Abstract

World climate is an area of concern due to the use of fossil fuels that have been the most commonly preferred resource of energy since the industrial revolution and urbanization. The target to maintain the lowest level of carbon emissions and greenhouse gases has created an urge to look for renewable energy resources. Among the renewable energy resources available worldwide, solar energy is considered as one of the feasible and mature technologies in view of large-scale commercial deployment. Solar photovoltaic and solar thermal conversion (STC) techniques have been implemented so far and are still advancing towards cost-effective solutions. Parabolic trough collector (PTC) is one such economical and feasible STC technology as far as high-temperature thermal applications are concerned and are being widely used for power generation. This paper is an attempt to present the current scenario of PTC technology along with its various advancements over the years. Further in this paper, selective coatings, coating techniques and heat collection element (HCE) or receiver are discussed in detail with regard to their advancements. The present work also illustrates the progressive trends in PTC technology, particularly with respect to various heat transfer fluids, HCE inserts, selective coatings and other performance factors along with some futuristic aspects with respect to coatings and receiver inserts in view of high thermal performance.

Graphic abstract

中文翻译：

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通过抛物线槽式集热器（PTC）高效发电的热选择性涂层及其增强特性

摘要

由于使用化石燃料，自从工业革命和城市化以来，化石燃料一直是最普遍的首选能源，世界气候是一个令人关注的领域。保持最低的碳排放量和温室气体排放量的目标引起了寻找可再生能源的冲动。在全球范围内可获得的可再生能源中，考虑到大规模商业部署，太阳能被认为是可行且成熟的技术之一。迄今为止，太阳能光伏和太阳能热转换（STC）技术已得到实施，并且仍在朝着具有成本效益的解决方案发展。就高温热应用而言，抛物槽收集器（PTC）是一种经济且可行的STC技术，并且已广泛用于发电。本文试图介绍PTC技术的当前情况及其多年来的各种进步。此外，在本文中，针对选择性涂层，涂层技术和集热元件（HCE）或接收器的发展进行了详细讨论。本工作还说明了PTC技术的发展趋势，特别是在各种传热流体，HCE嵌件，选择性涂层和其他性能因素方面，以及从高热性能方面对涂层和接收件嵌件的一些未来派观点。关于涂层技术和集热元件（HCE）或接收器的发展，将对其进行详细讨论。本工作还说明了PTC技术的发展趋势，特别是在各种传热流体，HCE嵌件，选择性涂层和其他性能因素方面，以及从高热性能方面对涂层和接收件嵌件的一些未来派观点。关于涂层技术和集热元件（HCE）或接收器的发展，将对其进行详细讨论。本工作还说明了PTC技术的发展趋势，特别是在各种传热流体，HCE嵌件，选择性涂层和其他性能因素方面，以及从高热性能方面对涂层和接收件嵌件的一些未来派观点。

图形摘要