The trading activities are conducted in One Bryant park. The related floors are draped in video screens to stream financial information which results in higher energy consumption. The all glazing facade also results in significant heat losses. By incorporating the combined heat and power plant (CHP) capable of generating 70 % of the building electricity and an absorption chiller powered by waste heat
Fig. 7.20 Displacement ventilation in the lobby, © photo by the author
Fig. 7.21 Daylighting analysis of one of the offices, © M. Keramati
Fig. 7.22 Cross section of building, (a) cooling strategies, © M. Keramati; (b) cogeneration strategies
from CHP plant and ice storage, the building can achieve energy improvements over the ASHRAE 90.1-2204 baseline. The debate is ongoing on the principle of energy- efficient design, which basically starts with minimizing the loads and then investing on the systems to serve the loads. This building invested on the technologies is opposed to the envelope upgrades (Fig. 7.23).
Actual energy consumption at One Bryant Park is 12.7 % lower than predicted at design. The energy-efficient HVAC systems, demand control ventilation with
Fig. 7.23 Projected saving by Living Lab NYC May 6, 2015 4.6 MW gas turbine cogeneration systems, and chilled water plant with waste heat absorption and ice production reduce the building’s electric demand and offset the energy needs. However, still the source EUI of the building is 336 kBtu/ft2 in 2013 that exceeded the expectations of the design which shows the saving is 9.9 % better than 90.2-2004 ASHRAE standard.