EGI-04. บทความที่ประชุมวิชาการ (ระดับนานาชาติ)
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กำลังเรียกดู EGI-04. บทความที่ประชุมวิชาการ (ระดับนานาชาติ) โดย ผู้เขียน "Denchai Woradechjumroen"
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รายการ Evaluation of CPMS installation and performance for energy savings(Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi (KMUTT), 2565-12-13) Denchai Woradechjumroen; ์Nontawat MoonsriA large building or a factory with an open office area is commonly used for a centralized chiller plant system (CPS), including a chiller, chilled water pump, condensing pump, and cooling tower. A centralized control system called chiller plant management system (CPMS) has been installed to reduce complex operations and allow the system to operate according to the settings for appropriate working time. Even though there is an installation guide from developing countries, installing hardware and software in Thailand still lacks clear standards or guidelines. As a result, the communication speed between the control system and the device is inappropriate. It leads to restrictions on data transmission and difficulty assessing performance with appropriate data. As a guideline for future development, this research proposes development for evaluating hardware, software and CPMS performance (characteristic quantity (CQ) and heat balance). It is divided into hardware checks according to aggregate communication and sub-communication to obtain adequate data for the system performance evaluation. The guidelines have been developed by recommended equipment manufacturers widely used in Thailand. It is used in three large-scale commercial buildings. It was found that the communication device supports data transmission every 15 minutes, there is no communication signal interruption, and the software system is suitable for recording CPS data to support: (1) energy-saving assessment and (2) process of ecU9zzVtYvaluating the performance of the CPS system in terms of CQ analysis and heat balance theory. The finding process can be used to evaluate exiting CPMS performance before the improvement.รายการ Preliminary Development of Retuning Process for Energy Savings in Thailand(Faculty of Architecture and Planning, Thammasat University, 2566-06-21) Denchai WoradechjumroenThe retro-commissioning process has been energy-saving, around 20% on average in the United States. However, it has not been intensively used due to the cost-prohibitive issue of improving the building's existing air conditioning system to make it more efficient, which consists of the cost of the measurement system, replacing more efficient equipment, the cost of pre-and post-improvement inspections, resulting in a payback of more than three years. To solve the above problem, the Pacific Northwest National Laboratory (PNNL), a national laboratory under the control of the United States Department of Energy, has carried out designing a new process called re-tuning process; the process emphasizes correcting the original control system of the building, efficient use of building resources while remaining only the labour cost of adjusting the correct control system resulting in savings about 5 – 30% and low investment. The process can be performed every three years when building operations have improper operations. This research analyses and develops the retuning process applied in Thailand using the BAS data framework by analysing three main constraints, which are 1) CPMS (chiller plant manager system) guide, 2) AHU (air-handing unit) guide, and 3) zone guide to finding limitations of re-tuning to Thailand. Due to data and connectivity limitations of the BAS systems, the new process includes five steps of chiller operations. This tool can modify a CPMS system and lead to energy savings when existing systems are corrected by the tool to achieve an average of 5% energy savings for the chiller power consumption.