Over recent years, many new technologies have been introduced to drive the digital transformation in the building maintenance industry. The current trend in digital evolution involves data-driven decision making which opens new opportunities for an energy centered maintenance model. Artificial Intelligence and Machine Learning are helping the maintenance team to get to the next level of maintenance intelligence to provide real-time early warning of abnormal equipment performance. This edition follows the same methodology as the First. It provides detailed descriptions of the latest technologies associated with Artificial Intelligence and Machine Learning which enable data-driven decision-making processes about the equipment’s operation and maintenance. Technical topics discussed in the book include: Different Maintenance Types and The Need for Energy Centered Maintenance The Centered Maintenance Model Energy Centered Maintenance Process Measures of Equipment and Maintenance Efficiency and Effectiveness Data-Driven Energy Centered Maintenance Model: Digitally Enabled Energy Centered Maintenance Tasks Artificial Intelligence and Machine Learning in Energy Centered Maintenance Model Capabilities and Analytics Rules Building Management System Schematics The book contains a detailed description of the digital transformation process of most of the maintenance inspection tasks as they move away from being manually triggered. The book is aimed at building operators as well as those building automation companies who are working continuously to digitalize building operation and maintenance procedures. The benefits are reductions in the equipment failure rate, improvements in equipment reliability, increases in equipment efficiency and extended equipment lifespan.

In large commercial and industrial systems, chilled water system serves as means to transfer heat from building spaces to the refrigeration system. Initially, when energy costs were low, constant volume and primary-secondary systems provided a stable and simple operation of the chillers and distribution systems. However, as energy costs increased, particularly in the late 1970s, the efficiency of the chillers and the costs associated with operating the distribution system became more important. As a result, the need for new schemes to improve chiller performance and reduce energy costs drove the HVAC industry to advance chilled water technology, particularly in the manner that chilled water is delivered. To understand the hydraulic considerations associated with delivering chilled water and how they influence system performance, it is important to understand how technology and design challenges over the years have influenced today's approach to chilled water pumping. This 5 - hour Quick Book discusses the history of chilled water distribution systems and the development of “variable primary flow system”. Problems such as low delta-T syndrome associated with the chilled water pumping schemes are defined and discussed and finally, this course compares the advantages and disadvantages of primary-secondary and direct-primary pumping schemes. Three chilled water schemes are discussed:SCHEME -1: CONSTANT FLOW CHILLED WATER SYSTEM SCHEME -2: PRIMARY / SECONDAY DISTRIBUTION SCHEMESCHEME -3: VARIABLE PRIMARY FLOW SCHEMEThe course includes a multiple-choice quiz consisting of twenty five (25) questions at the end to enhance course learning. Learning ObjectiveAt the conclusion of this course, the student will able to understand:1. The basic hydronic principles i.e. relationship of chilled water flow rate v/s cooling load and the energy savings due to adjustable speed pumps. 2. How do constant volume chilled water systems different from primary/secondary arrangement?3. What is low delta-T syndrome and how it affects the chiller loading?4. What are the causes and mitigation measures to prevent low delta-T syndrome?5. Why distributed pumping arrangement is better than headered arrangement for constant flow systems?6. How do primary/secondary chilled water systems create hydraulically independent loops?7. How to size the de-coupler bridge?8. The characteristics of control valves and why 2-way valve is better than 3-way valve in variable flow systems?9. How do the variable primary flow system compare with primary/secondary system in terms of cost and energy?10. The importance of design tube velocity and rate of chilled water flow variations in variable primary flow systems.

This book assesses the contemporary changes in design concepts and development trends of the major disciplines in building services engineering. Among the analyses featured are trends on heating, ventilating and air-conditioning, electrical and fire services, plumbing and drainage, and building automation systems. Powerful examples of well-known building projects in Hong Kong and Mainland China will be put forward and discussed. Published by City University of Hong Kong Press. 香港城市大學出版社出版。

Green buildings have become common in India and other countries in Asia. However, there is a concern regarding the performance of green buildings failing to meet the expectations of clients during the operation. One of the key reasons for this is poorly commissioned HVAC systems. In this publication we provide tools and knowhow for more efficient HVAC commissioning. It gives answers for four major questions: why commissioning is needed, how to perform proper commissioning, which key performance issues of common HVAC equipment need to be considered, and what kind of checklists are used during commissioning? It covers the entire commissioning process beginning with the owner’s project requirements and commissioning design reviews. Then, it explains procedures during installation and start-up of equipment followed by the functional performance testing, seasonal commissioning and 10 months’ operation review. This publication is developed by Indian Society of Heating, Refrigeration and Air Conditioning Engineers ISHRAE for Indian and Asian requirements in conjunction with the Federation of European HVAC Associations REHVA. The process steps described in this publication are in line with all major international building standards and green building certification schemes. Note: T&F does not sell or distribute the Hardback in India, Pakistan, Nepal, Bhutan, Bangladesh and Sri Lanka.