LCD/Cx[Commissioning]

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Performance validation is the key when considering Life Cycle Design
When thinking about the Life Cycle Design (LCD) of buildings, it is vitally important to consider how to build in ideas and techniques that will allow the building to be used for a longer period. Cx (commissioning, which is performance validation) is one technique for maintaining building performance in the long term. Continuous commissioning is particularly important at the operation stage, to keep energy consumption at the minimum level at all times. Nikken Sekkei Group makes diverse proposals to support continuous commissioning.

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Life Cycle Design Provided by the Nikken Group

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The life cycle design provided by the Nikken Group aims to make the land, building, equipment, and other facilities that are the customer’s management assets into “true management assets” to achieve the customer’s business activities and business strategy throughout the life cycle of those assets.
We propose services for each category; business, project management (PM), planning and design, and technology throughout the life cycle, starting from basic investigation at the project conceptualization stage, through strategy building, briefing, design, construction, operation, investigation and diagnosis, issue discovery, renewal and renovation, usage policies, to exit strategy.

Commissioning (Performance Validation)

Intelligent-BEMS
Intelligent-BEMS (i-BEMS) gathers data of the target building’s energy consumption and the operating status of its equipment via the Internet and resides it on a high-security external server. This system enables experts to analyze stored data in real time. The simulator (using the LCEM tool) within i-BEMS is used to build a model corresponding to the services systems within the customer’s building, input measured data, calculate the current ideal operation method with high precision, and propose more efficient operation methods

Commissioning is the process by which a performance validation team validates the designer’s design work and drawings, and the builder’s construction work and equipment quality, and runs performance tests where necessary, to reliably deliver the performance that is demanded of the building. Nikken Sekkei Group can provide commissioning services at all stages.

Energy-saving and Carbon-reduction Refurbishment Design

Example of calculating effects from the application of energy-saving measures

Nikken Sekkei Group uses on-site walkthrough investigations and detailed analysis of energy data to reveal key points to be addressed for energy-saving measures, and to make effective proposals which reconcile energy-saving with economy. 
From the results of the energy analysis, we address points capable of energy-saving refurbishment or improvement by selecting energy-saving methods based on comprehensive consideration of the purpose of the facilities, how they are actually used, the numerical targets set by legal regulations, and other aspects. As a result, we can study investment efficacy by making trial calculations of refurbishment, operation, and other costs. After renovation, we validate the expected effects at the design stage have been realized.

Eco Monitors to Motivate More Ecological Operation

The concept of real-time eco monitoring The concept of real-time eco monitoring

Example of real-time eco monitoring

This project devised a visualization system to provide real-time responses, in order to understand energy consumption quantities and operate equipment more ecologically. The system also provides a function to motivate users to actively participate in ecological building operation by showing the environmental effects of their behavior.

Flexible Plumbing Design

Although gravity drainage has been the norm, pumped dranage systems enables more flexible layout of wet areas. This project contributes to richer space design while studies the problematic issues such as water leakage, noise, and design techniques when installing multiple pumps.

Considering Equipment Renewal and Transportation Plan from the Initial Planning Stage

Simple chart for lift planning Simple chart for lift planning

This project created a database of equipment renewal and transportation, which is essential for life cycle design, and a chart for a quick check of equipment transporatation requirements, building layout and dimensions.

Accurate Equipment Design Based on Statistical Data

Statistics of cooling loads and exhaust air volume for food service facilities Statistics of cooling loads and exhaust air volume for food service facilities

In order to identify appropriate equipment capacity for different types of food service facilities, this project investigated the cooling load and exhaust air volume in full meal, light meal, food retail, and food court.

Environmental Performance by Envelope Renovation

This project studied the environmental performance of renovating the envelope of an existing building. Considering the indoor and global environmental performance improvements, facade design, ability of construction during building operation, double skin was the most suitable method for renovating builidng envelope.

These ideas originated with "ID200", an activity where about our 200 engineers from the Building Services Design Division propose suggestions each year.

ID200

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