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A novel compression-assisted double absorption energy storage heat transformer with high temperature lift
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-23 , DOI: 10.1016/j.enbuild.2025.115368
Cun Wang, Yuehong Bi
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-23 , DOI: 10.1016/j.enbuild.2025.115368
Cun Wang, Yuehong Bi
Absorption energy storage heat transformer (ESHT) is a type of absorption energy storage system designed to achieve temperature lift. The system addresses energy supply–demand mismatches and expands potential applications for low-grade energy. This paper proposes a novel compression-assisted double absorption energy storage heat transformer (CDAESHT) to improve the system performance. The dynamic characteristics of four operational modes with/without compression are comparatively analyzed. The performance of the CDAESHT and existing ESHTs is studied and compared. Results indicate that the CDAESHT achieves the maximum temperature lift of 95 °C while demonstrating superior performance over existing ESHTs. Compared to the conventional ESHT with a maximum lift of 37 °C, the energy storage density is improved from 15.61 kWh/m3 to 38.49 kWh/m3 , the exergy efficiency is enhanced from 0.21 to 0.24, and the discharging time is increased from 66 min to 122 min. Moreover, the system performance exhibits excellent stability as the charging temperature increases. The proposed system demonstrates favorable economic performance and a lower environmental impact compared to gas and electric boilers. CO2 emissions are reduced by 11,022.77 kg (34.81 %) and 61,277.27 kg (74.80 %), respectively. This study can offer valuable insights for the advanced ESHTs.
中文翻译:
一种新型高温升程压缩辅助双吸收储能换热器
吸收储能热变压器 (ESHT) 是一种旨在实现温度提升的吸收储能系统。该系统解决了能源供需错配问题,并扩大了低品位能源的潜在应用。该文提出了一种新型压缩辅助双吸收储能热变压器(CDAESHT)来提高系统性能。比较分析了有压缩/无压缩的 4 种操作模式的动态特性。研究和比较了 CDAESHT 和现有 ESHT 的性能。结果表明,CDAESHT 实现了 95 °C 的最大升温,同时表现出优于现有 ESHT 的性能。与最大扬程为 37 °C 的传统 ESHT 相比,储能密度从 15.61 kWh/m3 提高到 38.49 kWh/m3,用能效率从 0.21 提高到 0.24,放电时间从 66 min 增加到 122 min。此外,随着充电温度的升高,系统性能表现出优异的稳定性。与燃气和电锅炉相比,拟议的系统表现出良好的经济性能和较低的环境影响。二氧化碳排放量分别减少了 11,022.77 公斤 (34.81%) 和 61,277.27 公斤 (74.80%)。本研究可为高级 ESHTs 提供有价值的见解。
更新日期:2025-01-23
中文翻译:
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一种新型高温升程压缩辅助双吸收储能换热器
吸收储能热变压器 (ESHT) 是一种旨在实现温度提升的吸收储能系统。该系统解决了能源供需错配问题,并扩大了低品位能源的潜在应用。该文提出了一种新型压缩辅助双吸收储能热变压器(CDAESHT)来提高系统性能。比较分析了有压缩/无压缩的 4 种操作模式的动态特性。研究和比较了 CDAESHT 和现有 ESHT 的性能。结果表明,CDAESHT 实现了 95 °C 的最大升温,同时表现出优于现有 ESHT 的性能。与最大扬程为 37 °C 的传统 ESHT 相比,储能密度从 15.61 kWh/m3 提高到 38.49 kWh/m3,用能效率从 0.21 提高到 0.24,放电时间从 66 min 增加到 122 min。此外,随着充电温度的升高,系统性能表现出优异的稳定性。与燃气和电锅炉相比,拟议的系统表现出良好的经济性能和较低的环境影响。二氧化碳排放量分别减少了 11,022.77 公斤 (34.81%) 和 61,277.27 公斤 (74.80%)。本研究可为高级 ESHTs 提供有价值的见解。