Generating power with natural gas and putting waste heat to work. Generating power with natural gas and putting waste heat to work.
At Roppongi Hills, we have adopted a large-scale district energy system (Cogeneration + DHC). A huge natural gas-fueled co-generation plant recovers the waste heat from a central electrical power generation system and uses it to meet the heating and cooling needs of the community.
Saving energy with a high-efﬁciency system Saving energy with a high-efﬁciency system
By generating power with gas and putting waste heat to work, the highly efﬁcient system provides approximately 20% primary energy savings, which in turn reduces CO2 and NOx emissions.
Efﬁcient district-wide energy utilization
Though one of the earliest major development undertaken by Mori Building, the ARK Hills project featured the introduction of a district heating and cooling (DHC) system. A sub-plant is located in the Akasaka Intercity project, which was developed in the neighboring district, promoting the establishment of an Area Energy Network and further energy conservation.
Eco-friendly Thermal Storage System
- Thermal storage HVAC system concept
- (Peak HVAC Load Day,
- Example of the heat pump operation program)
This system averages the electrical power load over the day by the nighttime storage of the energy used for daytime HVAC operation. This redistribu- tion of the power load reduces the burden on the environment by shifting electrical power consumption to nighttime hours when the usage of fossil fuel for power generation is lower and contributes to reduced load on the power generation plant.
|Speciﬁcations of Mori Building Properties with Thermal Storage Systems|
|Atago Green Hills Mori Tower||86,570m2 of ofﬁce & retail space||800 RT absorption type (400RT x 2)
600 RT brine turbo (ice manufacture phase)
720 RT brine turbo (demand fulﬁllment phase)1,000 RT absorption type (400RT x 2, 200RT x1)
|1,720 RT capacity of the thermal storage tower (including demand fulﬁllment) 860 RT x 2|
|Holland Hills Mori Tower||2235,656m2 of ofﬁce, residential &retail space||700 RT steam generator (350RT x 2)
200 RT brine turboMori Tower
|610m3of chilled water thermal storage tank(thermal stratiﬁcation tank)||300 RT capacity of the thermal storage tower
Heat exchanger 300 RT
|Akasaka Tameike Tower||47,758m2 of ofﬁce, residential &retail space||420 RT steam generator (210RT x 2)
200 RT Double-hand turbo
|700m3of chilled water thermal storage tank
(thermal stratiﬁcation tank)
|400 RT capacity of the thermal storage tower Heat exchanger 400 RT
|Mori TowerPrudential Tower||76,585m2 of ofﬁce, residential &retail space||1,000 RT absorption type (400RT x 2, 200RT x1)
400 RT brine turbo (ice manufacture phase)
600 RT brine turbo (demand fulﬁllment phase)200 RT Double-hand turbo
|1,100 RT capacity of the thermal storage tower (including demand fulﬁllment)
Rel. heat from heat exch. 250RT×2
Rel. heat from heat exch. (demand fulﬁllment phase) 600 RT
Our commitment to the total elimination of wasted energy
- 1. Regular assessment of energy consumption
- 2. Identiﬁcation of potential faults
- 3. Conﬁrmation and optimization of automated management
With its BEMS (Building Environment and Energy Management System), Mori Building has a comprehensive grasp of building energy utilization and the state of the interior climate and the knowledge necessary to optimize energy conserva- tion. The centralized monitoring system allows managers to conﬁrm the state of energy utilization in real time. By accumu- lating and analyzing data, we can identify and eliminate excessive energy usage and waste. Under national government policy to promote the adoption of BEMS, the New Energy Development Organization (an incorporated administrative agency) known as NEDO has system of subsidies to encourage installation of energy efﬁcient systems. Currently three Mori Building properties are beneﬁciaries of this subsidy program: Roppongi Hills Mori Tower, Holland Hills Mori Tower and Toranomon 37 Mori Building.
As a result of BEMS optimized management of cutting-edge energy-saving systems, Roppongi Hills Mori Tower and Holland Hills Mori Tower recorded actual annual energy consumption in 2007 signiﬁ- cantly less than initial projections: -23% and -16.7%, respectively. Exploiting the strength of Mori Building’s integrated approach to development projects from the planning stage to operational management, BEMS Operation Promotion Councils have been organized in buildings equipped with BEMS. Working as one, our Planning Division, Management Division and various companies that support building management and maintenance endeavor to conserve energy and reduce CO2 emissions.
|Name||Existing/New||Scale/Gross ﬂoor space||Management system check points|
|Roppongi Hills Mori Tower||newly constructed||
54 ﬂoors above ground,6 underground levels
||approx. 4,000 pts|
|Holland Hills Mori Tower||newly constructed||
24 ﬂoors above ground,2 underground levels
||approx. 4,000 pts|
|ARK Mori Building||existing||
37 ﬂoors above ground,4 underground levels
||approx. 4,000 pts|
|Omotesando Hills||newly constructed||
6 ﬂoors above ground,6 underground levels
||approx. 2,000 pts|
|Toranomon37Mori Building||existing||13 ﬂoors above ground,2 underground levels approx. 36､700m2||approx. 800 pts|