ComfortSense - Thermal Comfort Measurement System Brochure

ComfortSense Thermal comfort measurement according to EN 13182, ISO 7726, ISO 7730, ASHRAE standard 55 and ASHRAE standard 113Applications• Air velocity and temperature, humidity and operative temperature measurements with up to 96 probes in indoor climate test rooms • HVAC research and development• Passenger comfort studies in the automotive and aviation industries• Testing of ventilation components• Building research• Agricultural science and industry - livestock comfort• Verification of CFD calculations• Evaluation of heating and cooling system performance• Evaluation of thermal sensation and discomfort for humans• Personal ventilationFeatures• Traceable calibration of all probes• Fast-response, omnidirectional probes for low air velocities• Probe for high air velocities - temperature compensated• Up to 96 measurement positions• Interconnectable probe cables• Built-in A/D converter with USB 2.0 interface• Draught rate according to ISO 7730• Application software with graphical presentation of results including Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied (PPD) • Probe library and creation of measurement gridIntroductionThe ComfortSense system is designed for research anddevelopment of heating and air conditioning systemsrequiring multi-point measurements of air velocity and tem-perature. Draught measurements require omnidirectionalsensors with a frequency response of at least 2 Hz, whichis fulfilled by the present system.Measurements near diffusers, grilles and supply nozzlesrequire a higher velocity range, and directionally sensitivesensors can be used, provided that the main flow directionis known. For thermal comfort measurements, operativetemperature and humidity probes are available, and in set-ups where manikins are used, special omnidirectionalprobes for built-in applications are available. The systemincludes both types of sensors.ComfortSense Product Information Range of probes.54N90 ComfortSense main frame.Directional characteristics for 54T33 draft probe.2Manikin equipped with 54T34 draft probes. DescriptionThe ComfortSense system consists of a main frame withinput channels for up to 16 probes. The omnidirectionalprobes measure both air velocity and temperature. Sixframes can be connected so that up to 96 probes can bemonitored simultaneously. The ComfortSense main frame has a built-in A/D converterwith USB 2.0 interface.We have made it easy to set up a measurementsequence and a measurement grid with selection of probesfrom a user library. The software delivers statistical resultsbased on user-defined measurement cycles. The ruggedlydesigned probes and cables are perfectly suited for largetest rooms.System overviewThe ComfortSense frameThe compact 54N90 ComfortSense main frame can be con-figured with 2 to 16 input channels to suit both present andfuture measurement position needs. Up to 6 frames can beinterconnected to cover up to 96 measurement positions.No time-consuming configuration of external A/D convertersis needed - the built-in 16 bit A/D converter and USB 2.0interface make setting up quick and easy.The probesDraft probes - 54T33 and 54T34 The new range of high-precision probes are made of stain-less steel. Both directional characteristics, overall accuracyand frequency response have been improved to a highperformance level which fully complies with internationalstandards.The 54T33 drauft probe is equipped with an omnidirec-tional thin-film sensor for measuring air velocity and a smallfast-response thermistor for measuring air temperature.The velocity sensor consists of two quartz spheres 3 mm indiameter, coated with a thin film of nickel and covered by aquartz layer. One of the spheres is kept at a constant over-temperature relative to the other and the energy needed formaintaining this over-temperature is measured. A unique transfer function converts the measured heatloss into an air velocity. The delicate spherical sensor iswell protected by a robust cage. Due to the slim-linedesign, the probe obstruction of the flow is minimal. The54T33 draft probe is suitable for indoor climate applicationssuch as testing of ventilation components, and can easilybe mounted on a tripod or a traversing system.The manikin version of the 54T34 draft probe is verycompact, with a flexible cable connection to the probe tip,making it suitable for building into a manikin for passengercomfort applications. High Velocity probe - 54T35The 54T35 probe is temperature