Open absorption heat pump (OAHP) system is more viable option to recover waste heat from moist gas as compared to the traditional condensation methods. This promising technology has great potential for latent heat recovery from moist gas, drying process in paper and other industrial heating applications. This study presents the process modelling and comparative analysis of OAHP system in Aspen Plus using two different solutions by adopting part regeneration technique. The promising potassium formate-water (HCOOK/H₂O) which has lower causticity, lower costs and better crystallization characteristics is used as an alternative to the caustic lithium bromide-water (LiBr/H₂O) solution in this study. Process model of the system is established in Aspen Plus and, the properties validity is confirmed with published experimental and Engineering Equation Solver (EES) library data. A detailed comparative parametric study is carried out to evaluate the effect of influencing parameters on coefficient of performance (COP), water recovery (φ) and heat recovery (ζ) efficiencies. The performance of OAHP system is found to be very similar using different concentrations as 2.13 COP value for 50% LiBr/H₂O and 2.19 for 70% HCOOK/H₂O solution over design conditions. Similarly, φ is found to be 0.701, 0.688 while ζ as 0.716 and 0.705 for both the absorbents. Moreover, the system’s operational concentration range is 45-61.3% for LiBr/H₂O and 55-82.1% for HCOOK/H₂O at 135 °C regeneration heat input. Potassium formate solution having quite similar properties to the aqueous lithium bromide is also confirmed to have similar performance trends using 50% and 70% concentrations.

与传统的冷凝方法相比，开放式吸收式热泵 (OAHP) 系统是从潮湿气体中回收废热的更可行的选择。这种有前途的技术在从潮湿气体中回收潜热、纸张干燥过程和其他工业加热应用方面具有巨大的潜力。本研究通过采用零件再生技术，使用两种不同的解决方案，对 Aspen Plus 中的 OAHP 系统进行了过程建模和比较分析。有前景的甲酸钾-水 (HCOOK/H ₂ O) 具有更低的腐蚀性、更低的成本和更好的结晶特性，可用作苛性溴化锂-水 (LiBr/H ₂O) 本研究中的解决方案。在 Aspen Plus 中建立了系统的过程模型，并通过已发布的实验和工程方程求解器 (EES) 库数据确认了性能有效性。进行了详细的比较参数研究，以评估影响参数对性能系数 (COP)、水回收率 (φ) 和热回收率 (ζ) 效率的影响。OAHP 系统的性能非常相似，使用不同浓度时，50% LiBr/H ₂ O 的COP 值为2.13，70% HCOOK/H ₂ O 溶液的COP 值在设计条件下为 2.19 。类似地，对于两种吸收剂，发现 φ 为 0.701、0.688，而 ζ 为 0.716 和 0.705。此外，LiBr/H ₂系统的操作浓度范围为 45-61.3%O 和 55-82.1% 的 HCOOK/H ₂ O 在 135 °C 再生热输入下。使用 50% 和 70% 的浓度，与溴化锂水溶液具有非常相似的性质的甲酸钾溶液也被证实具有相似的性能趋势。