In This PPT we are discussed about complete details of that product (Use,Operation, Technical details, Dimensions, Wiring, and etc..)
Please Support us and Follow our other Sites
https://automationtechplc2.blogspot.com
https://humidificationcontrol.blogspot.com
https://controlsandsystems.business.site
If you enjoyed this article, share it with your friends and colleagues
Assessment of the natural air ventilation of buildings in urban area with the...Stephane Meteodyn
Nowadays, a lot of energy is spent for air-conditioning in the cities for offices and private-housing. A good knowledge of the urban climatology around the buildings allows using the wind for natural air ventilation. A combined approach based on a Computational fluid dynamics code (CFD) that models the wind in urban environment and on air network tool was developed to assess quickly the natural ventilation of buildings in urban area. The aerodynamic tool is a CFD-Network software named "UrbaWind which performs calculation of the outdoor wind combined with a macroscopic network method for the evaluation of the mass flow rates through the openings. Results depend on the external wind conditions, taking into account the local wind climatology.
Giving the influence of the shape and the disposition of the buildings on the wind behaviors, CFD software solves the equations of fluid mechanics with a specific model which allows taking into account the urban environment effects such as vortexes, venturi or wise effects etc…. Finally, the software is able to compute the air mass flow rate inside each internal volume depending on the opening's behaviors attached to the wall building.
The mass flow rates across air inlets and openings, as well as the pressure fields on the building envelope are computed for every wind incidence, considering a wind reference velocity. The local climatology is introduced to deliver statistical data useful to assess the energy consumption and the thermal comfort (air exchange rate, indoor velocity).
Through many architectural and urban design projects, Meteodyn will introduce during this session the characteristics of the software UrbaWind and the results delivered to the design teams.
In This PPT we are discussed about complete details of that product (Use,Operation, Technical details, Dimensions, Wiring, and etc..)
Please Support us and Follow our other Sites
https://automationtechplc2.blogspot.com
https://humidificationcontrol.blogspot.com
https://controlsandsystems.business.site
If you enjoyed this article, share it with your friends and colleagues
Assessment of the natural air ventilation of buildings in urban area with the...Stephane Meteodyn
Nowadays, a lot of energy is spent for air-conditioning in the cities for offices and private-housing. A good knowledge of the urban climatology around the buildings allows using the wind for natural air ventilation. A combined approach based on a Computational fluid dynamics code (CFD) that models the wind in urban environment and on air network tool was developed to assess quickly the natural ventilation of buildings in urban area. The aerodynamic tool is a CFD-Network software named "UrbaWind which performs calculation of the outdoor wind combined with a macroscopic network method for the evaluation of the mass flow rates through the openings. Results depend on the external wind conditions, taking into account the local wind climatology.
Giving the influence of the shape and the disposition of the buildings on the wind behaviors, CFD software solves the equations of fluid mechanics with a specific model which allows taking into account the urban environment effects such as vortexes, venturi or wise effects etc…. Finally, the software is able to compute the air mass flow rate inside each internal volume depending on the opening's behaviors attached to the wall building.
The mass flow rates across air inlets and openings, as well as the pressure fields on the building envelope are computed for every wind incidence, considering a wind reference velocity. The local climatology is introduced to deliver statistical data useful to assess the energy consumption and the thermal comfort (air exchange rate, indoor velocity).
Through many architectural and urban design projects, Meteodyn will introduce during this session the characteristics of the software UrbaWind and the results delivered to the design teams.
The presentation was on final year design project, "Production of LPG from NGLs and condensate". It includes process selection, establishing a flow diagram for the selected process, the sizing of main equipments, detailed design of four Major equipments along with P & ID control for the systems and finally the economic evaluation was conducted to check the feasibility of the process. The final product composition of LPG was simulated using Aspen HYSYS and found to be 49% Propane and 21% butane.
CCS 120 endress+hauser datasheet-sensor for total chlorineENVIMART
CCS 120 endress+hauser datasheet-sensor for total chlorine - Endress+Hauser - Envimart JSC - www.envimart.vn - ĐT: 028 77727979 - sales@envimart.vn - Nền tảng cung cấp thiết bị, vật tư ngành nước và môi trường.
