All for one T
A new luxury hotel in central London has installed a range of technology aimed at providing energy efficient heating and power. Mark Jansen reports
he Park Plaza Westminster Bridge is one of London’s newest hotels, with over 1,000 guest rooms, a 1,200 m sq ballroom and 31 meeting rooms. The Park Plaza hotel chain is owned
by the Israel-based Red Sea Group, and most of the consulting and design teams are also based in Israel. The heating and hot water systems were designed by Zvi Pollak Consulting Engineers. Pollak notes that ‘this is the first hotel where we have used renewables to such an extent’. The heat and power used by the new hotel is delivered using a range of technology, including renewables: a biomass boiler, a gas-powered combined heat and power (CHP) system, and six gas-fired cast-iron high- efficiency boilers. The 1,200 kW boilers have a seasonal efficiency
of 86%, according to manufacturer Buderus. Joerg Buetow, its senior technical product manager, says the
50 CIBSE Journal October 2010
boilers have sufficient capacity to provide 100% of the hotel’s needs, acting as back-up for periods when the biomass and CHP units need maintenance. Buetow argues that condensing boilers would
not have worked in condensing mode in this hotel system. For a condensing boiler to work efficiently, the temperature of the return water must typically be below 55C, he says. However, the hotel’s air conditioning system and the constant massive demand for hot water all require water at high flow temperatures. This means the return water is too hot for condensing boilers to work effectively, he says. A large part of Buetow’s role on the hotel project
was in advising how best to integrate the three energy sources – gas boilers, CHP and biomass boiler – and the absorption chiller into one system. This involved many calculations, particularly around pump and pipe design, as well as safety devices. All the energy sources >
www.cibsejournal.com
All photos: Anna Branthwaite
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84