Helping our customers to achieve their environmental targets, such as improving plant efficiency, reducing energy and water usage and maintaining product quality, and hence avoiding waste, is central to our sustainability strategy and business model.
Improving our end users' sustainability by reducing energy use
Improving energy management and reducing CO2 emissions is a key sustainability driver for our customers. The application of many of our products, engineered solutions and services enables our end users to reduce their energy use and carbon emissions.
We estimate that a select range of Spirax Sarco energy management products sold during 2016 will reduce our end users’ CO2e emissions by 4.4 million tonnes annually. The methodology used to determine these savings has been independently assessed with the assistance of Ricardo-AEA Ltd. The methodology remains unchanged but is reviewed annually by Ricardo-AEA taking revised emission factors into account. The calculation is based on a selected range of energy saving products, for which we can quantify savings with reasonable accuracy. Many of our other products, such as pressure and temperature controls, will also provide CO2e savings but as these are not easily quantifiable they are excluded from our methodology.
Our comprehensive plant-wide energy audits and steam trap monitoring systems are also used by our customers to monitor and manage their energy consumption.
The design and unique action of Watson-Marlow’s positive displacement pumps can also help our customers to save energy. For example, our MasoSine pumps are designed to gently handle highly viscous products such as raw silicone gum, used in industrial applications. Alternative pump technologies require large electrical motors to handle viscous fluids, which results in a high demand on electrical power. MasoSine pumps, however, are unaffected by high viscosity and use smaller motors compared with other established technologies, requiring less energy to run.
Improving our end users' sustainability by reducing water consumption
Many of our products and solutions help our end users to reduce water consumption. For our steam customers, our products and services can reduce water consumption through improving the management of condensate and returning it to the boiler house; capturing and utilising flash steam, which would otherwise be lost to atmosphere; or improving the quality of boiler feed water, thus reducing the need for boiler blow-down.
Within the mining industry, the installation of a Bredel slurry pump from Watson-Marlow can reduce water consumption by as much as 70%. This typically equates to savings of over 900,000m3 of water for each pump installed.
Customer case study
Spirax Sarco Mexico saves Nestlé energy and reduces water consumption by 28,000m3 per year
When specialist engineers from Spirax Sarco audited the steam system at Nestlé’s instant coffee plant in Toluca, Mexico, they were asked to develop and install a solution to recover 100% of condensate from distiller bells and to increase steam system efficiency.
The audit found that condensate was being lost as a result of back pressure being imposed on the condensate line by a flash steam recovery vessel. Spirax Sarco installed an automatic pump trap to overcome the back pressure, enabling the existing flash vessel to function correctly. Flash steam, generated in the flash vessel, is now used to preheat water before it enters a newly installed Easiheat™ unit, which is producing hot water for the plant. The condensate from both the flash vessel and the Easiheat™ unit is now returned to the boiler house (saving energy, water, and water treatment chemicals) where it is used to generate steam.
The solution cost Nestlé £76,000 but is saving £67,000 per year. In addition, it is reducing energy consumption at the plant by 6,700 gigajoules per annum and is saving 147 tonnes of CO2 emissions each year. Furthermore, improved steam system efficiency has reduced water consumption by as much as 28,000m3 per year.
Mr Ricardo Morales, Energy Manager at Nestlé Mexico, explained, “We are making investments to increase our energy efficiency. Each year in Nestlé Mexico we have the objective of saving around 4% in the use of energy and water. The participation of Spirax Sarco is key to improving the energy efficiency of our company in matters relating to steam production and distribution, condensate recovery, heat exchange and delivering expert training to our staff”.
Customer case study
Twenty-one Bredel hose pumps installed in landmark sustainable energy project
During 2016, Dong Energy completed a landmark project to convert its coal fired power station in Studstrup, Denmark, to sustainable biomass. Twenty-one Bredel hose pumps from Watson-Marlow have been installed at the site, helping Dong Energy to supply green district heating to around 106,000 homes and green electricity, equivalent to the annual consumption of approximately 230,000 homes, to the Danish grid. The project is also expected to reduce the plant’s carbon emissions by 310,000 tonnes per year.
To generate green energy, the site combusts sustainably sourced wooden pellets. When burned the pellets produce alkaline gases. To counter this a fine coal ash, reclaimed from landfill depositories, is added to the pellets prior to combustion. Dosing the ash requires pumps that can handle the thick, abrasive slurry produced when the ash is mixed with water.
Bredel peristaltic hose pumps were selected after trials demonstrated their superior ability to overcome the challenges associated with pumping the high density, inhomogeneous and abrasive particles, compared to large double-acting hydraulic pumps. Engineers from Watson-Marlow worked closely with Dong Energy and the site contractor Eurocon to deliver an optimised engineered solution to extend hose life, reduce costs and deliver reliable pumping in this innovative and sustainable energy project.