1. A New 3D Thermal Environment Visualization System for Improved Air Conditioning Comfort
Yukako Saisu, Tomohiro Konda, Kazuya Harayama
Conventionally uniform air-temperature profiles have been made using sensors installed on a wall or pillar. But recently, there has been interest in air conditioning methods that provide both comfort and energy savings by dealing with the uneven distribution of people and heat-generating equipment. This kind of advanced air conditioning control requires a detailed understanding of the indoor thermal environment, which wall- or pillar-mounted sensors cannot provide. As a solution, we have developed a thermal environment visualization technology and a system for profiling the thermal environment of a room in detail.
2. Thermal Comfort Evaluation Focused on Occupants’ Thermal Preferences:A Thermal Satisfaction Model for Small Groups of Occupants
Mayumi Miura, Haruka Ueda, Yuki Uno, Ryota Dazai
The thermal comfort indices contained in international standards are developed by statistical methods using data from a large number of people (e.g., the Predicted Mean Vote index of ISO 7730) which hardly reflect individual differences in thermal sensation. Therefore, in order to improve the thermal satisfaction of building occupants in an air-conditioned environment, an evaluation system that reflects their actual individual feelings is needed. The technology presented here enables evaluation of the thermal environmental satisfaction level of occupants based on their perceptions by constructing data models which describe the relationship between indoor environmental data and occupants’ feedback to the heating, ventilating, and air conditioning (HVAC) system by means of their thermal sensation votes. This paper reports the results of constructed models using real data from an office and presents sample applications of those models.
3. The savic-net G5 Supervisory Controller for Advanced Energy Management and Comfortable Indoor Spaces
Tsutomu Fukaura
To prevent global warming and ensure a stable energy supply, sustainable and advanced energy utilization management is required in buildings. In addition, offices require a comfortable space to promote intellectual productivity. Since these requirements may be contradictory, it is impossible to satisfy both using only individual controls for various types of equipment. In order to satisfy both requirements, it is necessary to understand the state of the entire building and to exert integrated, optimal control of multiple types of equipment. We have developed a supervisory controller with various advanced functions for savic-net&trede; G5 as a foundation for providing integrated control applications.
4. Technical Features of the Newly Developed General Controller and Compact Remote I/O Module for the savic-net G5 Building Management System
Kyoko Furuyama, Naoki Ishii
In addition to large-scale downtown redevelopment of property spurred by the 2020 Tokyo Olympic and Paralympic Games, demand for renovation of existing buildings has also increased and is expected to continue even after 2020. To solve problems such as labor shortage in the construction of new buildings and in the instrumentation of renovations at the site of existing buildings in Japan, the General Controller and the Compact Remote I/O Module have been added to the savic-net G5 system product lineup. We describe their technical features.
5. A New Advanced Controller for Building HVAC Central Plants that Provides High Added Value
Hideo Kubota, Hidetaka Sekine
For control of central plant equipment, which is an important part of a building’s HVAC facilities, we have sold PARAMATRIX for more than 30 years, during which time we have accumulated know-how on various kinds of controls. In the aftermath of the Great East Japan Earthquake, the configuration and method of operating central plant equipment is changing, and furthermore, in view of the declining population, the need to improve work-life balance, etc., minimization of the labor required in installation and engineering is desirable. In addition, since the effective utilization of energy is an important issue worldwide, the importance of controllers of central plant equipment
for buildings is increasing. To meet these new needs, we have developed the Advanced Controller for building plant systems for global and domestic markets as part of the savic-net G5 new building automation system.
6. Technology and Features of a Thermal Flowmeter for Liquid Microflows
Yasuhiko Oda
In recent years, due to advances in manufacturing processes and more stringent quality requirements, highly accurate measurement of microflows has become necessary. We have now developed a thermal flowmeter for liquid microflows, model F7M, capable of measuring with an accuracy of ±5 % of reading for micro flow rates of 30 mL/min and less. Moreover, this device has low pressure drop,
high reliability, and a compact size. In order to create a model with these features, we developed several technologies: a flow sensor module using fused quartz glass tubes and a MEMS (microelectromechanical systems) sensor; a small straight pipe flow-path structure, and equipment capable of measuring actual micro flow rates with a high level of accuracy. We discuss the features of the F7M and the technological developments that made it possible.
