Some DDC system design procedures

2011 ◽  
pp. 223-245
Author(s):  
J. Knowles
Keyword(s):  
System Design ◽  
Design Procedures

scholarly journals Pressure Control of HVAC System for Corona Virus

2020 ◽  
Vol 5 (4) ◽  
pp. 462-468
Author(s):  
Samuel W. Chung ◽  
Jeong Je Jo
Keyword(s):  
System Design ◽  
Indoor Air ◽  
Pressure Vessel ◽  
Atmospheric Pressure ◽  
Pressure Control ◽  
Hvac System ◽  
Duct System ◽  
Close Attention ◽  
Design Procedures ◽  
Corona Virus

Corona Virus is deadly spread out to thousands of healthy people and so strong as to infect to the surrounding people after people.  We must keep the deadly virus indoor as much as we can.  How?  We must not allow the indoor air already contaminated to leak out to the atmosphere, which will transmit to other people. The new virus is so strong and so fast to transmit, it will spread within a few seconds to thousands of people and became patients immediately. To solve the problem, we must build a pressure vessel to keep the virus inside the vessel and not to leak outside. It should be a negative pressure compare to the atmospheric pressure. Another words, is to keep the indoor pressure lower than atmospheric pressure, so the contaminated indoor pressure is lower than outdoor pressure. It is a part of a traditional HVAC operation. This article shows step by step procedures of HVAC system design procedures, with emphasis of the air duct system design. Care must be taken to keep close attention to the maintenance of the system.

Everything you always Wanted to Know about HOS Micromodels but were Afraid to Ask

1988 ◽  
Vol 32 (16) ◽  
pp. 1051-1055 ◽  
Author(s):  
Regina M. Harris ◽  
Helene P. Iavecchia ◽  
Alvah C. Bittner
Keyword(s):  
System Design ◽  
Human Performance ◽  
General Purpose ◽  
Human Operator ◽  
Experimental Literature ◽  
Simulation Tool ◽  
Performance Models ◽  
Design Procedures ◽  
Human Operators

HOS-IV is a general purpose simulation tool for modeling human operators, systems, and the environment. To build a simulation, inputs to the model typically include descriptions of the system design, procedures for using the system, human operator characteristics, and a mission scenario. A set of operator micromodels are available to the HOS user to assist in the development of the simulation. These micromodels contain algorithms, based on experimental literature, that can predict the timing and accuracy of basic human cognitive, perceptual, and psychomotor actions. This paper describes the current set of human performance models available in HOS-IV as well as micromodels planned for development.

Research on LED Based on the Adjusting and Combining of Modularization

2011 ◽  
Vol 101-102 ◽  
pp. 72-76
Author(s):  
Li Na Chen
Keyword(s):  
Product Development ◽  
System Design ◽  
Design Thinking ◽  
Systematic Design ◽  
Product System ◽  
Engineering Product ◽  
Innovative Design ◽  
Research Results ◽  
Design Procedures ◽  
Set Up

Based on existing study on LED modularization, how to make flexible and convenient modular adjustments and combination on LEDs is studied in order to serve as requirements of LED’s functions and modeling. This research laid emphasis on the recombination of LEDs inside the module and the adjustments of modules. Combining with the theories of man-machine engineering, product system design, innovative design thinking and techniques in the product development, a set of systematic design procedures and methods on LED modular adjustments and combination were set up. With the application of research results, the author constructed a flexible and convenient LED lawn lamp which can make modular adjustments and combination.

scholarly journals PERANCANGAN INSTALASI LISTRIK PADA GEDUNG MARKAS KOMANDO DIREKTORAT KEPOLISIAN PERAIRAN DAN UDARA KEPOLISIAN DAERAH SULAWESI TENGAH DI DESA WANI

Foristek ◽  
2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Mohammad Agrimansyah ◽  
Nurhani Amin ◽  
Muhammad Sarjan
Keyword(s):  
System Design ◽  
Electrical Energy ◽  
Electronic Equipment ◽  
Office Buildings ◽  
Total Power ◽  
Lighting System ◽  
Design Procedures ◽  
Electrical Installation

In office buildings, electrical energy is needed to meet the needs of lighting to electronic equipment used in the building. To support all of that, a reliable electrical installation system is needed so that all office activities can run well without causing significant problems. Therefore the planning of the electrical installation system in a building must refer to the applicable rules and regulations in accordance with PUIL and SNI. The design carried out refers to PUIL 2011, SNI 03-6575-2001 (Lighting System Design Procedures). The entire electrical installation system gets a 3 Phase supply from PLN. The total power in this building is 80000 watts, so the power needed from PLN to connect is 160 KVA. Conductors used in this installation, use cables with NYM and NYY types with varying sizes in accordance with the calculation of the conveying CRC that has been done.

System Design: What, Why, and How

1993 ◽  
Vol 38 (1) ◽  
pp. 101-102
Author(s):  
Charles G. Halcomb
Keyword(s):  
System Design
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