RSE3030 – Mine Ventilation | 1
INTRODUCTION
Ventilation measurements are needed to ensure effective, efficient and economic ventilation.
They include:
Air velocity and quantity
Ventilation pressures
Air quality (including temperature and gas concentrations)
Ventilation surveys are needed for planning improvements and changes as well as spot
checks to assess system status. They are also needed to check, confirm or co
ect the results
of calculations of pressure losses.
AGENDA
The agenda for this lab is to conduct a survey of the pressure and velocity/quantity for the
ventilation rig. Measurements will be collected to determine the velocity and quantity of air
entering the ventilation rig as well as the pressure drop along the rig.
In writing your report, you will need to compare calculations of the expected pressure drop with
the measurements collected from the survey.
Data will be collected at fan pressures of:
500 Pa then
750 Pa then
250 Pa.
(This will involve adjusting the fan knob, record the voltage and amperage when set – this
could be helpful when thinking about the fan curve later)
RSE 3030 Mine Ventilation – Lab 2– Pressure-Velocity/Quantity Survey 2019
RSE3030 – Mine Ventilation | 2
Measurements:
Fan pressure (Dwyer series 475 Mark III Handheld Digital Manometer)
Dry bulb and wet bulb temperature as well as barometric pressure.*
Anemometer - measure the air velocity into the rig.
The Pitot tube (TSI Airflow PVM620 micro-manometer) - measurements at multiple rig
locations.
Trailing hose pressure differences (tubes and TSI Airflow TA-465P multi-function
anemometer)
* Needed to calculated true density of air
dry airwate
wet air water dry ai
water dry air water dry ai
nn
M M M
n n n n
a ai
d
1p m
RT v
RSE 3030 Mine Ventilation – Lab 2– Pressure-Velocity/Quantity Survey 2019
RSE3030 – Mine Ventilation | 3
REPORT FORMAT
Introduction – 5
o Briefly summarise report and
iefly cover background information
Objective – 10
o Be sure to include initial thoughts on what the result may/ should be, a
hypothesis if you will.
Instruments – 5
o What did you use over the course of the lab, be specific?
o Instrument manufactures, models, ranges and uncertainties
Procedure – 5
o What steps did you follow/ implement to complete the lab measurements?
o Could I repeat the lab again in a year given what I have written down?
Data collected – 10
o Just a
ief presentation/ discussion of the data collected
o Describe what is shown in the tables/figures
Data Analysis – 30
o What does the data mean? The basic point
o Here is where you will perform the needed calculations, either in whole or as a
sample and present averages.
o What are the uncertainties in the measurements – how do they affect calculated
values?
Conclusions – 30
o Did the "experiment meet the hypothesis? If not Why not?
o What are some possible sources of e
or (if any)?
References/ Appendix – 5
o Are all references included with enough information to find the reference and
formatted appropriately?
o Are the appendix materials adequately labelled and detailed?
Table 1 Distance of each measurement point to the fan
Measurement point Distance to fan (m) Duct diameter (m)
SP3 0.2
0.2
SP5 4.36
SP6 6.96
SP7 9.82
SP8 11.32
SP9 14.4
0.16 SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP14 22.3
SP15 24.9
SP16 26.9
VP1 2
0.2 VP2 5.06
VP3 11.67
VP4 15.57
0.16
VP5 20.28
Table 2 Psychrometric properties of air in the lab room
Dry-bulb temperature （°C） Wet-bulb temperature (°C) Barometric pressure (kPa)
XXXXXXXXXX
Table 3 Setting of different fan pressure and measured air velocity by vane anemometer
Fan pressure (Pa XXXXXXXXXX
Velocity measured at
fan (m/s)
XXXXXXXXXX
Table 4 Static pressure measured at each point under different fan pressure conditions
Measurement point
Fan pressure (Pa)
XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
SP XXXXXXXXXX
Table 5 Velocity pressure measured at each point under different fan pressure conditions
Measurement point
Fan pressure (Pa)
XXXXXXXXXX
VP XXXXXXXXXX
VP XXXXXXXXXX
VP XXXXXXXXXX
VP XXXXXXXXXX
VP XXXXXXXXXX
Anemomete
Pitot tube
Acrobat Distiller, Job 3
P.A. HILTON LTD.