compensated and equip-ped with a set of robust velocity and temperature sensors.It covers velocities from 0.1 m/s to 30 m/s and tempera-tures from -20°C to 80°C. Suited for test of fans, blowersand other ventilation components.ComfortSense Product Information Presentation of PMV and PPD calculations.On-line display of probe data and warning indicator.Data presentation with 3D contour plot animation.3Humidity probe - 54T37The sensor used in the 54T37 Humidity probe measuresthe relative humidity directly. The measuring principle isbased on the hygroscopic properties of a polymer enclosedbetween two electrodes. The thin polymer film eitherabsorbs or releases water vapour as the relative humidity inthe ambient air rises or falls. The dielectric properties of thepolymer film depend on the amount of water vapour con-tained in it; as the relative humidity changes, the dielectricproperties of the film change and so the capacitance of thesensor changes. From the measured value of the capaci-tance the unit calculates the relative humidity.Operative temperature probe - 54T38The measuring element of the 54T38 operative temperatureprobe has an ellipsoidal shape with a diameter of 56 mmand a length of 160 mm. The sensor element is a nickelwire coil, measuring the average surface temperature of theellipsoid. The form and size of the measuring element facilitatedirect measurement of the operative temperature. Its size ischosen so the heat loss ratio between radiation and con-vection is similar to that of the human body. The shape of the measuring element is chosen so thathot or cold surfaces have a similar influence on the sensoras on the human body. The sensor element simulates astanding person when it is vertical, a sitting person whentilted 30°C from vertical and a reclining person when in thehorizontal position.The colour and surface structure of the measuring ele-ment is chosen to simulate an average dressed person asclosely as possible.The application softwareThe versatile application programme incorporates a probelibrary from which the probes to be used in the measure-ment are seletected. When positioning the probes in a gridpattern, the software allows the spatial position of eachprobe, as well as the traversing step of the grid, to bedefined. In the graphical presentation of results, a warningindication is shown in the positions where the air velocity ortemperature exceeds a user-defined level. The softwareperforms linearization of air velocity and temperatureinputs, calculation of statistical values and presentation ofresults in a table, graphical plot and as an Excel-compatible file. All air velocity probes are temperature compensated andduring calibration they are referenced to standard atmos-pheric pressure 101,325 kPa. To make a further improve-ment of the accuracy the velocity readings can be com-pensated by user input of currrent barometric pressure andrelative humidity. A 3D contour plot gives direct and intui-tive perception of the measured data, as well as to identifyproblematic zones. The operator can zoom, rotate andarrange all 3 planes individually and even run an animationof the 3 planes. Calculated statistical values include:• Mean air velocity and temperature• Standard deviation of air velocity• Turbulence intensity• Draught rate according to ISO 7730• Predicted Mean Vote - PMV• Predicted Percentage Dissatisfied - PPD• Mean Radiant TemperatureThe cablesA great deal of effort has gone into designing a supremeprobe cable offering excellent connectivity, flexibility androbustness. The cables are available in standard lengths of5, 10 and 20 m, and the cables can be interconnected if ameasurement set-up involves longer distances.ComfortSense Product Information Technical specificationsAnemometer channels up to 16Output channels 2 (monitoring channel 1 & 2)Interface USB 2.0Built-in A/D converter, 16 bit, 250 kS/sVelocity range 0.05-5 m/s, indicates up to 10 m/sAccuracy 0-1 m/s: ± 2% OR* ± 0.02 m/s1-5 m/s: ± 5% OR*5-10 m/s: ±10% OR*Time constant < 0.1 sFrequency response (90%) 2 HzAcceptance angle - relative to probe axis 0-1 m/s : ±160°1-5 m/s: +50° to +130°Temp. reading range -20ºC to +80°CAccuracy at velocities above0.1 m/s, radiation excluded0ºC to +45°C: ± 0.2K -20ºC to +60°C: ± 0.3K+60°C to 80°C: ± 0.5KStorage temperature -30ºC to +80°C 54N90 ComfortSense main frame54T33 Draft probeVelocity range 0.1 - 30 m/sAccuracy 0.2 - 20 m/s: ± 2% OR* ± 0.02 m/s20 - 30 m/s: ± 5% OR*Time constant - velocity Typically 2-3 sec.Time constant - temperature Typically 4-5 sec.Temperature compensationerror on velocity, in the tem-perature range 0ºC to 45ºCless than 0.2% of reading per 1°Cchange in air temperatureTemperature reading range -20ºC to +80°C Accuracy at velocities above0.5 m/s, radiation excluded± 0.5K 54T35 Robust Velocity and Temperature probe4Velocity range 0.05-5 m/s, indicates up to 10 m/sAccuracy 0-1 m/s: ± 2% OR* ± 0.02 m/s1-5 m/s: ± 5% OR*5-10 m/s: ±10% OR*Time constant < 0.1 sFrequency response (90%) 2 HzAcceptance angle - relative to probe axis 0-1 m/s : ±160°1-5 m/s: +50° to +130°Temp. reading range -20ºC to +80°CAccuracy at velocities above0.35 m/s, radiation excluded0ºC to +45°C: ± 0.4K -20ºC to +60°C: ± 0.4K+60°C to 80°C: ± 0.5KStorage temperature -30ºC to +85°C 54T34 Draft probe - Manikin version54N90 ComfortSense main frame54T34 Draft probe - manikin version54T35 Robust Velocity and Temperature probe and 54T33Draft probe*) Of ReadingComfortSense Product Information 5Temperature range 0 to 45°CAccuracy From 0 to 10°C: ±0.5 KFrom 10 to 40°C: ±0.2 KFrom 40 to 45°C: ±0.5 K Dynamic response Time constant 2 minutes90% response: 7 minutes(All values established in environment with air velocity less than 0.1 m/s)Humidity range 0 - 100% RH (Relative Humidity)Accuracy From 0 to +10°C: +2% RHFrom 10 to 30°C: +1.5% RHFrom 30 to 45°C: +2% RHDynamic response Time constant 10 minutes.90% response: 30 minutes(when air velocity less 0.1 m/s)Stability. Typical values in normal air.Drift less than 1% RH per yearand 0.1 K per yearOperative temperature probe - 54T38Humidity and Air temperature measuring probe - 54T3754T38 Operative temperature probe54T37 Humidity and Air temperature measuring probeTransport casesThe standard transport case is included in the deliveryof the ComfortSense system. The transport case forcables is optional.54T71 Transport case for cablesComfortSense Application SoftwareFlow & Temperature Solution 54S60Thermal Comfort Solution with calcula-tion of the PMV and PPD indices54S61 Software Update Agreement forComfortSense application software54S62LabView toolbox ComfortSense 54S63Additional license for ComfortSensesoftware54S64ComfortSense Product Information 54T25 Mounting tripodUniversal tripod for mounting 3 probes at differentheights.The tripod maximum height is 185 cm.Extra probe holder: item no. 54T232654T25 Mounting tripod and probe holder.ComfortSense Battery unit.AccessoriesComfortSense frame with input modules.ComfortSense Frame with input modulesCustom OEM probes can now be added to the ProbeLibrary using a custom calibration file in XML. Thisallows for integration of any standard OEM probe intothe system. Including advanced linearization and calcu-lation between probe channels. One input channel fortwo custom probes type 54N94.ComfortSense Battery - unit A battery unit for your ComfortSense system can comehandy in many applications, where you will need theextra mobility, where the power is not accessible or inhazardous areas. Item no. 14172S01Additional informationFor additional information please contact the DantecDynamics representative in your country. A list of currentrepresentatives is available on Dantec Dynamics’ website:www.dantecdynamics.com Dantec Dynamics undertakes a continuous and intensiveproduct development programme to ensure that its instru-ments perform to the highest technical standards. As aresult the specifications in this document are subject tochange without notice.Publication No.: 264_v11Dantec Dynamics, a Nova Instruments company7Upgradable probes - 54R10Upgradable probe - 54T21.Compatibility with the 54R10 and the 54T21 probesCurrent users of the 54R10 and the 54T21 probes have aunique opportunity to protect their investment and at thesame time upgrade their electronics to a modern platformwith a powerful application software. Upgrade of older types of Draught probesThe 54R10 and 54T21 probes can be upgraded forComfortSense including a recalibration 0,05 to 5 m/s.ComfortSense Product Information Probe cablesThe cables are available in lengths of 5, 10 and 20 m.Cables can be interconnected for applications requiringvery long cable lengths. Special cable lengths are availableon request. Protective cages for 54T34 Draught probeThe 54T34 Draught probe - manikin version - will asstandard be delivered with a new designed protectivecage. It can also be purchased separately as spare part- type no. 54T41, or the larger one type no. 54T216.Probe cables in lengths of 5,10 and 20m.Protective cages for manikin probes.