Hedland offers a complete line of over 15,000 variable area flow meters to measure oil, hydraulic oil, phosphate esters, water and water-based fluids, as well as air and other compressed gases.
Overview of the Vortex Flow Meter product range from Badger Meter including technical data. This presentation also explains vortex shedding technology.
KEMET Webinar -C44U_C44P-R Power Can Film CapacitorsIvana Ivanovska
Please find the presentation from our webinar where you can learn more about the applications where our C44U and C44P-R series can be used.
Our engineers speak about the performances of the series
The Hallikainen Model 1354 Vapour Pressure Analyser is a completely automated process stream analyser.
Its fast response and minimal maintenance requirements put the 1354 at the forefront of your vapour pressure measurement needs.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Chat application through client server management system project.pdfKamal Acharya
This project focused on creating a chatting application with communication environment. The objective of our project is to build a chatting system to facilitate the communication between two or more clients to obtain an effective channel among the clients themselves. For the application itself, this system can serve as a link to reach out for all clients. The design of the system depends on socket concept where is a software endpoint that establishes bidirectional communication between a server program and one or more client programs. Languages that will be used for the development of this system: Java Development Kit (JDK): is a development environment for building applications and components using the Java programming language.
More Related Content
Similar to Introduction into Flow Measurment Technology_2021_Dec6.pdf
The presentation was on final year design project, "Production of LPG from NGLs and condensate". It includes process selection, establishing a flow diagram for the selected process, the sizing of main equipments, detailed design of four Major equipments along with P & ID control for the systems and finally the economic evaluation was conducted to check the feasibility of the process. The final product composition of LPG was simulated using Aspen HYSYS and found to be 49% Propane and 21% butane.
CCS 120 endress+hauser datasheet-sensor for total chlorineENVIMART
CCS 120 endress+hauser datasheet-sensor for total chlorine - Endress+Hauser - Envimart JSC - www.envimart.vn - ĐT: 028 77727979 - sales@envimart.vn - Nền tảng cung cấp thiết bị, vật tư ngành nước và môi trường.
Hedland offers a complete line of over 15,000 variable area flow meters to measure oil, hydraulic oil, phosphate esters, water and water-based fluids, as well as air and other compressed gases.
Overview of the Vortex Flow Meter product range from Badger Meter including technical data. This presentation also explains vortex shedding technology.
KEMET Webinar -C44U_C44P-R Power Can Film CapacitorsIvana Ivanovska
Please find the presentation from our webinar where you can learn more about the applications where our C44U and C44P-R series can be used.
Our engineers speak about the performances of the series
The Hallikainen Model 1354 Vapour Pressure Analyser is a completely automated process stream analyser.
Its fast response and minimal maintenance requirements put the 1354 at the forefront of your vapour pressure measurement needs.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Chat application through client server management system project.pdfKamal Acharya
This project focused on creating a chatting application with communication environment. The objective of our project is to build a chatting system to facilitate the communication between two or more clients to obtain an effective channel among the clients themselves. For the application itself, this system can serve as a link to reach out for all clients. The design of the system depends on socket concept where is a software endpoint that establishes bidirectional communication between a server program and one or more client programs. Languages that will be used for the development of this system: Java Development Kit (JDK): is a development environment for building applications and components using the Java programming language.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Top 13 Famous Civil Engineering Scientistgettygaming1
List of Best Scientist Who Gives Big Contribution in Civil Engineering Filed, in this we provide how they Contribute in Civil Engineering filed, For Data Collection civilthings.com helps us a lot.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Toll tax management system project report..pdfKamal Acharya
Toll Tax Management System is a web based application that can provide all the information related to toll plazas and the passenger checks in and pays the amount, then he/she will be provided by a receipt. With this receipt he/she can leave the toll booth without waiting for any verification call.
The information would also cover registration of staff, toll plaza collection, toll plaza collection entry for vehicles, date wise report entry, Vehicle passes and passes reports b/w dates.
2. 2
Normal cubic meter (m3
n)
Gases do have a certain mass, but the density of gases is strongly dependent on pressure and temperature
Normal conditions: defines the mass of a gas at a fixed temperature and pressure.
