Marriott Hotels embrace CHP

The group is underpinning its commitment to low-carbon energy generation in partnership with utilities and energy management services provider Dalkia.

A global leader in hospitality, Marriott International runs nearly 3,700 properties in 73 countries and territories worldwide. With the aim to build greener hotels, the hotel group has established energy and environmental action plans that help its properties achieve higher energy efficiency levels and water reduction targets.

As part of its energy efficiency policy, Marriott has installed and run CHPs at its UK sites for over 15 years. The installation of new CHP replacement units across 14 of its 58 UK properties in cooperation with Dalkia will bring Marriott a step closer to achieving its 2020 goal of further reducing energy consumption by 20% per kWh/conditioned m2 enterprise-wide, a target set by the group's Global Green Council.

With the hotel's existing CHP fleet nearing the end of its operational life and engine technology advancing over the past decade, Marriott International has its units upgraded by Dalkia's CHP division, Cogenco. The utilities and energy services provider has been Marriott's long-term partner since 1999.

Each of the 14 hotels will benefit from its own co-generation plant that produces electricity and heat from a single fuel source to cover energy demands. To match the locations' base electrical and thermal loadings the plants are individually sized, ranging from 121kWe to 400kWe. This latest CHP update will take the total co-generation capacity across sites to 4.22MWe.

The CHPs produce electricity and simultaneously recover the heat that is given off as a by-product during the electrical generation process. This thermal energy is retained within the system where it is used to heat water. Thus each onsite plant is able to cover electricity demand and domestic hot water usage, including the utilisation of leisure facilities at the respective hotel. Particularly, in hotels with high occupancy rates the application of state-of-the-art CHP can achieve a significant reduction of utility costs and carbon emissions.

John Conlon, Head of Engineering, Facilities and Capex Planning Europe at Marriott International, sees the new CHP fleet as a significant contribution to environmental conservation: "Our energy plants directly impact the environment that our business operates in. To preserve its health, it is vital to embrace those technologies that help to reduce our carbon footprint and the new CHPs will do just that. In collaboration with Dalkia, we are already planning the replacement of further CHP engines over the next two years."

The installation will be completed in the coming months. "We are expecting a smooth transition from the original fleet to the new units as the infrastructure for a CHP installation is already in place at the hotels. Our project managers ensure that any downtime is kept to an absolute minimum between the removal of the existing unit and the commissioning of the new unit on each site", affirms Cogenco's Sales Director, Damian Shevloff.