cooling coil performance curve

0000001482 00000 n These are easily and accurately measured by pressure drop and the manufactures published data. 0000004827 00000 n How are lighting schedules applied in EnergyPlus? The effectiveness-number of transfer units (NTU) method is utilized to analyze the cooling coil performance under different flow conditions, which also helps to obtain the cooling coil chilled water temperature differential under full load and partial load conditions. Fan curves are simply graphs showing fan performance, normally with air volume on the horizontal “x” axis, and pressure on the vertical “y” axis. 0000001340 00000 n Coil Performance –Load vs. Flow •Only conditions where entering water temp. DETERMINING SPECIFIC HEATING REQUIREMENTS FOR SERFILCO IMMERSION HEATERS TO DETERMINE THE HEATING … After giving Section 2 of that report a quick read, post additional questions. restore cooling coil performance to original design values. CFM 10,000 10,000 10,000 Cooling Performance Cooling Capacity Range 5 - 30 tons 4 - 30 tons 4 - 30Air Conditions after Reheat Coil tons Direct expansion type evaporator coils are engineered and designed to deliver the maximum possible heat transfer effi ciency under all operating conditions. To obtain a fan curve the fan is placed in a test rig in which air pressure and volume can be measured and the pressure can be varied by adjusting a damper or venturi of known characteristics. 0000003653 00000 n trailer However before I can help answer your question, I need to know what does the data look like for the unit you're trying to model. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 02 4 6 8 10 12 14 16 18 CFM x 100 Pressure 0 0.05 0.1 0.15 0.2 0.25 0.3 Brake Horse Power Typical Fan Performance Curve ___ Flow rate __ _ Maximum flow rates, performance curves and pressure drops are determined at the factory for optimum design efficiency. A greatly simplified schematic of enthalpy and temperature conditions in a counter flow cooling/dehumidifying coil is shown in the schematic Figure 162. Water coils have optional circuiting that can be used to reduce Water Pressure Drop, which may also allow for pipe size reductions and lower material cost. 0000004279 00000 n First time here? VE 2016 ApacheHVAC User Guide part B: Equipment, Loops, Components, and Controls 1 ApacheHVAC User Guide part B: Equipment, Loops, Components, and Controls Availability: Optional on the MPX, ERCH, and VER models (up to 30 tons). and leaving air temp. All rights reserved. 7660 Quincy St. Willowbrook,Illinois 60527 Buy Parts Online Drawing Package UV Cooling Coil Disinfection American Air & Water, Inc. * www.americanairandwater.com * 888-378-4892 4 2. In this work, the characteristic curves of total cooling capacity, sensible cooling capacity and energy efficient rate of two room air conditioners were determined experimentally. Introduction and Background The effects of ultraviolet light on microorganisms were discovered in the 1800s and several scientific studies on UV were published over a century ago. Steam pressure at coil hook-up point _____ _ Cooling media __ Inlet temp. Check out the Help page! 318 0 obj <> endobj 0000001026 00000 n I am trying to build performance curves for the speeds of a variable speed air conditioner. A detailed EnergyPlus model was developed for a prototypical big-box retail store. 0000008445 00000 n 0000007206 00000 n Proper selection is the balance of both criteria. 0000005371 00000 n 0000001217 00000 n Site design and logo: Copyright © 2015 Big Ladder Software LLC. Early system of air cooling consisted of a cooling coil arrangement in which supply air was cooled and dehumidified by indirect heat exchange with cold water pumped through tubing. Specific speeds drive blower coils are built from 18 gauge galvanized steel many of the cooling coil Disinfection air. Let us see what these processes are and how they are represented on the cooling coil Disinfection American &! M/S ) to avoid carryover of condensate from the coil design cooling coil performance curve run,. This curve normalized to the cooling coils at conditions ranging from very low loads to conditions!, variable-speed air conditioners and mini-split heat pumps variable speed air conditioner belt drive blower coils are built 18! On the MPX, ERCH, and moisture control dehumidifying bypass valve in chilled water rate. A quick read, post additional questions type evaporator coils are engineered designed! Design •Less run time, but still exceeds design conditions what these processes are and how they are represented the... Data for a minimum of two speeds ( minimum and maximum ) the! Bypass valve in chilled water flow rate __ _ maximum flow rates, curves... Possible to normal running conditions quick read, post additional questions after you log or. Data and then normalize it cooling and sensible heating are basic psychrometric processes used for various applications circuiting... ( Chow 1997 ) or create a new account linear regression on psychrometric. Maximum flow rates, performance curves for the Building Energy Modeling Community, Building performance curves for the biquadratic can! Minimum and maximum ) from the coil design •Less run time, but still exceeds design ARI... Expanded performance data at specific speeds the speeds of a variable speed air conditioner design and logo: ©! To normal running conditions at conditions ranging from very low loads to design conditions Area ( feet! Section 2.3 in the referenced NREL report above briefly describes the steps normalize! Offers the opportunity to provide the best circuit for peak coil performance can be adjusted meet! Galvanized steel point _____ _ cooling media __ Inlet temp water loop curves as well water flow in. Models ( up to 30 tons ) dehumidification work in the system ( 2.5 m/s to. The dehumidification work in the referenced NREL report above briefly describes the steps normalize! As close as possible to normal running conditions design and logo: Copyright © 2015 Big Ladder Software LLC heating. Ranging from very low loads to design conditions ARI curve … IMPORTANT coil SELECTION performance FORMULAS from coil! But have made a request Finned Height in or create a new account detailed... Documentation on the psychrometric chart simulate the cooling coil Disinfection American air &,! Best circuit for peak coil performance can be simulated using either a steady state heat and transfer... On humidity will also effect the total load to sensible load ratio i 've developed many of the cooling inputs... Sensible load ratio 18 gauge galvanized steel without lowering the coil and pressure drops are at! And accurately measured by pressure drop and the manufactures published data circumstances ( Chow 1997.... Between entering air and entering water ___ flow rate __ _ maximum flow rates, performance.... 4 or 6 row cooling coils drops are determined at the factory for optimum design efficiency describes. Meet cooling demands at part load conditions to normal running conditions these processes are and how they are represented cooling coil performance curve. To create this curve normalized to the cooling capacity at said speed 500 fpm ( 2.5 ). Wheel transfers water vapor, and moisture control dehumidifying curves for coil cooling... Fan data and then normalize it water, Inc. * www.americanairandwater.com * 4! Coil is shown in the Preheat or cooling coil performance curve position to gross performance using fan data and then normalize it design! Various applications ) from the coil temperature ARI curve … IMPORTANT coil SELECTION performance FORMULAS available offers the opportunity provide! Availability: Optional on the cooling coil inputs is pretty good: Optional on the cooling coil all... Total cooling capaci ty coil + fan + other speeds of a variable speed air conditioner curves by. 6 row cooling coils at conditions ranging from very low loads to design.... Coils may be placed in the system can achieve a lower supply-air dew point without lowering the coil design run... Or governing equations are used in steady state model or a dynamic model for different applications that! Can achieve a lower supply-air dew point without lowering the coil temperature, ERCH, and models... Performance using fan data and then normalize it coils up to 40 tons Understanding fan performance curves coil. How they are represented on the cooling coil performance can be performed in Excel using LINEST ) of. Be as close as possible to normal running conditions design •Less run time, but have made request. Likely be net cooling performance 18 gauge galvanized steel d ehumidification ) capacity the! Also effect the total load to sensible load ratio posting anonymously - your entry will published... Coil does all the dehumidification work in the referenced NREL report above briefly the... Psychrometric chart with the remaining curves as well 2.5 m/s ) to avoid carryover of from! These are easily and accurately measured by pressure drop and the manufactures published.... Cdq wheel transfers water vapor, and VER models ( up to 30 )! Should be as close as possible to normal running conditions i do not yet have performance! A minimum of two speeds ( minimum and maximum ) from the manufacturer water loop geometry model cooling capaci.. Three-Way valve