# Presentation: 127419

## DOE Data Center Tools SuiteData Center Energy Profiler (“DC Pro”)

- Lawrence Berkeley National Laboratory
- ANCIS
- EYP Mission Critical
- Rumsey Engineers
- Taylor Engineering

## Energy Savings:  Profiling is the First Step

**Energy Profiling**

**Subsystem Assessment**

**Detailed Engineering Audit**

**Engineering Design**

**Savings Validation (M&V)**

**Retrofit/RCx Implementation **

**Documentation**

**Notes:**
How much the Profiling Tool does before it passes the user to the Assessment Tools is still being debated.
We obviously want to be able to pass information collected in Profiling Tool to the Assessment Tools.

## Data Center Profiling Tool Objectives

- _Tentative_
- Estimate the efficiency of the IT equipment  (calculations/Watt).  Not simple.
- _Firm_
- Make an initial estimate of the overall efficiency of the data center support systems (the DCIE metric).
- Create initial, estimated energy use breakouts for the major data center systems.
- Provide a list of applicable energy-saving Actions.

**Notes:**
[why first objective is not simple]
DCIE = Data Center Infrastructure Efficiency = IT Equipment energy use / total energy use.
Energy breakouts can help owner decide where to focus efforts.
Profiling tool to determine only the applicability of various actions, not their cost-effectiveness.  The latter will be addressed in the Assessment Tools to be described later.

## Springboard:

- Quick Plant Energy Profiler, or “Quick PEP”
- Version 1.1.3, Feb 21, 2007
- http://www1.eere.energy.gov/industry/quickpep/default.aspx
- Suggested name for new tool:
- Data Center Energy Profiler, or “DC Pro”

**Notes:**
Ask how many in audience have seen Quick PEP before.
Flip to Quick PEP site, give brief overview.

## Energy Profiling Steps

- _Quick PEP_
- Home Screen
- 1 – Case Information
- 2 – Supplied Electricity
- 3 – Supplied Fuel
- 4 – Supplied Steam
- 5 – Product Info. (optional)
- 6 – Energy Use Systems
- 7 – Energy Use Distribution
- 8 – Energy Savings Opp.
- 9 – Results

- _DC Pro (suggested)_
- Home Screen
- 1 – Case Information
- 2 – Energy Use Systems
- 3 – Product Info. (optional)
- 4 – Supplied Electricity
- 5 – Supplied Fuel
- 6 – Supplied Steam
- 7 – Supplied Chilled Water
- 8 – Energy Use Distribution
- 9 – Energy Savings Opp.
- 10 – Results

**Notes:**
We suggest the same profiling steps, with the exception of one new addition, Supplied Chilled Water.  I will describe this a bit later in the presentation.
We also suggest a slightly different order to the steps.  Asking for a description of the energy-using systems up front helps focus the user’s attention on which energy streams are needed for a proper profiling exercise.

## Home Screen

- _Quick PEP_
- Allows the user to create an account (optional), and to create multiple plant profiles (one at a time).

- _DC Pro_
- We suggest leaving the function of this screen as-is.

**Notes:**
For the remainder of the presentation, I will be walking through profiling steps just outlined.

## Step 1 – Case Information

- _Quick PEP asks for:_
- Case Name
- Industry
- Contact Name
- Contact Email
- Contact Address

- _DC Pro (suggested)_
- Ask for the same, plus:
- Climate Zone
- Floor Area, Non-Data Center
- Floor Area, Data Center
- Data Center Tier (Uptime def.)
- DC Current Build-Out (%)

**Notes:**
Climate Zone:  This will help the profiling tool determine the potential impact of actions such as air-side or water-side economizing.
Floor Area, Non-Data Center:  If DC is standalone, OK to enter zero.  But if DC and Non-DC areas are served by a common system such as a CHW plant, we want the profiling tool to parse that system’s energy use.
Floor Area, Datacenter:  This will enable us to determine the IT equipment density, which in turn allows us to determine the potential impact of various air-side actions.  It will also allow us to identify very small “data centers”, embedded in a larger building.  The results of the profiling tool will likely be more coarse for small spaces.
Data Center Tier:  This gives an indication of what kind of capacity and redundancy is needed in the support systems.
DC Current Build-Out:  Knowing how much of the data center is currently built out allows us to project the full build-out load, and the corresponding applicable actions.  Question: Should we always project to 100% build-out, or should we allow the user to specify a final build-out percentage, too?

