Minutes of the B513 Planning Meeting, 9^th May

Present: Tony Cass, Anne Funken, Jukka Lindroos, Dick Minchin, Dave Underhill

1.             B513 Air Conditioning

1.1.                Installed Capacity

1. The currently installed capacity is best summarised in the following table.

Chilled water capacity	2400kW
Less equipment overhead	550kW
Less cooling needed to counter solar heating of the machine room	210kW
Leaves available cooling capacity of	1640kW
Of which office air conditioning takes	500kW
Leaving cooling capacity for equipment areas of	1140kW

       ii.            Jukka will measure the air flow in B513 offices to determine the exact cooling requirements. These measurements should cover both the ground floor corridors and also the 1^st/2^nd floor corridors on the Jura side which are cooled by the machine room air flow.

3. Additional chilled water capacity will clearly be required to meet the LHC needs. This could be done in one of two ways.

a.       Adding an additional chiller in the cooling station. Space could be made available by removing one of the humidifiers (these are not so essential for today’s equipment.) The cost for this option was estimated at about 350KCHF after the meeting.

b.      Utilising spare chilled water capacity from the booster. This option has not been further investigated.

1.2.                Cooling Capacity Distribution

1.2.1.                       Machine Room and Barn

1. The following calculations assume the current cooling capacity after overheads (1640kW) is all used for the machine room and barn area as originally planned.

2. The airflow in the machine room is currently 680,000m³/hour. Increasing this to 765,000m³/hour (the maximum consistent with acceptable working conditions) would increase the cooling capacity to 1877kW.
3. Increasing the difference in temperature between the outgoing and incoming air by 1˚ would increase the cooling capacity to 1856kW with an airflow of 650,000m³/hour or to 2100kW for an air flow of 765,000m³/hour.
4. A mezzanine floor in B513 is not recommended. The heights of the floors would be too low to enable efficient cooling.
5. If “packing density” is increased in the mchine room through the use of taller racks then these racks must be aligned under the extraction ducts.

1.2.2.                       Vault and Motor Generator Room

1. The height of the vault limits the cooling capacity to a maximum of 500kW.
2. To provide the maximum 500kW of cooling capacity, two new units would have to be installed, each 2.9m wide by 6m long and 2.8m tall. Installation of these units would cost 600KCHF and take roughly 1 year from the go ahead by IT.
3. Additionally, carefully arranged ducting (with under floor diffusers) would be required—and thus carefully placed equipment racks.
4. It was noted that cooling capacity beyond 500kW could be installed by placing water based cooling units next to equipment racks. Such a solution, however, is likely to place too great a constraint on the placement of equipment.
5. A quote for the removal of the MG room air conditioning equipment led to the idea that the rooms that house these units might be used to house the large air conditioning units required for the vault—which would, in this case, also provide cooling for the MG room. Jukka Lindroos will investigate this option.

2.             AOB

1. Anne Funken distributed an Email from Roland Bachelard which contained estimates for the cost of the “cleanup work” required for the vault. These costs are

Removal of sprinkler and “Cray cooling” pipes from the vault	16000CHF
Transfer of chilled water pumps from the MG room and removal of associated pipework	5000CHF
Removal of MG room false floor	7500CHF
Demolition of old air conditioning units and removal of separating wall	14000CHF
Removal of wooden walls for S/421-423-425-427	3300CHF

       ii.            The last item is not required for the present. The removal of the MG room air conditioning units will depend on Jukka Lindroos’ studies (see 1.2.2.v above).

3. Anne Funken then presented initial cost estimations for replacing the Saleve side goods doors with vertically folding doors. These doors, which could be installed with minimal additional work, would cost 20K for a simple door and 30K if a personnel access door was included.
4. It was agreed that the next meeting would be held at 2pm on Tuesday 29^th May; the main topic to be the electrical distribution arrangements.

3.             Actions

3.1.                Completed

Who	Action	Assigned	Completed
Anne	Obtain quotes for replacing the “goods doors”	01/02/00	09/05/00
Anne	Obtain quotes for removing MG false floor and vault pipework	29/02/00	09/05/00
Jukka	Clarify the areas which are cooled by the 250kW taken from the machine room capacity	18/04/00	09/05/00
Jukka	Investigate the feasibility of providing cooling for a mezzanine floor in the machine room	18/04/00	09/05/00

3.2.                To be done

Who	Action	Assigned
Jukka	Determine the air conditioning capacity required for B513 offices.	09/05/00
Jukka	Investigate the use of the MG room air conditioning machine room to house air conditioning units for the vault.	09/05/00