SUPERMARKET APPLICATION. CO_2 ALL-IN-ONE TRANSCRITICAL ENERGY PACK FOR HVACR INTEGRATION IN SMALL STORE. DATA ANALYSIS.

摘要

Today the trend for buildings in EU is getting closer to the n-ZEB (nearly - Zero Energy Building). Thisrnmeans that refrigeration is becoming, year after year, one of the most important and one of the lastrnthermal loads in food retail shops. Refrigeration systems are most usually standalone systems thatrnsometimes have secondary connections to other systems. These connections consist, in most cases, ofrnpassive heat recovery based on heat exchangers. This paper presents the results of an energy packrnconsisting of an all-in-one R744 trans-critical device for supermarket application actively producing onrndemand thermal power for heating, cooling and refrigeration. The energy pack consists of an R744 transcriticalrnsystem able to modify independently three pressure levels in order to satisfy the whole thermalrndemand of the store. The aim of the study is to understand how much the all-in-one solution helps tornachieve the efficient use of R744 for refrigeration in a small format food store. This paper analyzes arncollection of data coming from a real store installed in UK. The results of the analysis are coupling withrnthe results obtained with a full-size prototype running in a facility laboratory, in order to extend thernanalysis with different combinations of temperature, power and load displacement.