3. 3
Normal cubic meter (m3
n)
• Volume: 1m3
• Temperature: 0°C
• Pressure: 1013,25 mbar
• Relative humidity: 0%
• Mass: 1293 gram
m3
n
4. 4
The ideal gas law
Pressure * Volume / Temperature = Constant
P∗V
T
=nm∗R
V
½ V
P
2P
5. 5
Normal conditions may vary
Other common normal conditions:
• 20˚C reference (FAD): See ISO 1217
• 15˚ reference: See DIN 1533
• CAGI: 68 F, 14.5 PSIA, 0% water vapor pressure
Nm3/hr = V ∗ (TN / T) ∗ (P / PN)
6. 6
From FAD to normal cubic meter
100 m3/hr FAD ∗ 273,16/(273,16+20) ∗ 1000/1013,25 = 91,95 Nm3/hr
FAD/Nm3 factor = 1,0874 → 8,7% difference when comparing numbers
20 deg
1000
20 deg
1000
20 deg
1013,25
20 deg
1000 0 deg
1013,25
FAD Nm3
8. 8
ThermabridgeTM technology
Vout = k ∗ λ ∗ ρ ∗ v ∗ (Ts−Tg)
• Vout = output voltage
• k = sensor (geometrical) constant
• λ = thermal conductivity of the gas
• ρ = density of the gas
• v = actual velocity in in m / sec
• Ts = sensor temperature
• Tg = gas temperature
9. 9
Normal meter per second
Thermal mass flow: velocity in Normal meter per second
Rule of thumb:
“Actual velocity times absolute pressure” (forget temperature)
Example: 8 m/sec∗ 7 bar abs ~ 56 mn/sec
10. 10
Principles compared
Thermal Vortex
DP –
Orifice plate
DP –
Cone meter
Coriolis
Turbine/
rotary
displacement
Clamp on
ultrasonic
Mass flow Yes Optional Optional Optional Yes Optional Optional
Meter run 20D 15D 15D 5D 0D 10D 20D
Pressure loss Low Medium/high high high Low Low Low
Dirty air Fouling OK Clogging Clogging Internal fouling Faillure OK
Wet Air Spikes OK, spikes OK OK, orientation Yes, but affects
reading
Faillure Spikes
Range 1:250 1:10 1:10 1:10 1:100 1:100 1:100
Accuracy 2% 2% 2% 2% 0.5 .. 1% 0.5…1 % 1%
Purchase price $ $ $ $ $$$$ $$ $$$
Maintenance Medium Low Medium Medium Low High Low
11. 11
Value of mass flow and 3-in-1
We believe in: Pressure ∗ Flow = Voltage ∗ Current – Energy!
• Flow, Pressure, Temperature combined
• ISO 11011 (e.g. must measure pressure on multiple locations)
• Difference between supply and demand
• How to detect cause of a pressure drop if you dont measure?
• Internal accounting: 7 bar is more expensive than 6 bar
• Flow & temperature to identify issues with compressed
air driers and (water) cooled compressors
12. 12
Velocity to mass flow
True diameter Measured error Measured diameter % of error
50 3 53 12.36
100 3 103 6.09
200 3 203 3.02
300 3 303 2.01
Check the inner pipe diameter
Area A = π∗ 0.25 ∗ D2
Wrong entry of D → big deviation
Example:
V = 60mn/sec
D: 50 mm → Q = 0,117 m3
n / sec
D: 54 mm → Q = 0,137 m3
n / sec
Difference: 17%
14. 14
Thermal mass flow = pressure independent
Why? The sensor counts molecules:
More pressure = denser air* = more molecules = more heat loss*
* : linear with pressure
2 x P
1 x P
1Q 2Q
15. 15
Differential pressure technology
Dynamic
pressure port
Positive side
Dynamic pressure port
Negative side
Temperature
FLOW
VPFlowScope
Transmitter housing
- Absolute pressure sensor
- Differential pressure sensor
Locking ring
16. 16
Flow range is critical
Thermal vs DP technology: 1:300 range vs 1:10 (1:5) range
Thermal:
• From leakages to high flow
• Dry air only
• Temp range up to ~60°C
DP:
• Only medium to high flow rates
• Not suitable for leakage/low flows
• Wet air and dry air
• Temp range up to ~150°C (or higher)
18. 18
Importance of bi-directional flow measurement
Demand side (reverse flow)
Tank
Production line
+1002 mn
3
+941 mn
3
- 61 mn
3
____________
+880 mn
3
Flow
Flow
POU tank
Production line
Production line
19. 19
Bi-directional flow examples
• Ring networks
• Multiple compressor rooms
• Complex (old) compressed air networks
• Large receiver tanks
• Non return valves in compressors
• Leaking drains and seals
Extremely useful information for audits and permanent installations.
