Various researchers in the field of engineering have used porous media for many years. The present paper studies heat enhancement using two different types media. In first type, metal foam was experimentally and numerically extraction. medium replaced with a structure Gyroid model triply periodic minimum surfaces technique second type. Darcy–Brinkman combined energy equation whereas Navier–Stokes equations were implemented uniqueness this approach that it treated as solid model. tested...

ABSTRACT This paper presents an optimization study of the thermal performance a double U‐tube borehole heat exchanger (BHE) with two independent circuits that can be used in energy storage. The applies Taguchi method and utility concept to obtain optimum parameters for objective functions: maximum transfer rate effectiveness BHE. A validated numerical model fully implicit is applied compute transient results revealed optimal factors (denoted letters numbers showing their levels) achieving...

In this paper thermodynamic modeling of organic Rankine cycle (ORC) driven by parabolic trough solar collectors is presented.Eight working fluids for the ORC were examined.The effect turbine inlet temperature on main energetic and exergetic performance parameters studied.The influences size parameter, outlet volume flow rate expansion ratio also investigated.Important including irreversibility total exergy destruction included in analysis evaluated.The study reveals that increasing results...

In this paper, comprehensive analysis of combined effect major influencing parameters on heat transfer in the single U-tube BHE (sBHE) and double (dBHE) with two independent circuits was performed by using validated numerical model. Geometrical parameters, such as shank spacing (with maximum, average minimum values) borehole diameter (large, medium small sizes) depth (shallow, deep depths) well thermal conductivity soil grout which ranges from to high value were considered. The impact these...

Designing of a solar heating system involves appropriate sizing different components based on predicted insolation and load demand.But, it is complex problem due to unpredictable weather data components.A number design methods are available for systems.In this paper, f-chart method has been used its simplified procedure, analysis low cost in selecting the sizes type collectors estimating annual thermal performance system.Using method, liquid estimation fraction total (domestic water space...

This work presents a thermodynamic analysis of poly-generation system powered by solar energy using parabolic trough collectors. The is composed an organic Rankine cycle (ORC), multiple effect distillation and absorption cooling unit. based on the solution mass, exergy balances set equations all components system. It also technical specifications sub-systems working fluid properties. validation computer program achieved systematically. performance plant investigated under Riyadh weather...

<p>Ground source heat pump systems (GSHPs) are currently being widely applied to space heating and cooling due their high efficiency reduced environmental impact running cost. Borehole exchanger (BHE) is the key component that determines performance total cost of GSHPs. This thesis primarily focuses on transient transfer modeling, simulation, analysis single double U-tube borehole with two independent circuits. Numerical model predicts BHE configuration was developed. The developed...

<p>Ground source heat pump systems (GSHPs) are currently being widely applied to space heating and cooling due their high efficiency reduced environmental impact running cost. Borehole exchanger (BHE) is the key component that determines performance total cost of GSHPs. This thesis primarily focuses on transient transfer modeling, simulation, analysis single double U-tube borehole with two independent circuits. Numerical model predicts BHE configuration was developed. The developed...

In this paper, a comprehensive analysis of the combined effect major influencing parameters on heat transfer in single U-tube BHE (sBHE) and double (dBHE) with two independent circuits was performed by using validated numerical model. Geometrical parameters, such as shank spacing (with maximum, average, minimum values), borehole diameter (large, medium, small sizes), depth (shallow, deep depths) well thermal conductivity soil grout, which ranges from to high values, were considered. The...

This study presents the development of a novel computational technique for modeling transient heat transfer in outer and inner regions single U-tube ground exchanger. The approach couples forward-difference numerical with well-established analytical method aim reducing two-dimensional axisymmetric problem into one-dimensional problem, which has benefit time. Furthermore, suggested is numerically stable compared to full scheme, solution converges time step up 150 min. because computes...

In this paper, comprehensive analysis of combined effect major influencing parameters on heat transfer in the single U-tube BHE (sBHE) and double (dBHE) with two independent circuits was performed by using validated numerical model. Geometrical parameters, such as shank spacing (with maximum, average minimum value) borehole diameter (large, medium small size) depth (shallow, deep depth) well thermal conductivity soil grout which ranges from to high value were considered. The impact these...