METHOD FOR CONTROLLING AN INTEGRATED COOLING AND HEATING FACILITY

摘要

The invention describes energy cost saving potentials in a food retail system in context with a smart grid system utilising thermal storage and heat recovery technology. The invention is based on case examples and theoretical studies to describe the technology advantages. To obtain the cost optimisation in complex refrigeration systems, a method for minimisation of cost is described.

主权项

1. A method for controlling an integrated cooling and heating facility comprising a vapour compression system with two or more heat exchangers, each arranged for providing cooling or heating, the vapour compression system being connected to an electrical energy grid being external to the vapour compression system and also being connected to a thermal energy grid being external to the vapour compression system, the method comprising the steps of:
providing a monetary cost function for operating the integrated cooling and heating facility, said monetary cost function establishing monetary energy costs and monetary energy revenues of operating the vapour compression system,
said monetary energy costs including monetary expenses for electrical energy received from the external electrical grid and consumed by the vapour compression system, andsaid monetary energy costs also including monetary expenses for thermal energy not provided by the vapour compression system and consumed at a location of the integrated cooling and heating facility andsaid monetary energy revenue including monetary revenues for thermal energy produced by the vapour compression system and provided to an external thermal grid at, or outside, the location of the integrated cooling and heating facility, and operating the vapour compression system in such a manner that the monetary energy costs established by the monetary cost function are minimised.