Direct Digital Control

[Institute Name]

Table of content

Introduction4

Background5

Noise Control6

Pneumatic Control7

System Components7

Air Compressors7

Pressure Reducer8

Small-Building Systems13

Conventional Hvac System Deficiencies13

Reduced Control System Complexity,14

Remote Monitoring (Workstation).14

Designing A DDC System20

Cost Analysis: DDC versus Pneumatic Control21

Conclusions22

References24

Appendix25

Direct Digital Control

Introduction

The HVAC system is comprised of a number of options and controls that have a variety of usage depending on the situation.The system of heating scheme, ventilating and air-conditioning (HVAC) options are the prime control options in a well developed HVAC system.

Background

Studies show that workers favour daylight to artificial lighting in the workplace. There are three kinds of artificial lighting are utilised in agency lighting. These lights are incandescent, fluorescent and high power release lamps. Incandescent light is a kind of lightweight, which is routinely utilised in the home. It encompasses the use of electric driven lightweight bulbs. This kind of lightweight is lower than the lightweight of day but they are not as productive in supplying an ample grade of illumination. Fluorescent lights are generally made through long tubes. (American Society of Heating, 2002)

They use only a third of electrical power spent by incandescent lamps. They supply more even lightweight distribution. High-discharge lights for example headlamps, which are utilised in stadiums and on the streets. These adversities, whereas, is not started by dim lighting alone. Although poor lighting directs to eye fatigue, lightweight is too bright, may more over source some adversities due to reflection of lightweight from the computer brandish and so on. In alignment to deal with the adversity of reflection, lightweight can be used. This is where uplights are used to direct lightweight and contemplate off the ceiling and other areas. It is therefore important to double-check the most befitting degree of lightweight in a conceded situation. Direct digital command (DDC) scheme is one of convoluted command schemes, in the HVAC commerce supplying an submission for correctness and command power consumption. Mechanical-hydraulic and electro-hydraulic schemes are utilised in conjunction with Direct Digital Control systems. Pneumatic controls should not be utilised on power systems. Maintaining the effectiveness of lighting should more over address the affiliated costs. An important part of bureau lighting is the use of natural lightweight (sunlight) Activities that need the utmost allowance of treatment conceive, construct journals and photographic work. Those localities that need smaller grades of lighting lobbies, receptions and libraries. (Alaster Haems 2003 Pp. 32)

Noise Control

Monitoring of disturbance grades in the agency performances an significant function in conceiving an natural environment that is ergonomically sound. There are two major facets of supervising the disturbance grade in the office. The first of these is to decrease disturbance grades in environments where disturbance grades are too high. Others too conceive a certain grade of "noise", where the agency is absolutely relaxed.. It should be audible sufficient to endow persons to be creative without being blaring sufficient to divert them from their tasks. Despite the countless benefits of DDC, accepted pneumatic command scheme is still utilised for some developed submissions, HVAC due to its benefits, which will be considered later.

Pneumatic Control

Using compressed air as a ...