Analysis of the Influence Factors of the Crude Oil Temperature Maintenance System of Solar Sewage Heat Pumps in Cold Regions

Shangwen Zhu, Xiaohua Gu (), Mengyi Duan, Feiyang Yu, Danyi Zhao, Siwen Liu and Yan Liu ()
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Shangwen Zhu: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China
Xiaohua Gu: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China
Mengyi Duan: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China
Feiyang Yu: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China
Danyi Zhao: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China
Siwen Liu: College of Innovative Material & Energy, Hubei University, Wuhan 430062, China
Yan Liu: School of Energy and Building Environment, Guilin University of Aerospace Technology, Guilin 541004, China

Energies, 2023, vol. 16, issue 24, 1-21

Abstract: Traditional crude oil heating methods that use fossil fuels or electricity have the disadvantages of high consumption of nonrenewable resources, low energy utilization, and high carbon emissions. Therefore, it is urgent to develop green and sustainable crude oil heating technologies. In this paper, a solar synergistic sewage heat pump (SSHS) dual heat source crude oil temperature maintenance system is proposed. The system utilizes clean and sustainable solar energy to heat crude oil while combining sensible heat storage technology and the waste heat utilization technology of a sewage source heat pump to solve the unstable fluctuation of the solar heating problem. A simulation and analysis model is established to analyze the influencing factors of the SSHS, and the optimal operation scheme is provided. The results show that the efficiency of the solar collector decreases and the proportion of crude oil heating increases with an increase in the solar energy guarantee rate, while the unit flow rate of the pump has a large impact on the performance of the sewage source heat pump. In order to avoid energy waste, it is more appropriate to adopt a 30% guarantee rate and an A3 pump unit flow rate, under which the solar collector efficiency is 50.18%, the proportion of solar heating of crude oil is 47.16%, the average temperature of crude oil is 42.59 °C, and the COP of the sewage source heat pump is 4.65. Further increases in the COP of the wastewater source heat pump can be realized by increasing the temperature of the wastewater supply. The results of this study provide a valuable reference for the optimization of crude oil storage heating systems.

Keywords: solar energy; sewage source heat pump; crude oil; TRNSYS; system operating characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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