Economic analysis of solar energy storage heating

How efficient is a solar district heating system with large-scale heat storage?

Analyze a solar district heating system with large-scale heat storage. Efficient control mechanisms for heat pump and heat storage are identified. A system performance coefficient of 2.9 and a renewable energy fraction of 77 %. A system payback cycle of 12 years and a carbon neutrality factor of 0.92.

Can solar energy be used for space heating?

Then, the stored heat is later discharged to meet the space heating demands of the heating season. Currently, many solar seasonal storage methods have already been proposed, such as the borehole thermal energy system , hot water thermal storage , water gravel pit storage , and so on.

What is the exergy performance of solar seasonal storage?

Hence, the average system exergy ef ciency fi in the whole year (i.e. hex,sys) is 7.93%. Some researchers have also made the investigation of exergy performance of the solar seasonal storage methods, such as H. Ozturk et al. uses a soil packed-bed solar seasonal heat storage.

Can solar thermal energy storage replace air-source heat pump?

This study evaluates the techno-economics of replacing an air-source heat pump (ASHP) system with a solar seasonal thermal energy storage (STES) system for space heating in Hangzhou, China. Three heating systems, solar STES, ASHP, and ASHP with short-term storage of solar energy, are developed using TRNSYS for a house with 240 m 2 of floor area.

Why is heat storage important in smart energy systems?

Heat storage in smart energy systems can facilitate the utilization of multiple renewable energy sources, integrate waste heat and cool, and balance the electrical network . The 5th generation district heating (DH) also highlights the importance of heat storage .

How efficient is a solar energy system?

The results show an increase in solar collector efficiency to 41 %, thermal storage efficiency to 89 %, and a coefficient of performance to 1.74 for the absorption heat pump. This integration increases the system’s coefficient of performance dramatically to 2.9, with a renewable energy percentage of 77 %.