20. 20
Turbulent vs laminar flow
Reynolds number
ρ∗v∗D
η
=
density∗velocity∗tubediameter
dynamic viscosity
Air dynamic viscosity = 17,1 ∗ 10 −6, which is very
small compared to water or syrup
• Compressed air lines: Flow is always turbulent!
• Turbulent: Velocity profile is nearly flat:
Less sensitive for insertion depth
22. 22
Know the basics: Process data
Key to correct measurements and to prevent damage to your flow meter
• Type of gas
• Flow range
• Humidity (dry/saturated)
• (Inner) Diameter
• Pressure
• Temperature range
23. 23
Model selection
In-line meters: 0.5, 1, 2 inch
Flow range leads direct to model,
Check the diameter to ensure quick mechanical installation.
Insertion probes: 2 inch and up
The (normalized) velocity range needs to be calculated from the flow
range to determine the right model.
Normalized velocity = mass flow [m3
n/hr] / [3600] / tuber area
24. 24
½” 1” 2” > 2”
Insertion probes
In-line meters
Size
(inch)
Min flow
m3
n/hr
Max flow
m3
n/hr
Min flow
SCFM
Max flow SCFM
½ inch 0,32 80 0.19 50
1 inch 0,88 250 0,52 150
2 inch 3,53 1000 2,06 600
Flow ranges
26. 26
Not sure? Use VPCalculator
Use our calculator to determine which flow
sensor you need.
See online Velocity Calculator
https://www.vpinstruments.com/selection-
guide/velocity/
27. 27
When creating a project quote
Gather enough information to be prepared
• P&ID (Process and Instrumentation Diagram)
• Plant map, to scale
• Pictures of installation points
• Use the on-line demand side table or Excel form
• Use bi-directional as default option
29. 29
Read the manual…
• User manual
• VP Academy
• Instruction video
• This training
• Helpdesk “how to” articles
30. 30
Check the direct environment
• Avoiding excessive external heat
• Protect against external water damage (IP)
• Eliminating excessive system condensate
• When having condensation in gas
(100% condensation → VPS DP)
• Avoid corrosive atmosphere where possible
• Use the right cables and cable locations
• Eliminate mechanical vibration and potential
danger
32. 32
Check temperature
• Thermal mass: limited range: high temperature will cause sensor signal → 0
• Temperature fluctuations: lagging temperature compensation
• Coming from cold outside → inside (audits) : allow 1 hour acclimatization for
best results.
• DP: high range, and reasonably fast response
34. 34
2. Find a straight pipe
General minimum rule:
• 20*D upstream length (even 40*D preferred)
• 5*D downstream length (10*D preferred)
The longer the better
Without conditioners:
All other claimed shorter lengths are B.S.
It’s based on physics, not technology
35. 35
3. Use the best orientation
Take into account:
• Ease of wiring, maintenance, read out of and
access to display
• Install at least at an angle of 15° upwards. ALWAYS if possible
• Piping table! Minimum up- and downstream length.
Longer = better
• In case of doubt: Communicate with the end user
30o
36. 36
Recap
• Thermal mass : dry air
• Differential pressure : wet air
• In Line : 0,5, 1 and 2 inch
• Probes : > 2 inch
• Always check : Temperature, Pressure
diameter and range
• Ring network : Bi – directional
• General : Use the checklist!
Things to avoid:
• Large and fast temperature swings
• Excessive condensate in the pipe
• Short meter runs