**5. Conclusions**

The influence of hot water setting temperature on the operation and the performance of SASCHCS was analyzed in detail based on the data of the entire cooling period in subtropical Guangzhou. The corresponding conclusions are summarized as follows:


4. It was demonstrated that a 71.6 ◦C collector setting temperature with a 64.5 ◦C generator one was optimal for the annual operation by the global optimization. The corresponding peak annual specific energy saving of SASCHCS was 32.75 kWh/m2. In addition, the annual collector efficiencies, the COP of absorption and compression subsystems, were 0.39, 0.63, and 4.86, respectively, in the optimal case.

**Author Contributions:** J.Z. contributes to data analysis and writing. Z.L. contributes to conceptualization and methodology. H.C. contributes to formal analysis. Y.X. contributes to the validation. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work is supported by: (1) Natural Science Foundation of Guangdong Province under the contract No. 2018A030313310, (2) Guangzhou Municipal Science and Technology Project under the contract No. 201904010218, (3) State Key Laboratory of Compressor Technology under the contract No. SKL-YSJ201806, (4) Key Laboratory of Efficient and Clean Energy Utilization of Guangdong Higher Education Institutes under the contract No. KLB10004.

**Conflicts of Interest:** The authors declare no conflicts of interest.
