All,
I&#;m a recent grad in ME, so my experience with real world problems is limited. I have been tasked with analyzing the HVAC of a server room with an area of about 500 sq. ft. and a raised floor. I don&#;t have any experience with HVAC analysis, but here is my approach:
1. Determine through manufacturing documents the power load in watts of all the equipment: Computers, servers, uninterruptible power supplies (UPS) and anything else using power in the room.
2. Convert each power to Btu/hr if the heat dissipation is not specified in the manufacturing documents.
3. Convert this total Btu/hr into tons of cooling and then look in some catalogs for systems that can handle my cooling ton requirement.
I assume that the power load from the equipment in the room will be the biggest contributor to the heat, and thus the cooling requirement, so I am focusing on that. Please tell me if this is the standard approach for HVAC analysis. Here are some questions that I still have about my approach:
-I feel like I&#;m not considering scalability in this approach because I&#;m only considering what equipment is currently going in the room, and not what might be put in there in the future. Should I consider the situation of having the maximum amount of server racks filled with the most power drawing equipment and calculate the cooling required from this?
-The room is lit with fluorescent bulbs. Since this is a smaller room, can I assume that the heat gain from the light is negligible?
-I was told that there wont be any people in this room, so is it safe to assume heat gain from occupancy is negligible, or is there a standard that I should assume a certain amount of people might be present?
-The room is located in the middle of a larger building with other offices/people. Do I have to factor in heat transfer through the walls/ceiling/floor? (Because the server room doesn&#;t have any walls that are exposed to the outside weather, I was thinking no).
-There are no windows in this room, but I was wondering how important figuring out the heat transfer through the entry door is.
-If I just add up all the power loads and convert this to tons of cooling, I&#;m not really considering temperatures even though I have a feeling I should. Am I missing something here?
-I feel like I&#;m forgetting about the &#;V&#; in HVAC. How do I determine whether I need to spec for ventilation or not?
I feel like I might be overanalyzing this problem. I know this is a long post full of many questions, but I do appreciate any help or insight any of you can give a young engineer. Thanks!
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Hi,
Can somebody please suggest me what approximate size of AC we should purchase or how can I do a &#;heat load calculation&#; for our new server room?
Following are the server room details
Server room size : 4x2.4m
Equipments:
HP Proliant DL 380 G6 Server - 3 Numbers
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47 U Racks - 2 Numbers
Cisco Catalyst Switches - 2 Numbers
Panasonic TDA 100 PABX - 1
Sonicawall TZ 180 Router
Well I was suggested to get support from professional database builders. But as we are running through a very strict budget I really afraid that company wouldn&#;t approve it.
Any suggestions and support will be highly appreciated. Thanks in advance
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