◽  
1953 ◽  
Vol 9 (2) ◽  
pp. 46-51
Author(s):  
I. LAIRD NEWELL
Keyword(s):  
Water Storage ◽  
Hot Water ◽  
Storage Tanks

Corrosion of Galvanized Hot Water Storage Tanks

CORROSION ◽  
1947 ◽  
Vol 3 (4) ◽  
pp. 192-200 ◽  
Author(s):  
J. M. Bialosky
Keyword(s):  
Water Storage ◽  
Hot Water ◽  
Storage Tanks
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