Application of an ice thermal energy storage system as ways of energy management in a multi-functional building

Abstract

Peak-hour tariff typically troubles commercial office buildings in hot and humid climates where cooling demands are high during summer. Because the local power company rate structure strongly favors the practice of load shift and conversely penalizes peak load demand during peak hours, a multi-functional office building in Taipei seeks to reduce its cooling cost by ways of an ice thermal energy storage system in which harvested ice is stored during cheaper off-peak hours and thawing the storage medium during peak hours. The system uses partial storage approach to satisfy off-peak cooling demand while peak-hour cooling burden is relieved by chilled water built the previous night. Two screw chillers would be integrated with each other for the implementation to allow feeding chill water to the air-handler coils while producing ice for storage at the same time. The refrigeration cycle of water chilling operates under two modes, the ice mode for thermal storage, and the chill water mode for instantaneous air cooling. Super-cooled air from melted icewater makes humidity levels to be lower than conditioned with conventional systems, as well as load shift incentives. Cool air is introduced to variable air volume terminal boxes and is mixed with induced plenum air to bypass any reheat, yielding additional saving. V C 2015 AIP Publishing LLC.

Seaside Renewable Energy Resources Literature Review

“…There are three kinds of TES systems as stated by [63]. (1) The sensible thermal storage system (STES) which is based on storing thermal energy by heating or cooling a liquid or solid medium (e.g., in our case, ice thermal storage system for cooling [64]). The compressed air energy storage system [65] and ATES (aquifer thermal energy system) for heat or cool thermal storage in aquifers) [66].…”

“…Ice thermal storage tank for cooling [64]: This is a system that can be used combined with other parts in plants for cooling (see Figure 1 in [64]). Built-in ice storage is ideal for IST (ice storage tank).…”

“…IST-ice storage tank: In Wu et al [64] paper, the authors suggest using three combined IST storages along with other parts. The combined central plant systems are one air handling unit, one heat exchanger, one chiller plant, different pipe configurations and four pumps for circulating along with these three IST storages.…”

An optimization strategy for enhancing energy consumption performance in digital currency miner's building

“…Using the Demand Response Quick Assessment Tool (DRQAT) model, they concluded that ice storage could reduce the buildings' electricity consumption by about 1500 kWh at peak times [29]. Moreover, Wu et al, modelled ice storage in a building and concluded that using this technology reduces costs by 37% per year and reduces peak energy consumption by 800 kWh [30]. Lee et al studied the effect of the ice storage system by using a building simulation model and concluded that peak energy consumption is reduced by 30% [31].…”