Thermal performance of a co-axial borehole heat exchanger

Thermal performance of a co-axial borehole heat exchanger

Raviranjan Kumar SinghRam Vinoy Sharma 

Department of Mechanical Engineering N.I.T. Jamshedpur, India

Corresponding Author Email: 
ravi.ranjan167@gmail.com
Page: 
455-466
|
DOI: 
https://doi.org/10.3166/I2M.17.455-466
Received: 
|
Accepted: 
|
Published: 
30 September 2018
| Citation

OPEN ACCESS

Abstract: 

This paper present result of thermal performance of a co-axial borehole heat exchanger for time varying inlet air temperature on a hottest and coldest day of the year 2015 at N.I.T Jamshedpur, India. Numerical method based on heat transfer correlation has been developed which validated with CFD simulation results. AICO has better performance because of lowering of outlet temperature during hottest day and increasing of outlet temperature in coldest day. Heat transfer to the soil has higher of 100W and lower short-circuiting through central pipe of around 400W difference in AICO (Annulus in Central Out) as compare to CIAO (Centre In Annulus Out).

Keywords: 

Borehole heat exchanger, thermal performance, CFD, Analytical method, AICO, CIAO

1. Introduction
2. Mathematical formulation
3. Grid generation
4. Boundary condition
5. Results and discussion
6. Conclusion
Nomenclature
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