Abstract
This work deals with the operation, modeling, simulation, and cost evaluation of two different cold storage systems for a single-family house in Italy, that differ from one another on the cold storage material. The two materials used to perform the numerical simulations of the cold storage systems are represented by cold water and a phase change material (PCM), and the numerical simulations have been realized by means of numerical codes written in Matlab environment. The main finding of the present work is represented by the fact that, for the considered user characteristics, and under the Italian electricity tariff policy, the use of a proper designed cold storage system characterized by an effective operation strategy could represent a viable solution from an economical point of view.
Highlights
The adoption of thermal energy storage in air conditioning systems permits the shifting of the electric demand/electric rate fully or partially from on-peak hours to off-peak ones
This work relies on a novel approach for the design of refrigeration systems with cold storage for single-family houses in Italy. This approach consists of two stages: the first one, that in the following is referred to as pre-design, relies on the implementation of an original operation strategy for the refrigeration system based on partial storage, and aims to perform the dimensioning of the cold storage system and a first dimensioning of the chiller; in the second one, the results of the pre-design are used to set up the numerical simulation of the cold storage system, whose results are used to fix the final size of the chiller
The two materials used to perform the numerical simulations of the cold storage systems are represented by cold water and a phase change material (PCM), and the numerical simulations have been realized by means of numerical codes written in Matlab environment
Summary
The adoption of thermal energy storage in air conditioning systems permits the shifting of the electric demand/electric rate fully or partially from on-peak hours to off-peak ones. This approach consists of two stages: the first one, that in the following is referred to as pre-design, relies on the implementation of an original operation strategy for the refrigeration system based on partial storage, and aims to perform the dimensioning of the cold storage system and a first dimensioning of the chiller; in the second one, the results of the pre-design are used to set up the numerical simulation of the cold storage system, whose results are used to fix the final size of the chiller. The results of pre-design, of simulations, and of an economic analysis are presented and discussed
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