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What should we do for the flagship store in order to launch the ultimate eco-friendly supermarket?Masayoshi Togawa,CONSUMERS CO-OPERATIVE SAPPORO

Challenges for customers

Need to halve CO2 emissions by specially planned construction and operation of an ultimate eco-friendly supermarket

CO-OP SAPPORO, a consumer cooperative with a total of over 1360,000 members, has boosted its environmental activities since 2008 and has promoted a wide range of efforts, including waste reduction and recycling.
As part of these efforts, the cooperative has promoted a new store development project, setting as their target the halving of CO2 emissions by focusing on specially-planned construction and operation of the store.
The organization engaged in joint research with the Muroran Institute of Technology. The completed store utilizes the energy conservation technology developed through research and the use of solar energy and the adoption of laminated larch wood produced in Hokkaido. One of the challenges in this project was to reduce the power consumption of refrigeration and lighting equipment without inconveniencing customers.

The Muroran Institute of Technology and CO-OP SAPPORO have conducted joint research and planning in order to reduce CO2 emission at stores in half. One of the tasks discovered was to conserve the energy consumed by equipment. Panasonic has responded to this.

The Muroran Institute of Technology and CO-OP SAPPORO have conducted joint research and planning in order to reduce CO2 emission at stores in half. One of the tasks discovered was to conserve the energy consumed by equipment. Panasonic has responded to this.

Initiatives

Conserving energy with equipment alone isnít enough. Whatís next?

Placing the right type of lighting in the right place, can save energy. At the CO-OP SAPPORO Nishimiyanosawa store, we have introduced eco-friendly lighting on the shopping floor, LED downlights under the eaves, and LED lighting above cash register. We have installed illumination sensors on the ceiling in order to automatically control brightness according to brightness outside. Moreover, we have adopted CFC-free freezer showcases that reduce power consumption by approximately 10% compared to conventional freezers using HCFC refrigerant. Equipment of high energy-saving efficiency has been introduced throughout the store. Additionally, in an effort to achieve the ultimate in eco-friendliness, we have pursued more advanced ideas for down the road.

LED base light,Freezer showcase,store integration controller
LED base light for light control above the checkout/service counters

LED base light for light control above the checkout/service counters

CFC-free freezer showcase: Sliding covers prevent cool air from escaping, contributing to energy conservation

CFC-free freezer showcase: Sliding covers prevent cool air from escaping, contributing to energy conservation

Effects

Achieving approximately 40%* energy savings

Light leaked from showcases is also perceived by customers as brightness. For that reason, we have set the goal of "dramatically reducing wasted light by controlling and coordinating lighting equipment and showcase lighting, and allowing showcases to change temperatures according to the outside air temperature and the temperature inside the store, thereby achieving further energy conservation." We proposed a control system that linked lighting and showcases, by making use of the know-how available at Panasonic's test store. Careful control has led to a reduction in power consumption of approximately 40%*.

* Based on the comparison of power consumption <unit consumption calculated by dividing total electricity consumption of the store (Wh/day) by floor space (m2) per hour (h)> with a CO-OP SAPPORO store having conventional equipment (Engaru Minami Shop).

Integration of lighting and refrigeration systems: Store lighting and showcase lighting are linked and optimized according to the brightness of outside light and the time of day.

Integration of lighting and refrigeration systems: Store lighting and showcase lighting are linked and optimized according to the brightness of outside light and the time of day.

Light from outside is used during the day, lowering the brightness level.

Light from outside is used during the day, lowering the brightness level.

Saving power without stress, using [Feu] to evaluate brightness level

Even if energy conservation is achieved, it is meaningless if sales drop because of insufficient brightness on the shopping floor. Is the store bright enough that fresh foods look fresher than they are and lure customers to pick them up? Is the brightness appropriate for elderly people? We have thoroughly verified these matters, not just based on luminance but by using "Feu," Panasonic's original brightness-level index. Moreover, we asked customers to cooperate in a sensorial evaluation. This is how an eco-friendly supermarket, designed from the customer's viewpoint, was created.

[Feu] simulation using computer graphics: The results of brightness simulations are visualized as CG and Feu values, and the finished images can be shared.

"Feu" simulation using computer graphics: The results of brightness simulations are visualized as CG and Feu values, and the finished images can be shared.

Lighting control according to the time of the day/number of customers Opening time to sunset (Illumination by ceiling lamps: Approx. 900 lx; Showcase lighting control: Approx. 80%)Busy hours: Products are highlighted in order to attract customers. Sunset to 20:00 (Illumination by ceiling lamps: Approx. 810 lx; Showcase lighting control: Approx. 110%)Slow hours: Intensity of illumination is lowered according to the brightness outside. 8 p.m. to closing time (Illumination by ceiling lamps: Approx. 810 lx; Showcase lighting control: Approx. 80%)

Future vision

Expanding energy management from the model store to all stores

Various tasks remain for Panasonic to implement in the next step, including the creation of a more pleasant shopping floor by changing the color temperature of lighting in each zone and visualizing excess light in detail. This task will be accomplished by measuring energy consumption by each piece of equipment. We have proposed wireless systems for transmitting data from various sensors, as well as systems using a cloud service that allows energy management from remote locations. Our goal is to offer even more eco-conscious solutions by spreading energy management to all 111 CO-OP SAPPORO stores.

The color temperature of light influences the degree of warmth and coolness, thus determining the atmosphere of the physical space.The higher the color temperature is, the cooler the space seems. The lower the color temperature is, the warmer the space seems.

The color temperature of light influences the degree of warmth and coolness, thus determining the atmosphere of the physical space.The higher the color temperature is, the cooler the space seems. The lower the color temperature is, the warmer the space seems.

Further development

Pursuing further power-savings and food safety through a remote monitoring system

Panasonic's 24/7 remote monitoring system makes it possible to monitor not only electric power consumption but also the temperatures and humidity of refrigeration equipment and store interior. Additionally, it logs historical data. This allows us to identify electricity waste and enhance product quality controls. Power-savings and food safety are both achieved at the same time. Furthermore, we offer sensors, such as CO2 sensors that help determine the number of people in the store based on their breathing, illumination sensors and thermo sensors. And, by providing devices for data confirmation, such as PCs, monitors and smartphones, we can build the entire system.

*Products shown here may not be available depending on the country or region.

terminology
Feu

This is a new lighting index that quantifies the brightness that people sense in a space. Currently, the lux, a unit created 120 years ago, is used as the standard measure of lighting brightness. It indicates the brightness of illuminated plain surfaces. In general, it expresses the brightness of horizontal surfaces such as floors or desks. However, when we view a space, we not only look at the floor but also the ceiling or walls. The Feu is an index that quantifies the brightness that we sense in a space by comprehensively assessing the effect of the light that illuminates the walls or the light reflected from the floor.

Color temperature

Color temperature does not refer to the temperature of the light source but quantifies the color shade of the light. Kelvin (K) is used to indicate the color shade. The lower the color temperature, the redder or warmer the color, and the higher the color temperature, the bluer or colder. The color temperature of daylight on sunny days is 5,500 - 6,000 K and that of incandescent bulbs is around 2,800 K.

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