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Investigation of geothermal energy utilization for thermal regulation of aquaculture raceway
International Journal of Green Energy ( IF 3.3 ) Pub Date : 2020-05-20 , DOI: 10.1080/15435075.2020.1763357
Mitchell H. Kuska 1 , Christopher T. DeGroot 1 , Kamran Siddiqui 1
Affiliation  

Aquaculture raceway temperature has a direct impact on the aquatic specie being reared. In regions that undergo significant seasonal temperature variations, the thermal management of the raceway temperature becomes a challenge, directly impacting the production yield. This study investigates a novel approach to regulate the raceway temperature in a sustainable way by utilizing geothermal energy. A numerical energy model was developed to simulate heat transfer in a geothermal system encompassing both the individual borehole heat exchangers and their thermal interactions. Simulations were conducted for different configurations of the geothermal system over a complete seasonal cycle. Results show that flow rate, number of boreholes and the borehole spacing influence the temperature of the fluid at the raceway inlet. An increase in the number of boreholes provided better thermal regulation but an increase in the flow rate through the boreholes provided less thermal regulation. A borehole spacing of 6 m was found to be appropriate to reduce thermal interference. It was also observed that an increase in the fraction of the fluid passed through the geothermal system enhances the overall thermal regulation, with higher thermal regulation at lower flow rates. Results show that when 100% of the fluid passed through a 64 boreholes geothermal system, the average regulated raceway inlet temperature was 23% higher in winter months and 16% lower in summer months at the flow rate of 21.5 L/s compared to than at 43 L/s.



中文翻译:

地热能用于水产养殖水道热调节的研究

水产养殖场温度对养殖的水生物种有直接影响。在季节性温度变化显着的地区,滚道温度的热管理成为一项挑战,直接影响产量。这项研究研究了一种利用地热能以可持续方式调节轨道温度的新方法。开发了一个数值能量模型来模拟包含单个钻孔热交换器及其热相互作用的地热系统中的传热。在一个完整的季节周期内对地热系统的不同配置进行了模拟。结果表明,流速,钻孔数量和钻孔间距会影响滚道入口处的流体温度。钻孔数量的增加提供了更好的热调节,但是通过钻孔的流量的增加提供了更少的热调节。发现6 m的井眼间距对于减少热干扰是合适的。还观察到,通过地热系统的流体比例的增加增强了整体热调节,在较低流速下具有较高的热调节。结果表明,当流量为21.5 L / s时,当100%的流体通过64孔地热系统时,冬季的平均调节水道进口温度比冬季高21.5 L / s,高23%,夏季的16%。 43升/秒 发现6 m的井眼间距对于减少热干扰是合适的。还观察到,通过地热系统的流体比例的增加增强了整体热调节,在较低流速下具有较高的热调节。结果显示,当流量为21.5 L / s时,当100%的流体通过64孔地热系统时,冬季的平均调节水道入口温度比冬季高21.5 L / s,高23%,夏季的16%。 43升/秒 发现6 m的井眼间距对于减少热干扰是合适的。还观察到,通过地热系统的流体比例的增加增强了总体热调节,在较低的流速下具有更高的热调节。结果显示,当流量为21.5 L / s时,当100%的流体通过64孔地热系统时,冬季的平均调节水道入口温度比冬季高21.5 L / s,高23%,夏季的16%。 43升/秒

更新日期:2020-05-20
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