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progr..s R.pat Evalwtbn of V.ntN.tion 8yst.ms Novemtier 18, 1992 TASK 4 QUALITY ASSURANCE AND QUALITY CONTROL Performance of instrumentation and quality of data is monitored and controlled as data is collected. TASK 5 DATABASE DEVELOPMENT Database development is scheduled to start in December. The parameters for inclusion in the database are now being studied. Most instrumentation used in this project have either IEEE or RS232 protocols. A 16 channel data logger will initialiy record the data which will then be transferred to one-time writing devices (e.g. worm drives). From this source the data will be brought into a data base management system (DBMS) for analysis using commercially available software. If needed, programs will be developed for appropriate analysis and presentation of data. TASK 6 TESTING AT RICHMOND Initial tests have been completed in the FACT test room at Philip Morris Research Center in Richmond, Virginia. Air temperature, air velocity and tracer gas (SFj measurements have been taken in the supply air duct, the test room, and the exhaust air duct at flow rates of 500 and 1000 cfm with 100% outside air. The tests were beneficial in establishing experimental procedures, checking-out instrumentation capabilities and identifying needed modifications of the test room controls. Room air temperature distribution was found to be nearly uniform but attempts to hold the supply air at a constant temperature were unsuccessful due to supply air-temperature fluctuations of 10° - 16° C caused by room temperature sensor-driven commands to the HVAC system (see Figure 3). Since performance evaluations of the air distribution will be difficult with these temperature

Progress Repa1 Etr.lu.Uon of Ventfl.tfat Systems November 18, 1992 variations, it Is recommended that the control system be modified to allow for more precise supply air temperature control. Tracer gas measurements, using both the step-up and decay techniques, were conducted to measure air change effectiveness. Figures 4(a) through 5(b) show the resulting tracer concentrations for the 500 cfm and 1000 cfm runs. The tracer gas concentrations were integrated over time to calculate the local age-of-air at each measurement location. Exponential curve fits were also applied to the data to enable comparisons of automated age-of-air integrations with the raw data integrations. Al integrations Included the effect of the missing, infinite-time data asymptote by multiplication with the appropriate constant calculated from the exponential curve fits. Room and exhaust age-of-air values, along with the computed air change effectiveness, are listed in Table I. These values indicate partial displacement flow in the test room with little effect in air change effectiveness due to increasing the flow rate from 500 cfm to 1000 cfm, although the age-of-air decreased more than 500%. However, these flow conditions may have been substantially altered from the ideal due to the large and frequent temperature fluctuations in the supply air. Tracer gas evaluations of contaminant removal effectiveness were prevented due to large fluctuations in the tracer gas supply rate. This problem has been corrected and future evaluations will determine this parameter for the test conditions of interest.

Aogi RePw November 16, 1992 Table 1 Flow Rate (in cfm) 500 500 EvaluwNon of V.ntilatlon Syst.aa Results from tracer gas measurements in test room at Philip Morris Research Center, for two flow rates, all outdoor air. 1000 1000 0 Location of sample point 1.1 m height in room exhaust 1.1 m height in room 1 exhaust Age-of-Alr ( In minutes) Air Change Effectiveness 5.5 130 72 2.3 140 3.3 The test room control system is being modified to allow for supply air temperature specification. Additional tracer gas evaluations of the air change effectiveness and contaminant removal effectiveness will be conducted under various flow conditions. Instruments for future, more detailed evaluations will be acquired. Detailed measurements to obtain baseline data for the vertical displacement system will begin in December 1992. Subsequently, the air distribution system of the test room will be modified to a ceiling supply system and testing will proceed in the second half of January 1993. In addition, an apparatus to simulate a cold or hot surface (window) in the test room, now in the preliminary design stage, will be constructed and tested. Phyakud sysooms Tasks 10

30 28 -o- Supply Air, °C -a-. Room Ref, °C 26 16 U1 0 U -&- Exhaust Air, °C 14 12 10 f- 500 cfm . . . . . . . . 12:00:00 PM 12:30:00 PM 01:00:00 PM 01:30:00 PM 02:00:00 PM 02:30:00 PM 03:00:00 PM 03:30:00 PM 04:00:00 PM 04:30:00 PM Tlme of Day - Runs 1, 2, 4, 6, and 7 Figure 3 Resutts from temperature measurements, with 100% outside air supply (test room at Philip Morris Research Center). Physical Systems Tasks 11 U494stzOz

(a) Dosing as Measured In Sunniv, r Duct 2.5 2.0 0.5 0120:00 PM 0 0.0 12:10:00 PM 2.5 2A 0.5 0.0 1220:00 PM 01:00:00 PIiA (b) Des~l p as Yemured at t.tm X.1oM In Room Camar S~TQ 01:10:00 PM dl~ ePOA= 0 12:30:00 PM 12i0:00 PM Tim. of D.y-Run #1 0 0120A0 PM 01:,0:00 PM Tllnw of 0ay-Ran #2 12S0:00 PFA 01 Z0:00 PM (c) Dosing as IlAeasured In Exhaust Air Duct 0 0 0 02:00A0 PM Figure 4 Tracer gas concentrations, flow rate of 500 cfm, wiih 100% outside air supply (test room at Philip Morris Research Center). Physical sysoems Tasks 12

Progns R.pat November 18, 1992 Evdwtbn of V.ndlalion SyaNm. (a) Dosing as Measurad at 1.1m Helaht In Room Center (b) Dosing as Nleasurad In nha ust Air Duct 2.0 1.5 0.5 0.0 02:40:00 PM 02:W.00 PM 03:00:00 PM 03:10:00 PM Time of Day-Run $6 0320:00 PM 03-W.00 PM Figure 5 Tracer gas concentrations, flow rate of 1000 cfm, with 100% outside air supply (test room at Philip Morris Research Center). ar,yswW sysOM TaSxs 13

progre.. Report Evaiwtfon of V.etilathm Syat.na November 18, 1992 TASK 7 ACQUISITION AND DEVELOPMENT OF INSTRUMENTATION Purchasing of the additional required instrumentation has been initiated with expected delivery in about three weeks. Instrumentation now on order are: Muiti-point Sampler and Doser Type 1303 from Bruel and Kjaer. Application Software Package Type 7620 from Bruel and KJaer. Low velocity transducers, 54R10 and cables, 54B101 from DANTEC. Multi Channel Flow Analyzer, 54N10 and 3-channel input module, 54N21 from DANTEC. Additional temperature sensors based on RTD-Pt 100 sensor will be acquired. A data logger system from Keithly Instruments will also be acquired. RnyskW syswns rascs 14