Method for Calculating Short-term Non-interference Nominal Heat Rate of Deep Coaxial Heat Exchangers

doi:10.19657/j.geoscience.1000-8527.2022.053

Geoscience ›› 2022, Vol. 36 ›› Issue (05): 1440-1446.DOI: 10.19657/j.geoscience.1000-8527.2022.053

• Carbon Storage Science and Geothermal Development • Previous Articles

Method for Calculating Short-term Non-interference Nominal Heat Rate of Deep Coaxial Heat Exchangers

TANG Changfu¹^,²(), LUO Wanjing³(), HUANG Junwei³

1. Exploration Research Institute, Anhui Provincial Bureau of Coal Geology, Hefei, Anhui 230088, China
2. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
3. School of Energy Resources, China University of Geosciences, Beijing 100083, China

Received:2022-03-02 Revised:2022-06-23 Online:2022-10-10 Published:2022-11-03
Contact: LUO Wanjing

Abstract

Abstract:

Based on basic underground heat transfer mechanism, an analytical solution of the mean inlet and outlet fluid temperature, accounting for the geothermal gradient effect is formulated for deep coaxial heat exchanger. An approximate solution is also derived. Furthermore, a method for calculating short-term non-interference nominal heat rate of deep coaxial heat exchangers is developed and validated by comparison with published results. It is revealed that the nominal heat rate is a linear function of geothermal gradient. The analytical method proposed here is very practical and requires less computation cost, which enables rapid evaluation of short-term thermal capacity of deep coaxial heat exchangers.

Key words: coaxial heat exchanger, geothermal gradient, nominal heat rate, analytical solution

CLC Number:

P618.1
TE34

TANG Changfu, LUO Wanjing, HUANG Junwei. Method for Calculating Short-term Non-interference Nominal Heat Rate of Deep Coaxial Heat Exchangers[J]. Geoscience, 2022, 36(05): 1440-1446.

Figures/Tables 3

References 15

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Method for Calculating Short-term Non-interference Nominal Heat Rate of Deep Coaxial Heat Exchangers

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