Coupling night ventilative and active cooling to reduce energy use in supermarkets with high refrigeration loads

Night ventilation is used extensively as a low energy strategy to cool buildings in climates where night temperatures are suitable. It can be used for spaces utilising natural or mechanical ventilation systems as well as active refrigerant cooling. Most published work focuses on domestic and relatively simple in operation commercial buildings such as offices. This paper presents a study of the cooling benefits of night ventilation for frozen food supermarkets with high cooling demand.

Ventilative cooling and energy use in supermarkets

Supermarkets are a category of non-domestic buildings with high energy use because of their operation. Recent work indicates that by improvements to the energy delivery systems through which internal environmental conditions are maintained such as thermal properties of external envelope including airtightness, HVAC systems and lighting, substantial energy savings can be achieved. Work to date has focused on typical supermarkets while the present paper examines frozen food supermarkets which include more refrigeration cabinets and therefore result in higher energy use per sales floor area.


Supermarket is common in China because of its convenience and abundant merchandise. People insupermarket can be classified into two categories: clients and operators. This research measures thetemperature and relative humidity of four supermarkets to describe the indoor thermal environment,investigates the satisfactory degree of clients and operators on the indoor environment, and analysesthe reasons of dissatisfaction.

Survey and Analysis on Indoor Thermal Environment of the Marketplace

The object of this investigation is a marketplace in a cold winter and hot summer region. This survey provides some basic data for HAVC designing of marketplace and the improvement of existed HAVC system in cold winter and hot summer region, at the same time it is suggested:
1. Due to bad smell caused by fruit and vegetables, it is suitable for supermarket to adopt deterministic directional airflow.

Paying dividends.

Describes an energy efficient hypermarket built in South Wales. Describes energy conserving features, including CO2-controlled ventilation using an infra-red analyser. Briefly discusses problems of installing and calibrating the system.

Air tightness: Supermarkets and shopping malls.

Reports measurements of air leakage in several supermarkets and an enclosed shopping mall, all constructed between 1954 and 1979. All tests were conducted by using a large fan to depressurize the building. Gives graphs of leakage rates. Finds supermarkets are two to four times leakier than schools or high-rise office buildings.