Stratification in CW TES

Certificate of FT Energy

ISO 9001

ISO 14001

IGSHPA Member (Oklahoma State University)

Certificate of Patent

Certificate of Patent

Registration of Patent

IDEA Certificate

Certificate of Patent

Certificate of Patent

Executive Summary

FT Energy implemented an Uninterruptible Chilled Water Supply (UCS) tank that enabled a high density data center to survive a power outage without costly thermal damage to servers. The system, based on auxiliary chilled water storage tanks, kept the data center cool when an outage caused the chillers to shut down.

Why is this system important to data center

In data centers with high power and heat densities, a power sag or outage can cause rapid temperature increases. This is because cooling systems temporarily shut down, while servers keep producing heat because they are on an uninterruptible power supply (UPS).

To overcome this problem, FT Energy implemented an Uninterruptible Chilled Water Supply Tank(UCS) at a large regional hub data center. The system, based on pressurized tanks containing chilled water operated successfully during an outage that lasted several hours.

FT Energy’s Advantage and Technology

• Optimized design for peak flow and storage capacity.
• Flexible back up time adjustment design.
• Design and manufacture of pressure tank according to ASME code.

Operation

When the chillers stopped working, the system added water from the tanks to the chilled water system to maintain cool data center temperatures.
Chilled water system pumps and air handler fans continued operating because they were on UPS and generator backup power.
Servers continued to operate for more than 15 minutes due to the light load on the data center at the time of the utility power outage.
The thermal reserve maintained cooling during this period and for long enough afterwards to allow dissipation of residual heat from the servers.

CFD

Vertical type

Horizontal type

Features

• Recovery function using hydraulic pressure in case of power failure
• Water hammering prevention function
• Opening / Closing speed adjustable (30s ~ 120s)
• Remote monitoring/management function (RS 485,Open protocol)
• Anti-seize function, Self-checking function

Product Picture

• Specification

  BODY		ACTUATOR
  Pressure	KS 10k/20k/40k	Power	AC 24 / AC 220V
  		Signal	4~20 mA
  Temperature	-20 ℃ ~ 220 ℃	Speed	0.44mm/s & 0.8mm/s
  		Speed control	Bidirectional speed control
  Flow Media	Water, Oil, Gas, Steam	Duty Rating	100%
  		Operating type	Single / Double acting
  		Assembly	Separation/Combination method
  Applied Type	Globe, Butterfly	Local Switch	Auto/Manual and

Video

Polyurethane Foam

• Properties

  Is a two-component, light weight, energy efficient insulation system that can be utilized in the form of prefabricated rigid board stock, spray pour of froth applied, depending on design and product requirements

• Structure

  The proper ratio of these raw materials cross linked together, provide an insulating material with a high strength to weight ratio, good thermal stability, low thermal conductivity with excellent adhesion to most substrate materials.
  Since rigid polyurethane foam is 90 to 95% closed fine cell, it provides the lowest “K” and highest “R” factor, commercially available.
  These advantages make polyurethane foam the most energy efficient and cost effective insulation material currently available.

• Injection Method

  Unlike the spray method, FT Energy uses the injection method to insulate. The advantages of the injection type compared to the general spray method are as follows.

  1. Insulation foam of a certain thickness can be made.
  2. Unlike the spray method, it does not pollute the surrounding environment. So it is easy to work in the city center.
  3. The spray method requires finishing work, but the injection method is not necessary.
  4. The amount of foam used is less than spray.
  5. The spray method requires a technician with long experience, but the injection method can also be done by a technician with intermediate experience.
  

  

  

  

Advantages of Polyurethane Foam

The best insulation efficient polyurethane foam is composed of independent closed cells filled with freon gas, thus, has lowest thermal conductivity among various other insulating materials which are being used for cold storage facilities.

• Properties of Polyurethane Foam

  PROPERTIES	VALUE
  DENSITY (g/cm3)	0.025 ~ 0.050
  THERMAL CONDUCTIVITY (Kcal/mh℃)	0.018 ~ 0.021
  COMPRESSIVE STRENGTH (Kg/cm2)	1.5 ~ 4.5
  SERVICE TEMPERATURE (℃)	-170 ~ 100
  WATER ABSORPTION (%)	Less than 3%
  CLOSED CELL CONTESTS (%)	90 ~ 95

  

  

Video

Description of Polyurea

• Reaction of isocyanate with primary amine terminated polyethers
• Processed commercially available high pressure
• High temperature impingement mix spray equipment
• A two-component spray elastomeric and coating system, one component being the isocyanate quasi prepolymer and the other component being the resin blend

Advantages

• Fast reactivity and cure
• No catalysts
• Relative water insensitivity
• Ambient temperature insensitivity
• Two component, 100% solid
• Wide formulation flexibility aromatic and aliphatic system
• Excellent physical properties
• High thermal stability, mainly aromatic systems
• Reinforcement incorporation
• Easily pigmented
• Ease of application, spray, pour or rim

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