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Thermo-economic optimization of a hybrid solar district heating plant with flat plate collectors and parabolic trough collectors in series

机译：平板收集器和抛物槽收集器串联的混合太阳能区域供热厂的热经济优化

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摘要

Large-scale solar heating plants for district heating networks have gained great success in Europe, particularly in Denmark. A hybrid solar district heating plant with 5960 m(2) flat plate collectors and 4039 m(2) parabolic trough collectors in series was built in Taars, Denmark in 2015. The solar heating plant was used as a reference case in this study. A validated TRNSYS-GenOpt model was set up to optimize the key design parameters of the plant, including areas of both collector types, storage size, orientation of the parabolic trough collectors and so on. This study introduces a generic method to optimize the hybrid solar district heating systems based on levelized cost of heat. It is found that the lowest net levelized cost of heat of hybrid solar heating plants could reach about 0.36 DKK/kWh. The system levelized cost of heat can be reduced by 5-9% by use of solar collectors in the district heating network in this study. The results also show that parabolic trough collectors are economically feasible for district heating networks in Denmark. The generic and multivariable levelized cost of heat method can guide engineers and designers on the design, construction and control of large-scale solar heating plants.
机译：在欧洲，特别是在丹麦，用于区域供热网络的大型太阳能供热厂获得了巨大的成功。 2015年，在丹麦的塔尔建成了一个混合太阳能集中供热厂，该集中供热厂串联了5960 m（2）平板集热器和4039 m（2）抛物槽集热器。该研究中以太阳能供热厂为参考案例。建立了经过验证的TRNSYS-GenOpt模型来优化工厂的关键设计参数，包括两种收集器类型的面积，存储大小，抛物槽收集器的方向等。本研究介绍了一种基于均热成本来优化混合太阳能区域供热系统的通用方法。结果发现，混合太阳能供热厂的最低净净平准化热成本可以达到约0.36 DKK / kWh。在这项研究中，通过在区域供热网络中使用太阳能收集器，可以将系统级的供热成本降低5-9％。结果还表明，抛物线槽收集器对于丹麦的区域供热网络在经济上是可行的。通用且多变量的均热成本法可以指导工程师和设计师进行大型太阳能供热厂的设计，建造和控制。

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