Annex 26

Advanced Supermarket Refrigeration/Heat Recovery Systems

Introduction

This Annex will investigate candidate advanced system design approaches to determine their potential to reduce refrigerant usage and energy consumption for both refrigeration and heating/air conditioning in supermarkets. Advanced supermarket refrigeration system concepts to be considered include, but not limited to the following:

• secondary loop systems;
• distributed compressor systems;
• self-contained display cases.

Start date: 1 April 1999
End date: 30 September 2003

Objectives

The objective of this Annex is to demonstrate and document the benefits of advanced systems design for food refrigeration and space heating and cooling for retail foodstores (supermarkets). A specific goal is to identify advanced system design options to reduce the total equivalent warming impact (TEWI) of supermarkets.

Operating Agent and Participating Countries

The designated Operating Agent is the US Department of Energy, acting through Oak Ridge National Laboratory on behalf of the USA.

Participating Countries: Canada, Denmark, Sweden, U.K. and USA.

Activities

The following describes some of the task-sharing activities to be carried out under this Annex:

Task I:
Analyse candidate advanced supermarket refrigeration systems and compare them to state-of-the-art systems; and
determine "best" or most appropriate method(s) to integrate HVAC systems with refrigeration systems to maximise waste heat recovery;

Task 2:
Conduct one or more field demonstrations of advanced systems in actual stores (in collaboration with system manufacturers, participating stores and local utilities) to compare with conventional store systems now in common use or alternatively; and
prepare case studies documenting ongoing or previous demonstrations being conducted by various agencies within each country.

Products

The Annex will yield comparative analyses and field tests or case studies documenting the performance of advanced and cost efficient supermarket refrigeration/ heat recovery options and their potential energy savings and TEWI reductions. A final report will be published documenting the findings of these analyses and field tests or case studies, and proceedings of the workshops will be published.