Numerous pharmaceutical workshops require low humidity environments with a supply air humidity ratio below 7 or 5 g/kg,and the conventional condensing dehumidification method powered by 7℃ chilled water cannot fulfill the dehumidification mission.The desiccant-wheel based dehumidification system is usually adopted to meet the demand.However,the required high-temperature heating source limits the system energy performance.Although liquid-desiccant based dehumidification system is feasible to utilize the low-grade cooling and heating sources,technoeconomic performance of the liquid-desiccant system in the pharmaceutical environments has not been fully investigated in previous studies.To address the gap,on-site measurements are conducted to reveal the feasibility of the liquid-desiccant system applied in a pharmaceutical factory.The results indicate that the regeneration temperature can be reduced from over 100℃ to below 50℃ by the liquid-desiccant device,and an energy saving rate of 15%~45%can be achieved when the supply air is dehumidified to around 6 g/kg.The carbon emission reduction rate can reach 20.7%in the baseline scenario.It is anticipated that this study could provide reference for decarbonization in pharmaceutical industry sector.
heating,ventilation,and air-conditioningliquid desiccant dehumidificationpharmaceutical factorybuilding energy efficiencycarbon emission reduction