EXPERIMENTAL
OPERATING
AND
MAINTENANCE MANUAL
VENTILATION TRAINER
B500
B500M/E/2/003
JAN 96
(i)
POLICY STATEMENT
After Sales Service
We, P.A. Hilton Ltd., attach considerable importance in being able to retain the confidence and goodwill
of our clients in offering an effective after sales service. Every effort is made to answer clients
co
espondence promptly and to provide a rapid follow up of spares and replacement parts by maintaining
comprehensive stocks of components usually available ex-stock.
Should our clients encounter any difficulty in operating or maintaining a Hilton product we would ask that
as a first step they contact the Hilton representative in their country or, in the absence of a local
epresentative, write direct to P.A. Hilton Ltd.
In the extreme case a problem may arise in the operation of equipment which could seriously disrupt a
teaching or research schedule. In such circumstances rapid advice from the manufacturers is desirable and
we wish our clients to know that Hiltons' will accept from them a transfer charge telephone call from
anywhere in the world.
We ask our clients to treat this service as an emergency service only and to use it sparingly and wisely.
Please do be aware of the time differences that may exist and, before making a telephone call, make notes
of the problem you wish to describe. English is a prefe
ed language. Our telephone number is "Romsey
XXXXXXXXXX" and the telephone is normally manned between 0800 and 1700 hrs GMT every day.
Advance notice of an impending telephone call by Fax would be appreciated.
Each product manufactured by P.A. Hilton Ltd., is tested under operating conditions in our permanent
installations before despatch. Visitors to Horse
idge Mill are encouraged to operate and evaluate our
equipment with initial guidance from a Hilton engineer.
(ii)
INDEX
Page
SCHEMATIC DIAGRAM - Part 1 1
- Part 2 2
- Part 3 3
NOMENCLATURE 4
INTRODUCTION 5
INSTALLATION AND COMMISSIONING 5
Assembly Procedure 5
Optional Extras 9
Line or Branch Configuration 9
Line Balancing Configuration 10
Branch Configuration (Standard) 11
Assembly of the Air Supply Units 11
Work Station Desk 12
Manometer and Hand Held Anemometer 13
SPECIFICATION 14
Instrumentation 14
Safety 14
Services Required 15
Dimensions 15
DESCRIPTION 16
OPERATION 17
Procedure 17
Measuring Instruments 17
Static Pressure Tapping Points 18
MAINTENANCE 19
Testing and Resetting the RCCB 19
(iii)
Cleaning 19
THEORETICAL ANALYSIS 20
The Energy Balance in a System 20
Mass Balance 23
Velocity Pressure 23
Determination of Component and Total System Pressure Loss 25
Fan Characteristics 28
Balancing of the Complete Airflow System 30
Useful Data 30
EXPERIMENTAL PROCEDURE 31
EXPERIMENTAL CAPABILITIES 31
1. Examination of typical components, fa
ication,installation and assembly techniques used
in air handling systems. 32
2. Investigation of pressure losses in bends,
anches, changes of section and over straight
lengths of duct, together with the variation of pressure drop with air velocity. 36
3. Determination of the k factor for the pressure loss of components in various configurations. 41
4. Examination of standard types of panel and bag filters and their pressure drop against face velocity. 43
5. Investigation of the fan pressure and volume flow characteristics at various supply voltages. 47
6. Measurement of air flow rate using pitot static traverse, orifice pressure differential
and anemometer methods. 50
7. Balancing of air flow distribution in a series of
anch system using either main damper
of fan speed control for final volume flow setting. 55
WIRING DIAGRAM - 240V 63
110V 64
REFERENCES 65
1
2
3
3
4
NOMENCLATURE
Symbol XXXXXXXXXXQuantity Unit
A Area m²
d Diameter m
f Dimensionless Coefficient of Friction -
g Acceleration Due to Gravity m s-²
H Pressure Head in m of fluid m
k Pressure Loss Coefficient (a constant) -
l Length m
m Mass kg
p Static Pressure N m-²
Q Volume Flow Rate of Air m³ s-1