Experimental study on thermal comfort and ergonomics of personalized environmental control systems linked to air conditioning in office scenarios

Taking the university student office scenario as an example, this study introduces the personalized environmental control system (PECS) in multi-person office scenarios, formulates different air conditioning linkage control strategies, and conducts personnel thermal comfort and ergonomics experiments using on-site research methods. A total of 80 person-times of ergonomics tests and 980 thermal comfort questionnaires are completed, and key environmental parameters such as temperature, humidity, and air velocity are recorded. The results show that dynamically adjusting the air conditioning set temperature based on PECS commands can widen the comfort temperature range by 2 to 3 ℃ under the premise of satisfying thermal comfort of multiple people. Compared with the steady state air conditioning environment, this linkage control method can improve the psychomotor vigilance task (PVT) score by about 8% and the add-subtract serial task (ASST) score by about 19%. Compared with independent air conditioning control, the energy-saving effect of the air conditioning and PECS linkage control is more significant, and the energy-saving rate under the 3-hour linkage control can be as high as 49.6%.