Dynamic simulation and economic analysis of a combined solar thermal and pellet heating system for domestic hot water production in a traditional Hammam
Dynamic simulation and economic analysis of a combined solar thermal and pellet heating system for domestic hot water production in a traditional Hammam
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DOI：
10.1016/j.applthermaleng.2020.115839
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发表时间：
2020-11
影响因子：
6.4
通讯作者：
M. Krarouch;F. Ruesch;H. Hamdi;A. Outzourhit;M. Haller
中科院分区：
文献类型：
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作者：
M. Krarouch;F. Ruesch;H. Hamdi;A. Outzourhit;M. Haller
太阳能加热系统和低排放生物质锅炉的组合提供了在不使用不可再生能源的情况下在大型应用（多户住宅、公共部门、酒店、学校等）中生产家用热水的机会。然而，这种系统在摩洛哥还没有普及，因为传统的烧木材的锅炉仍然在各种应用中广泛用于热水目的。因此，这项工作的目的是评估的热性能和经济可行性相结合的太阳能热和颗粒加热系统的热水供应，设计的公共澡堂在气候条件下的马拉喀什，摩洛哥。此外，本文介绍了第一个小尺寸的抛物槽收集器安装设计覆盖部分热水的要求在摩洛哥。此外，使用这样的系统的潜在好处进行了讨论。动态模拟使用TRNN18能量模拟软件开发的模型进行。此外，我们研究了不同的系统配置上的组合太阳能热和颗粒加热系统的热性能的影响。采用太阳能利用率、太阳能系统效率、集热器效率和一次能源节约量等性能指标对不同供暖系统的节能效果和性能进行了比较。此外，生命周期成本法进行了财务分析，通过比较太阳能热和颗粒相结合的加热与传统系统（只有生物质）的年生命周期节省。目前的研究结果表明，在生物质系统中添加太阳能集热器在经济上是有利的。组合系统的生命周期成本最低，集热器面积为288 m2，太阳能利用率为58%。此外，与作为参考的生物质锅炉系统相比，每年可节省5，593欧元。此外，通过使用组合系统，还避免了高达234吨的二氧化碳排放。从环境角度来看，该系统对摩洛哥来说是一个有吸引力的选择，因为木材能源被广泛用于传统澡堂的热水生产。使用这种太阳能和生物量相结合的系统可能会导致显著的能源节约和二氧化碳排放量的减少，以及有限的砍伐森林在摩洛哥。
The combination of solar heating systems and low emission biomass boilers provides the opportunity to produce domestic hot water in large applications (multi-family houses, public sector, hotels, schools, etc) without the use of non-renewable energy. However, such systems are not yet widespread in Morocco, since traditional wood-fired boilers are still extensively used for water heating purposes in various applications. Therefore, the objective of this work is to evaluate the thermal performance and economic viability of a combined solar thermal and pellet heating system for hot water supply, designed for a public bathhouse under the climatic conditions of Marrakech, Morocco. Moreover, this paper presents the first small-size parabolic trough collectors installation designed for covering part of the hot water requirements in Morocco. In addition, the potential benefits of using such a system are discussed. The dynamic simulations were performed using models developed using TRNSYS 18 energy simulation software. Furthermore, we examined the effect of different system configurations on the thermal performance of the combined solar thermal and pellet heating system. The performance indicators such as solar fraction, solar system efficiency, collector efficiency and primary energy savings, are used for comparing the energy savings and the performance of these different heating systems. Besides, the life cycle cost method was carried out for the financial analysis by comparing the annual life cycle savings for the combined solar thermal and pellet heating against the conventional system (only biomass). The results presented in the current study indicate that adding solar thermal collectors to the biomass system is economically favorable. The lowest life cycle cost of the combined system was obtained with a collector area of 288 m2, which resulted in a solar fraction of 58%. In addition, an annual life-cycle savings of 5,593 € can be achieved compared to biomass boiler system taken as a reference. Moreover, up to 234 tons of CO2emissions have been avoided through the use of the combined system. Environmentally, this system can be an attractive option for Morocco where wood energy is widely used for the production of hot water in traditional Hammams. The use of such combined solar and biomass systems may result in significant energy savings and CO2emission reductions as well as limited deforestation in Morocco.