TABLE OF CONTENTS

Aquaeco 2
by SANDEN: The first CO 2
water heater tailored to European needs
Introduction
Reducing CO 2
emissions is a clear leitmotiv for anyone concerned about the planet.
Concrete targets have now been adopted by the European Union to promote green
technologies and reduce energy consumption through the famous “3 x 20”. Against
this backdrop, SANDEN has decided to use core know-how in heating and cooling
technologies: in order to reach the target for primary energy consumption in single
family dwellings of ~50 kWhpe/m² year, investigating the development of better
Domestic Hot Water (DHW) systems.
About the System
About the company
The SANDEN Corporation, born in 1943, currently
located in 23 countries, develops and produces full
automotive AC loops, refrigeration retail systems,
vending machines and thermal comfort appliances
for buildings. This full products range is recognized
worldwide for its high quality and reliability, as well as
related services. Aquaeco2 is developed and produced
by SANDEN Manufacturing Europe in France.
More information at:
www.sanden-europe.fr
Contact Information
Sylvain Gillaux
info@sanden-europe.fr
SANDEN has been providing so called “Eco Cute” solutions to the Japanese market for
several years. However, importing this technology adapted to the specific needs of
Nippon end users does not conform to its philosophy: the technology has to fit to the
market, not other way round. This is the reason why a complete survey of the market
needs has been conducted in order to define the design criteria that would lead to the
best performances before starting any development.
The conclusion of this study was that CO 2
is the best possible refrigerant for reaching top
level seasonal performances (seasonal coefficient of performance “sCOP” or seasonal
performance factor “SPF”). This is due to a 100% thermodynamic mode over the full
range of temperature, without any electrical back-up, and to CO 2
thermophysical and
transport properties. By combining those performances with its truly green identity,
CO 2
is clearly overtaking classically utilized HFC refrigerants, such as R134a.
In order to confirm in situ those specifications, SANDEN decided to conduct a field
testing campaign of 10 products in one of the coldest area in France. A two and a
half year development was necessary to reach the final product design, fulfilling all
requirements for end users as well as giving to the European market a solution for
producing really “green” domestic hot water.
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