Imperial College London

Dr Salvador Acha

Faculty of EngineeringDepartment of Chemical Engineering

Research Fellow



+44 (0)20 7594 3379salvador.acha Website CV




c410Roderic Hill BuildingSouth Kensington Campus






BibTex format

author = {Acha, Izquierdo S and Loh, C and Noye, S and Shah, N},
publisher = {ASHRAE},
title = {Retail Building Thermal Efficiency Improvement Through an Enhanced Re-Commissioning Framework},
url = {},
year = {2015}

RIS format (EndNote, RefMan)

AB - End-use energy efficiency is recognized as a predominant contributor to achieve UK carbon reduction target that is still far from reach today. Theopportunity in retail buildings is apparent, especially supermarkets that account for 4 MtCO2e of total UK carbon footprint. This paper outlinesan enhanced re-commissioning (Re-Cx) framework that aims to mitigate supermarkets with poor energy performance, known as “cold-stores”. Theframework delivers a holistic approach with four critical strategies – Identification, Monitoring, Rectification and Prevention in sustainingsupermarket thermal efficiency throughout its operational lifecycle. This includes a comprehensive store characterization to identify “cold-store”, keyperformance indicators (KPIs) proposal for supermarket thermal efficiency monitoring, a cost-effective fault indication flowchart development for“cold-store” rectification, and the introduction of a novel Re-Cx and maintenance integration approach to prevent “cold-store” in a sustainablemanner. A case study is carried out on 350 stores from one of the biggest UK supermarket chains. Seven “cold-stores” are identified from thecomprehensive store benchmarking and characterization analysis. These results are also validated through the proposed KPIs. Moreover, acomparison between EnergyStar Re-Cx strategies and the supermarket maintenance procedures found 80% of the Re-Cx measures could beintegrated into the maintenance activities. This ascertains the feasibility of the suggested integration approach. In a nutshell, this framework bringsa new perception to retail Re-Cx regime, which can be implemented to effectively identify, monitor, rectify and prevent “cold-stores”.
AU - Acha,Izquierdo S
AU - Loh,C
AU - Noye,S
AU - Shah,N
PY - 2015///
SN - 1088-8586
TI - Retail Building Thermal Efficiency Improvement Through an Enhanced Re-Commissioning Framework
UR -
ER -