1. Performance characterization of a novel integrated radiant wall system for sustainable heating.
- Author
-
Elfadeel, Shehab M. Abd, Hassan, Muhammed A., Aljabr, Ahmad, and Alharbi, Bader
- Subjects
- *
CLEAN energy , *CLIMATIC zones , *SOLAR energy , *HEAT capacity , *FINITE element method - Abstract
To address the United Nation's sustainable development goal of clean energy, new concepts are required to utilize renewable energy efficiently in buildings. One of the barriers against building-integrated solar thermal systems is the diluted outlet temperatures in winter, corresponding to large demand magnitudes. This study proposes a new design of an integrated and double-insulated active heating wall system, comprising an unglazed solar collector and a low-temperature radiant heating terminal. A hybrid resolution quasi-dynamic finite element model is developed, validated, and then used to test the system performance in a typical cold climate zone. The results suggest achievable daylight average heating capacities up to 60.82 W m−2 and demonstrate a passive heating effect during nighttime hours when the water circulation is disabled. At low flow rates of ~ 0.03 kg s−1, the pumping power is discardable, and the energy performance index reaches 3.1 × 105. The performance of the system is especially enhanced during days with mildly cold temperatures and partially cloudy skies, as well as when the indoor setpoint temperature is reduced. Besides, the integrated wall remarkably reverses the heat transfer direction and offsets thermal losses (up to ~ 21.2 W m−2) during nighttime hours, compared to a plain wall. The cost savings of the system are approximately 16.97 EUR m−2, with a payback period of 5.53 years. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF