Provides energy for an entire city: The Thassalia marine thermal energy project

The Thassalia seawater plant supplies sustainable energy for buildings with a 500,000 m² surface area. Find out why high-performance pumps from KSB make a major contribution to the project's success.

The Customer

The French ENGIE Group, based in Paris, is one of the world’s largest energy producers and energy service providers with over 150,000 employees in about 70 countries. Apart from conventional energy generation, the company also focuses on renewable energy sources such as wind power, hydropower and thermal energy.

The Project

For the population of coastal areas the ocean offers huge energy potentials – which can now, for the first time, be tapped into on a large scale, with KSB’s contribution: In October 2016, Thassalia, a 35 million euro marine thermal plant, was inaugurated in the port of Marseille. The plant harnesses the thermal energy provided by the Mediterranean, supplying sustainable energy for buildings with a 500,000 m² surface area in the new Eco-Cité Euroméditerranée, currently the largest urban renewal project in Southern Europe.

The Thassalia plant significantly contributes to the Eco-Cité Euroméditerranée meeting the French High Quality Environmental Standard for green building. The plant reduces greenhouse gas emissions by 70 %, power consumption by 40 % and water consumption by 65 %.

The Challenge

KSB was in charge of designing a network for hot and cold water for the entire Eco-Cité district – a highly demanding project, for many reasons:

  • Combined heating and cooling supply
  • Aggressive seawater as transfer fluid
  • Large total area of the Eco-Cité spanning 480 hectares
  • High efficiencies to ensure the lowest possible power consumption
  • Lowest possible noise emissions to protect the people living nearby
  • Fast on-site service for maintenance and repair ensuring smooth operation of the plant 24/7

The Solution

Seawater from a depth of seven metres is pumped to the thermal system by six high-performance pumps of the CPKN type. Each of these seawater pumps is fitted with a 160 kW variable speed motor. The total flow rate equals 1000 l/s. The aggressive nature of seawater that is heated up to 30 °C in the return system requires the seawater pumps to be well protected against corrosion. All parts in contact with water are therefore made of a special duplex stainless steel – a material developed by KSB called Noridur®. For the same reason, the discs of the ISORIA butterfly valves installed are coated with Halar.

CPKN standardised chemical pump used as seawater pump

Eight standardised chemical pumps of the MegaCPK type with motor ratings between 160 and 355 kW are installed in the hot water network and separate cooling water network of the ÉcoCité's buildings.

The valves with sizes of up to DN 700 fulfil shut-off and control functions during seawater intake. They are actuated by robust pneumatic or manual actuators. The seawater, which ranges in temperature from about 14 °C in winter to 22 °C in summer, supplies the heat exchangers connected to the thermo-refrigeration pumps. It provides heating when the water is cold and cooling when it is warm. Heating or cooling is then distributed to the Eco-Cité buildings via a hot water network of 60 °C and a separate cooling water network of 5 °C. 

The network with a length of three kilometres requires high-performance pumps for both circuits. The two circuits are each fitted with four powerful standardised chemical pumps of the MegaCPK type. Each of these pumps can achieve heads of between 110 m and 120 m of water. The motor ratings range from 160 kW to 355 kW with an efficiency of up to 84 % at speeds of 1500 rpm to 1750 rpm. 

The valves with sizes of up to DN 700 fulfil shut-off and control functions during seawater intake. They are actuated by robust pneumatic or manual actuators. The seawater, which ranges in temperature from about 14 °C in winter to 22 °C in summer, supplies the heat exchangers connected to the thermo-refrigeration pumps. It provides heating when the water is cold and cooling when it is warm. Heating or cooling is then distributed to the Eco-Cité buildings via a hot water network of 60 °C and a separate cooling water network of 5 °C. 

The network with a length of three kilometres requires high-performance pumps for both circuits. The two circuits are each fitted with four powerful standardised chemical pumps of the MegaCPK type. Each of these pumps can achieve heads of between 110 m and 120 m of water. The motor ratings range from 160 kW to 355 kW with an efficiency of up to 84 % at speeds of 1500 rpm to 1750 rpm. 

Data I Facts I Figures

ENGIE SA

Founded in: 1858

Employees: 153.090 (Stand 2016)

Sales revenue66,6 Mrd. Euro (2016)

Industry: energy supply

Thassalia project data

  • Supply of the area to be supplied with hot and cold water:
    480 hectares with a building surface area of 500,000 m2

KSB type series used in this project

  • Thermal plant:
    6 KSB CPKN pumps as seawater pumps with 160 kW variable speed motors, wetted parts made of corrision-resistant Noridur®, 6 ISORIA butterfly valves with Halar-coated discs,
    Fluid handled: seawater at a temperature of up to 30 °C
  • Supply network:
    8 MegaCPK standardised chemical pumps with motor ratings of 160 to 355 kW (efficiency up to 84 % at speeds between 1500 rpm and 1750 rpm

Comissioned: 2016

Products used

CPKN

CPKN

Horizontal radially split volute casing pump in back pull-out design, with radial impeller, single-entry, single-stage, to ISO 2858 / ISO 5199. Also available as a variant with "wet" shaft, conical seal chamber and/or semi-open impeller. ATEX-compliant version available.

MegaCPK

MegaCPK

Horizontal radially split volute casing pump in back pull-out design, with radial impeller, single-entry, single-stage, to DIN EN ISO 5199, dimensions to DIN EN ISO 2858, complemented by nominal diameters DN25 and ≥DN200, in large range of material and seal variants; also available as a variant with "wet" shaft and conical seal chamber. ATEX-compliant version available.

KSB – endüstri armatürlerinin ve pompalarının dünya lideri üreticisi

KSB, 1871 yılında Frankenthal'da (Almanya) kurulmuştur ve 100 yılı aşkın süredir pompa ve endüstriyel armatürlerin lider üreticilerinden biridir. Dünya çapında 15.500'den fazla çalışanı bulunan KSB; kendine ait satış şirketleri, üretim tesisleri ve servis işletmeleriyle, çeşitli uygulamalar için özel pompalar geliştirir ve üretir.

Uzman pompa üreticisinin ürün yelpazesi; yapı ve endüstri teknolojisi, su taşıma ile atık su temizliği ve elektrik santrali süreçlerinde kullanılır. Yenilikçi araştırma ve geliştirme işlemleriyle KSB, çeşitli müşteri taleplerini karşılayabilmektedir. Saygın pompa üreticisi olarak KSB, uzun yıllara dayanan tecrübelere ve teknik bilgilere sahiptir.

Pompa üreticisi KSB: sisteminiz için en iyi çözüm
KSB'nin endüstriyel pompa ve armatürleri, geniş bir uygulama aralığı için uygundur ve enerji açısından oldukça verimlidir. Yenilikçi teknolojilerle kendilerini kanıtlayan ürünler, uzun yıllardır sistemlere başarılı bir şekilde takılmaktadır (bunların arasında Etanorm su pompası da bulunur). 1,5 milyondan fazla satılmış agregayla Etanorm, dünya çapında en başarılı su pompaları arasında bulunur. KSB'nin Yedek parçalar ve servis performansları, KSB endüstri pompalarının ve endüstri armatürlerinin işletim güvenliğini sağlar. Hidrolik, malzeme teknolojisi ve otomasyon pompa üreticisi KSB'nin teknolojik güçleridir ve yüksek performanslı pompalarının başarı sırrı ise bunlara dayanır.

En başından itibaren yetkili servis
Çok sayıda üretim tesisiyle pompa üreticisi KSB, müşteriye yakınlığı ve birinci sınıf servisi garantileyebiliyor. Kapsamlı tecrübe birikimine sahip sertifikalı uzmanlar mükemmel kalite sağlarlar. KSB Service; pompalarınızın, armatürlerinizin ve tüm sistemlerinizin bulunduğu konumda işletime alınmasını, muayenesini, bakımını ve onarımını üstlenir. KSB ayrıca hızlı yedek parça teslimini de sağlar. Böylece doğrudan pompa üreticinizden en iyi servisi elde etmiş olursunuz.