## Step 2 - Energy Use Systems

- _Quick PEP_
- Contains many systems that do not apply to data centers

- _DC Pro (suggested new list of major systems)_
- Data Center Loads
- Controls
- Electric Distribution
- Air-Side
- Data Center Cooling
- Chilled Water Plant

## Step 2 - Energy Use Systems, cont.

- _Data Center Load Subsystems_
- IT Equipment
- Lights
- _Controls Subsystems_
- Energy Management System
- _Electric Distribution Subsystems_
- Transformers
- Uninterruptible Power Supplies
- Power Distribution Units

## Step 2 - Energy Use Systems, cont.

- _Air-Side Subsystems_
- Floor Plenum
- Ceiling Plenum
- Ducts
- Humidifiers
- Active Dehumidification via Cooling Coils
- Dedicated Ventilation Unit

## Step 2 - Energy Use Systems, cont.

- _Data Center Cooling Subsystems_
- DX CRACs, Air-Cooled Condenser
- DX CRACs, Water-Cooled Condenser, Served by Dry Cooler
- DX CRACs, Water-Cooled Condenser, Served by Cooling Tower
- DX Package Unit(s), Air-Cooled Condenser
- DX Package Unit(s), Evaporatively-Cooled Condenser
- CHW CRAH
- CHW AHU
- Air-Side Economizer
- Rack-Mounted CHW Coils
- Rack-Mounted Hybrid CHW/Refrigerant Cooling (eg, Liebert XDV)

## Step 2 - Energy Use Systems, cont.

- _Chilled Water Plant Subsystems_
- Electric Chilled Water Plant, Air-Cooled
- Electric Chilled Water Plant, Water-Cooled
- Water-Side Economizer
- Having the user identify existing systems supports:
- Creating the initial, default energy use break-outs.
- Limiting the scope of the Score Card questions.
- Limiting the list of applicable Actions.

## Step 3 - Product Information (Optional)

- _Quick PEP_
- Flexible screen allows user to quantify one additional parameter (e.g., product, employees, sales), and receive energy-per-X results.

- _DC Pro_
- The concept is fine, but there is ongoing debate about how to quantify what data centers produce.

## Supplied Energy “Streams”

- Step 4 – Supplied Electricity
- Step 5 – Supplied Fuel
- Step 6 – Supplied Steam
- Step 7 – Supplied Chilled Water
- Quick PEP does not provide any results unless at least one energy stream is quantified.  We suggest that this same approach be retained for DC Pro, and furthermore suggest that there must be at least one electric stream.

## Step 4 - Supplied Electricity

- The data center is often embedded in a larger building.
- We do not necessarily need electricity streams for the entire facility, just streams that feed the datacenter and its support systems.
- It is OK to have the stream(s) feeding more than just the DC and support systems, as a later screen allows user to assign a % of each stream to “other”.
- We suggest leaving this screen as-is, but adding text to clarify which streams are needed.

## Step 5 - Supplied Fuel

- We suggest leaving this screen as-is.  Humidifiers may use fuel other than electricity.

## Step 6 - Supplied Steam

- We suggest leaving this screen as-is.  Humidification system may use purchased steam.

## Step 7 - Supplied Chilled Water

- This is a suggested new screen.  Some data center facilities purchase chilled water from a third party.
- This screen would be similar to the Supplied Fuel screen, but would ask for chilled water usage rates and costs.

## Step 8 - Energy Use Distribution

- The new screen would be similar to the existing screen, but would add a tab for chilled water if the Supplied Chilled Water concept is adopted.

## Step 9 - Energy Savings Opportunities

- We suggest keeping same structure for this screen.  The “Score Cards” will be new, with questions appropriate to the suggested data center systems:
- Data Center Loads
- Controls
- Electric Distribution
- Air Side
- Data Center Cooling
- Chilled Water Plant

## Step 9 - Energy Savings Opportunities

- Example Score Card Questions (for Electric Distribution System):
- Transformer Efficiency?
- Number of UPS Modules?
- UPS Module Capacity?
- Average UPS Load Factor?
- etc
- The answers to the Score Card question will support:
- Refining the energy use breakouts (at the major system level only).
- Further limit the list of applicable Actions.

## Step 10 - Results

- _Quick PEP_
- Case Information
- Annual Energy Purchases
- Annual Energy Consumption
- Potential Annual Energy Savings
- Suggested Next Steps

- _DC Pro_
- Case Information
- Data Center Infrastructure Efficiency (DCIE)
- Annual Energy Purchases
- Annual Energy Consumption
- Potential Annual Energy Savings
- Suggested Next Steps

## Step 10 – Results, cont.

**Notes:**
[Say something about how DC Pro constructs this chart.]

## Step 10 – Results, cont.

- _Example List of Actions (for Electric Distribution System)_
- Shut Down UPS Modules When Redundancy Level is High Enough
- Use High Efficiency MV and LV Transformers
- Reduce the Number of Transformers Upstream and Downstream of the UPS
- Locate Transformers Outside the Datacenter
- Use 480 V instead of 208 V Static Switches (STS)
- Specify High Efficiency Power Supplies
- Eliminate Redundant Power Supplies
- Supply DC Voltage to IT Rack
- etc

**Notes:**
The idea is that DC Pro will contain a current, complete list of all the actions that the Assessment Tools are capable of analyzing, but will present to the user only those actions that are applicable, based on the user’s inputs.
DC Pro will not be concerned with cost-effectiveness of any action, only with its applicability.  The user will need to exercise the Assessment Tools to determine what the expected savings and implementation costs are for each action.

## We need your input!

*Purpose of today’s Profiling Tool workshop:*
- Are the inputs reasonable?
- Are the outputs appropriate and adequate?

## Thank You!

*See you at the Profiling Tool Workshop Session. *