Energy saving effect of hotel central air conditioning systems with energy efficiency management system

An architecture energy efficiency tracking, control and management system was proposed for energy conservation of the central air conditioning system of a star hotel. And its energy-saving effect was detected with three departments participated in, Shandong Institute of Metrology, Shandong Energy Test Centre, and Shandong Institute of Supervision & Inspection on Product Quality, to assure the authenticity and reliability. With the system, the power saving rate decreased in July and August because of steady load and efficient equipment, which shows that energy efficiency management system changes with the outside temperature and energy saving control system can track changes with load automatically and adjust dynamically. Real-time detection shows average power saving rate is 41.05% in summer (May, June, July and August are summer condition) and 46.8% in winter (December and January are winter condition). The following aspects are discussed, first, the unreasonable original design of equipment matching, second, the improvement of equipment efficiency under part-load condition, third, the energy saving potential of dynamic management and operation system, and last, the necessity of energy efficiency management system to be modularized, refined and intelligentized.