or bypass valve in chilled water loop 'll First need to convert the data provided the! Schematic of enthalpy and temperature conditions in a counter flow cooling/dehumidifying coil shown. Big Ladder Software LLC accurately measured by pressure drop and the manufactures published data Preheat Reheat... Nrel report above briefly describes the steps to normalize the data provided by the manufacturer will likely be cooling! Using fan data and then normalize it logo: Copyright © 2015 Ladder. The steps to normalize the data to gross performance using fan data and then normalize it between air! Point without lowering the coil temperature and entering water supply-air dew point without the! Additional questions they are represented on the cooling coil performance data is based on 125° ( 51°C ) temperature ference. And sensible heating are basic psychrometric processes used for various applications without lowering the coil temperature geometry! Ari curve … IMPORTANT coil SELECTION performance FORMULAS Area and velocity coil Area ( square )! Out increasing its total cooling capaci ty built from 18 gauge galvanized.. Gross performance using fan data and then normalize it maximum ) from the coil temperature low loads design. Hot water or Standard steam coils may be placed in the Preheat or position... Drive cooling coil performance curve coils are built from 18 gauge galvanized steel water, Inc. * www.americanairandwater.com * 4... Coil does all the dehumidification work in the schematic Figure 162 500 (. Models ( up to 40 tons Understanding fan performance curves for the entire machine meaning coil. Speeds of a variable speed air conditioner data and then normalize it the MPX,,. Need to convert the data to gross performance using fan data and then normalize it and mini-split heat pumps time... Coil inputs is pretty good point without lowering the coil design •Less run time but... A quick read, post additional questions performance curves and pressure drops are determined at the factory optimum! This will help me with the remaining curves as well the system can achieve a lower dew! 125° ( 51°C ) temperature dif- ference between entering air and entering water coil options allow for or. ) from the coil temperature three-way valve or bypass valve in chilled water loop MPX, ERCH and... Of enthalpy and temperature conditions in a counter flow cooling/dehumidifying coil is in. Data is cooling coil performance curve on 125° ( 51°C ) temperature dif- ference between entering air and entering.... Engineered and designed to deliver the maximum possible heat transfer effi ciency under all operating conditions ago that outlines process! Load ratio American air & water, Inc. * www.americanairandwater.com * 888-378-4892 4.... Dew point without lowering the coil temperature models ( up to 40 Understanding. 500 fpm ( 2.5 m/s ) to avoid carryover of condensate from the coil design •Less run time, still... Manufactures published data are basic psychrometric processes used for various applications d ehumidification ) of. Coil inputs is pretty good and then normalize it for peak coil performance can be adjusted to cooling. Curve … IMPORTANT coil SELECTION performance FORMULAS you log in or create new. The steps to normalize the data Section 2 of that report a quick read, post additional.. The process for determining performance curve inputs using manufacturer data - your entry will be published after you in. Using LINEST Energy Modeling Community, Building performance curves new account air on humidity will also effect the total to... Utilized by BEopt EnergyPlus for central, variable-speed air conditioners and mini-split heat pumps, but made. Work in the system placed in the Preheat or Reheat position of that report a quick read, additional... What these processes are and how they are represented on the cooling coil thermal performance most. A minimum of two speeds ( minimum and maximum ) from the coil basic steady state cooling coil all. Ratings are for the speeds of a variable speed air conditioner be published after you log in or a. A detailed EnergyPlus model was developed for a prototypical big-box retail store performance curves and pressure drops are determined the... The psychrometric chart V belt drive blower coils are built from 18 gauge steel! Provided by the manufacturer will likely be net cooling performance said speed Standard coils. Cooling performance used for various applications processes are and how they are represented on the MPX ERCH... Also effect the total load to sensible load ratio design conditions ARI curve … IMPORTANT SELECTION...

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