T/CI 111-2022 Technical specification for industrial-grade distributed solar steam system

Scope

Scope: This document specifies the terms and symbols, product forms, heat demand analysis, system selection, system design, and installation and commissioning for industrial-grade distributed solar steam systems. This document is applicable to solar energy systems that use liquid (such as heat transfer oil or water) as the heat-collecting working medium, with a heating temperature above 110°C and below 400°C, for providing steam-form thermal energy for industrial production. Main technical content: 3.1.1 Industrial-grade solar steam systems (for industrial applications): A system device that integrates technologies and equipment such as solar collector arrays, transmission and distribution systems, heating systems, and control systems to provide steam and other forms of thermal energy for industrial production processes. 3.1.2 Concentrated solar steam systems: Solar steam systems that use concentrated solar collectors as the heat-collecting source. Concentrated solar collectors mainly include trough-type solar collectors and Fresnel solar collectors. 3.1.3 Non-concentrated solar steam systems: Solar steam systems that use non-concentrated solar collectors as the heat-collecting source. 3.1.4 Tracking solar steam systems: Solar steam systems in which the heat-collecting devices track the sun's movement throughout the day by rotating along a single or dual axis. 3.1.5 Non-tracking solar steam systems: Solar steam systems in which the heat-collecting devices do not track the sun's movement throughout the day. 3.2 Symbols—Daily average heat consumption, kJ;—Steam consumption during the i-th heating period, kg;—Steam enthalpy, kJ/kg;—Enthalpy of the water entering the steam generator, kJ/kg;—Daylighting area of the direct system collector, m2;—Monthly average daily solar irradiance on the local collector installation surface, kJ/(m2·d);—Solar energy guarantee rate;—Annual or monthly average heat collection efficiency of the collector based on the daylighting area;—Heat l

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