Cooling Energy (BTU) Metering

Kamstrup Middle East FZCPO BOX 73030DubaiUnited Arab Emirates

Jarmo HeikkinenGeneral ManagerTel:+971 4 4537337E-mail: jjh@kamstrup.com

www.kamstrup.com

Why to use individual metering?

BTU meters cost money (additional cost to my project)BTU meters are not mandatory (I can proceed without meters)Using BTU meters brings me extra work (I need to create tariff structure)Somebody needs to operate the BTU meter system (extra personnel)

Why to use individual metering?

Linked houses - Owner-occupied houseEnergy consumption for heating and hot tap water

0

5

10

15

20

1991 1992 1993 1994 1995 1996 1997 1998 1999 2000

Fig. 1

MW

h/10

0m2

Platanparken, Individual metering 1991-00Elmehusene, Individual metering from 07.95

Why to use individual metering?

050

100150200250300350400

1970197519801985199019952000

Area - mill. M2

Energy - PJ

Denmark’s Energy Consumption on room-heating including housing area in mill. m2

Why to use individual metering?

BTU meters save money•

30% less energy consumption according to experience from real life in Europe

BTU meters save energy•

30% less cooling power capacity investment

Using BTU meters enable fair billing•

everyone pay for what they really decide to consume

•

1oC ~ 5% energy use !

BTU meter system detects failures in the cooling system

•

leakages of water

•

leakages of energy

•

low delta T indication

BTU Meters give confidence to own consumption

•

according to studies made in the UAE customers want to have their own meter

Actual consumption data provides valuable feed back to used design recommendationsAutomatic Meter Reading system enables effective meter reading with minimum personnel

•

exact monthly reading provides accurate statistics (+/-

1½

day = 10% in monthly reading!)

•

tenant is moving in/out•

tenant is asking help for his problems

Why to use individual metering?

Thermal Energy Meter (BTU Meter)

Return sensor

Con

sum

er

Calculator

Supply sensor Flow meter

Chi

lled

Wat

er

Supp

lier

Thermal Energy Meter’s Accuracy

ΔΘ

= temperature difference between supply and return lines

qp

= permanent (nominal) flow

q = actual flow

-> Accuracy of a meter is not constant but depending on:

1.

Temperature difference of application (Bigger temperature difference gives better accuracy)

2.

Sizing of the flow meter (Smaller meter gives better accuracy)

Mechanical MetersRotating impeller inside the flow meter

Static MetersUltrasonic, based on ultrasoundMagnetic Inductive, based on magnetic inductionOscillator, based on water oscillation in flow channel

Advantages of modern meters

Operating Principles

1 1

2 2

BdUq

dvqvdBU

4

4/2

⋅⋅=

⋅⋅=

⋅⋅=

π

π

t

Δ t

∫ ⋅Δ⋅⋅=2

1

t

t

dtqkE θ

Energy = V x ΔΘ

x k.

Static Meter’s Benefits over Mechanical MetersMeasuring ratio 1:200 i.e. Max flow is 200 times bigger than min flow (1:50 for mechanical meters)High accuracy on wide measuring areaInherent to pressure shocksLimited maintenance needLong life time

Ultrasonic Meter’s Benefits over Magnetic Inductive MetersNot sensitive for Fe-related impuritiesKeep high accuracy in real applications (including impurities in water) longer time without maintenance

Advantages of modern meters

World Market for Thermal Energy Meters

Year 1990 2000 2010

Total 800 000 1 000 000 1 200 000

Mechanical 740 000 750 000 650 000

Static 60 000 250 000 550 000

Magn. inductive 28 000 20 000 15 000

Oscillator 2 000 10 000 5 000

Ultrasonic 30 000 220 000 530 000

Kamstrup UltraFlow

5 000 130 000 275 000

Automatic Meter Reading M-Bus

AMR SoftwareM-Bus Master

Tenant Bills

10th Floor

9th Floor

8th Floor

7th Floor

6th Floor

5th Floor

3rd Floor

2nd Floor

1st Floor

Ground

Floor

Bldg. 10 Floors -

120 BTU MetersBldg. 10 Floors -

120 BTU Meters

BMS

Large BTU Meter AMR system

AMR SoftwareTenant

Bills

Administration Office

M-Bus

MasterRS 232/

TCP.IP Gateway

Bldg. ZBldg. Z

Energy Meters

Bldg. YBldg. Y

Energy Meters

Bldg. XBldg. X

Energy Meters

Bldg. QBldg. Q

Energy Meters

WWWTCP/IP

AMR External RF Routers

M1 M4 M5 M6M2 M3

C1

R3

R2

R1

M7 M8 M9 M10

R4

R5

GSM

GSM

Rx

Cx

Mx

RF Concentrator

RF Router

Meter + RF Module

Local

list R1

Net list C1+R1+2+3+

4+5

Kamstrup AMR

Local

list C1

Energy Utility

Energy Utility

Local

list R2

Local

list R3

Local

list R4

Local

list R5

USB Meter Reader

A simple way of wireless meter reading

A complete wireless meter reader put inside a USB stick reading consumption values for cooling, heat, water and electricity

A power pack or any other USB charger supplies the USB Reader with operational power

Meter data automatically from meters into the USB meter reader stick

Meter data automatically from the USM meter reader stick into the PC

Competitive pricing

Customer segments

Individual (tower) buildings

Small utilities for heat / cooling

Caravan parks

Shopping malls USB Reader with power pack

Very small AMR systems

Three examples

Or you can read the meter by means of a USB Reader with Power Pack and transfer the data from the USB Reader with Power Pack to the PC program via another USB Reader which is permanently mounted in the PC.

2.

You can either read the meter by means of a USB Reader with Power Pack and transfer the data to the PC program by moving the USB Reader from the Power Pack to the PC.

1.

Meter reading via USB Meter Reader and Power Pack.

Transmission of data to the PC program via USB Meter Reader.3.

Data processing in other programs

•

Billing

• Analysi

s

• Energy optimizatio

n• Calculation

Data processing in other programs

• Billing

•

Analysis

•

Energy optimization

•

Calculation

Meter

Meter

MeterPC

PCUSB Meter ReaderUSB Meter Reader

USB Meter Reader

PCUSB Meter Reader

USB Meter Reader

Kamstrup ProductsMeters:

coolingheatwaterelectricitygas

AMR HWModules (M-BUS, Radio, LON, RS232..)Masters & ConcentratorsModemsTCP/IP Gateways

AMR SW PC Base SuiteEMS10Senea

Meter Reading ServicesKamstrup can operate the AMR systemfor our customers

Questions