District cooling: Phase 2, Direct freeze ice slurry system testing

Technical Report · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/7011359· OSTI ID:7011359

Winters, P J

The objectives of this research are to: extend the range of pressure drop data for ice-water slurry flows; and design and build a prototypical ice slurry distribution system which demonstrates ice slurry handling at an end user's heat exchanger, without sending ice slurry directly through the heat exchanger. Previous research (Phase 1) conducted by CBI under DOE Contract FG01-86CE26564 has shown a friction reducing effect of ice crystals in water flow. The results of this work demonstrated a 40% reduction in pump power required to move an ice-water slurry versus the same mass flow of water only. In addition to lower pressure drop, pumping ice slurries is advantageous because of the large latent and sensible heat cooling capacity stored in the ice compared to only sensible heat in chilled water. For example, an ice-water slurry with a 20% ice fraction (by mass) has a mass flow rate that is 70% less than the mass flow rate required for a chilled water system cooling and equivalent load. The greatly reduced mass flow combined with the friction reducing effects of ice-water slurries results in a total savings of 83% in pumping power. Therefore, a substantial savings potential exists for capital costs and system operating costs in ice-water slurry district cooling systems.

• Research Organization: Chicago Bridge and Iron Technical Services Co., Plainfield, IL (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: FG01-88CE26559
• OSTI ID: 7011359
• Report Number(s): DOE/CE/26559-T1; ON: DE90009359
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250600 -- Energy Storage-- Thermal
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
CAPACITY
COMPARATIVE EVALUATIONS
COMPRESSORS
COOLING
DESIGN
DISPERSIONS
DISTRICT COOLING
DOCUMENT TYPES
EFFICIENCY
ENERGY CONSUMPTION
ENERGY EFFICIENCY
ENERGY STORAGE
HEAT EXCHANGERS
ICE
IMPLEMENTATION
MANAGEMENT
MASS TRANSFER
MEASURING INSTRUMENTS
MIXTURES
PERFORMANCE TESTING
PLANNING
PROGRAM MANAGEMENT
PROGRESS REPORT
PUMPS
SLURRIES
STORAGE
SUSPENSIONS
TECHNOLOGY ASSESSMENT
TESTING