本文评估了在混合式冷水机组中使用接近最优的电力需求限制控制策略的成本节约潜力。控制策略包括电能和燃气能、电力需求和冷却器维护成本的影响。根据启发式策略为每个月设置需求约束，并在整个月的每个决策间隔（例如，每五分钟）为冷却塔和冷却器控制应用试图满足需求约束的能源/维护成本优化策略。使用模拟工具对该策略进行评估，该工具可预测与混合动力发电厂相关的公用事业成本。在各种条件下，评估了与混合冷却装置采用需求限制控制相关的年度成本节约。 与仅仅基于最小化能源成本的策略相比，成本最多可以降低50%。需求限制控制的成本节约通常随着需求与总公用事业成本之比的增加而增加。除了取决于公用事业费率外，需求与总成本的比率还取决于负荷状况。总的来说，使用具有需求限制控制的混合冷却设备对占用时间较短、需求费用较高的建筑更为有利。占用时间较短的建筑的峰值负荷与综合负荷的比率较高。单位:投资:ASHRAE交易，第113卷，pt。2.

This paper evaluates the potential for cost savings associated with the use of a near-optimal control strategy for electrical demand limiting in hybrid chiller plants. The control strategy includes the effects of electrical and gas energy, electrical demand, and chiller maintenance costs. A demand constraint is set for each month based upon a heuristic strategy, and an energy/maintenance cost optimal strategy that attempts to satisfy the demand constraint is applied for cooling tower and chiller control at each decision interval (e.g., every five minutes) throughout the month. Evaluation of the strategy was performed using a simulation tool that predicts the utility costs associated with hybrid plants. Annual cost savings associated with employing demand-limiting control for hybrid cooling plants were evaluated for a wide range of conditions. Costs can be reduced by up to 50% compared to a strategy that is just based on minimizing energy costs. The cost savings for demand-limiting control generally increase with increasing ratio of demand to total utility costs. In addition to depending on utility rates, the ratio of demand to total costs depends on the load profile. In general, the use of hybrid cooling plants with demand-limiting control is more beneficial for buildings with shorter occupancy periods having high demand charges. Buildings with shorter occupancy have a higher ratio of peak load to integrated load.Units: I-P