Document gvapQO69BOM66weq0374bdN

230 Controls and Instruments Another viewpoint on a timely subject from a Honeywell Engineer Systems AnaIysis...Key to Improved Operations in Today's Buildings In the building profession today, architects,consulting engineers and contractors are being challenged to use new techniques to satisfy the demand for greater comfort, con* venience and economy in all types of commercial buildings. During the past 50 years, mechani cal, electrical and elevator equipment have become an increasingly larger part of the total building cost--from barely 10% in 1900 to almost 50% today. To satisfy the demand for greater comfort, and to make maximum use of equipment, planners and designers are turning to centralization. But while centralization provides great ' savings, it does not assure maximum use of the equipment involved. Why? Because in designing major commercial buildings, planners con sider operating costs, maintenance procedures, equipment servicing and, in some cases, even, expected equip ment life. However, this analysis is performed in terms of designed con ditions and is based upon perform ance criteria when the chosen equip ment is new. Systems analysis is needed, to provide optimum efficiency after equipment Is in operation Systems analysis provides ' for the recording and analyzing of critical operating information. Then, it pro vides for starting, stopping and run ning all equipment with the sequenc ing of operation and the degree of loading that will provide optimum efficiency while supplying the exact needs of the building. Obviously, a system analysis ap proach to the operations of commer cial buildings involves more than merely temperature control systems, however elaborate they may be. It involves more than centralizing the operations of certain key functions. It is the determination as to which data should be obtained and trans mitted to a central location where it can be analyzed for optimizing the operation of mechanical equipment.' It involves determining the efficien cies and the change in efficiencies re sulting from changes in loads, service attention provided the equipment, wear and tear on the equipment. Properly engineered and applied, systems analysis provides informa tion to: 1. Optimize key control functions. 2. Optimize starting and stopping time of mechanical equipment. 3. Optimize load control of refrigera*. tion plants. 4. Optimize the operation of heating plants. 5. Provide necessary directions to establish service and maintenance schedules to conform to the need --rather than accomplishing this task on a routine schedule. 6. Provide directions as to the time major overhaul is more economical than operating at lower efficien- ZUJ1 1 % Efficiency --i 1 1 >! atm EtUdeney sained by N t J vr X\ i*f Trotted | 10 20 30 40 SO 60 . 70 SO 90 100 % Of CAPACITY LOAO Chart shows typical example of effi ciency gained by optimum control of three compressors. Considerable savings can be realized Because systems analysts provides required comfort or process condi tions with optimum efficiency, it cuts operating costs, reduces operating manpower and decreases service and maintenance expense.^ It can also extend -the life of pri mary equipment such as refrigeration and heating plants. Better comfort conditions can be obtained because troublesome breakdowns of either temporary or major nature often can be anticipated.and prevented. Basic system requirements Several approaches are possible to provide the information necessary for systems analysis. The key require ments of such systems are: 1. Provide the means to transmit large amounts of key data to a central location. This data must be related wherever necessary to other data. It must be taken si multaneously if the information is to have significance. The data must be related also to load con ditions on the building. Load con ditions, of course, may result either from external or internal, changes. 2. Provide quick and accurate meth ods to analyze the data. The amount of data in some cases may be relatively large. 3. Provide the means by which one operator, from a central location. can take corrective action in terms of either manually or automatical ly starting and stopping equip ment, changing control points, changing the operations of the heating and refrigeration systems, or dispatching personnel. Necessary equipment and planning help available from one source--Honeywell The first step in planning systems analysis is to determine whether or not it is economically justified for the Ereposed structure. Honeywell will e glad to work with you in determin ing the practicality of any installa tion. The next step is to select equip ment that's reliable, accurate and economical. Honeywell can supply almost all needed equipment regard less of the size and requirements of the installation. This includes: Sensing elements for measur ing pressures, temperatures, flows. BTU's electrical power and efficiency. Equipmenttotransmitvitaldata with less than Ya% error. Data acquisition equipment to receive and log information with out introducing any additional error. Charts and graphs that make it easy to relate data received to optimum operation of equip ment. Equipment to start and stop systems and make necessary control adjustments. Computers, when practical, to analyze data and give an oper ating engineer complete instruc tions for operating his building. The systems engineering approach goes beyond centralization. It is truly the way to the automated building where mechanical and electrical sys tems perform to meet exact require ments at minimum possible cost. What's your viewpoint? If you have any comments, questions --or would like additional informa tion--please write to: W. N. Wray, Minneapoiis-Honeywell, 2753 Fourth Ave. South, Minneapolis 8; Mina* Honeywell gj] Controls and Instruments 231 SPECIFY MOELLER FOR QUALITY INSTRUMENTS The MOELLER ADJUSTABLE ANGLE INDUSTRIAL THERMOMETER . Saves time Cuts Costs ADJUSTS TO ANY ANGLE FOR ANY INSTALLATION . . RIGHT ON THE J08 Positive locking No special tools Completely protected Capillary 7',12" Scales Standard loogos front -- to +750F. Send lot Caftdog No. 100 Send for literature on these Moeller Products and for Fixed Form, Pipeline, Air Duel, Small Cose and BIMET- Dial Thermometers. . ,,,,,, *. tt,,;*,,* Co MOELLER INSTRUMENT COMPANY, INC.s 132nd STREET & 89th AVENUE RICHMOND HILL 18, N. Y. .*' RepreianSOfives in Principal Cities