HI

[roberts]

Helo to everyone. I have just become Gas Safe register. What a relief.
I have got a question: how to calculate hourly and annual gas load for property? Need it for new gas connection application.
Many thanks
Robert

 

[newbie1]

Helo to everyone. I have just become Gas Safe register. What a relief.
I have got a question: how to calculate hourly and annual gas load for property? Need it for new gas connection application.
Many thanks
Robert

sorry robert your not really making any sense

 

[roberts]

Need to fill in form for new gas connection to property, They ask for hourly peek load and annual gas load. I undrestood that for hourly one i can add appliances together, but what about annual one.
Robert

 

[quality]

Hi
Is this for a large property or a 3 bed semi ?

 

[roberts]

2 bed flat

 

[quality]

I really cannot see why any supplier would need to know this as its just a domestic property presumabley

 

[Kip]

just write "abit" in the box, should be enough.

 

[kirkgas]

try this for starters




BS 6400-1:2006​

36​

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​

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• © BSI 2006​

[FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]

Annex A (normative)​

[/FONT]​

[/FONT][FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]Sizing of meters​

[/FONT][/FONT][FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]

A.1​

[/FONT]​

[/FONT][FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]Diversity factor​

[/FONT][/FONT]

A diversity factor is given to each type of appliance according to the
normal degree of intermittence of use. Where there is only one or two
appliances (e.g. combination boiler and cooker) the diversity factor
shall have a value of one. Where there are more than two appliances the
diversity factors listed in Table A.1 shall be used.​

[FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]

A.2​

[/FONT]​

[/FONT][FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]Meter size calculation​

[/FONT][/FONT]

To calculate the size of meter required, multiply the maximum heat
input of each appliance by its diversity factor, add these figures, convert
to megajoules, and divide the total by the calorific value of the gas
(typically 39 MJ/m​

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​

​

3 for 2nd family gas). The following is an example of
such a calculation.
Table A.1 [FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]Diversity factors of appliances for meter sizing​

[/FONT][/FONT][FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]

Appliance Diversity factor​

[/FONT][/FONT]

Central heating appliances (other than
combination boilers)
1
Unit heaters 1
Circulators 1
Combination boilers 0.8
Instantaneous water heaters 0.8
Sink water heaters 0.6
Room heaters 0.6
Tumble dryers 0.6
Hotplates 0.6
Ovens 0.6
Cookers 0.4
Refrigerators 0​

[FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]

Type of appliance Heat input (kW) Diversity factor Gas load (kW)​

[/FONT][/FONT]

Central heating boiler 30.0 × 1.0 = 30.0
Room heater 6.0 × 0.6 = 3.6
Tumble dryer 3.0 × 0.6 = 1.8
Cooker 23.5 × 0.4 = 9.4
Total gas load = 44.8 kW
Convert to MJ/h (1 kW = 3.6 MJ) = 161.3 MJ/h
Equivalent gas flow rate = 4.2 m​

​

​

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3/h​

[FONT=CentITCBkBT,Bold][FONT=CentITCBkBT,Bold]

Conclusion​

[/FONT][/FONT]Select a meter with a maximum capacity of 6 m3/h.

 

[roberts]

Thanks for help