Microtube Strip Heat Exchanger

Technical Report · Thu Dec 27 00:00:00 EST 1990

DOI:https://doi.org/10.2172/6233867· OSTI ID:6233867

Doty, F D

Doty Scientific (DSI) believes their Microtube-Strip Heat Exchanger will contribute significantly to (a) the closed Brayton cycles being pursued at MIT, NASA, and elsewhere; (b) reverse Brayton cycle cryocoolers, currently being investigated by NASA for space missions, being applied to MRI superconducting magnets; and (c) high-efficiency cryogenic gas separation schemes for CO{sub 2} removal from exhaust stacks. The goal of this current study is to show the potential for substantial progress in high-effectiveness, low-cost, gas-to-gas heat exchangers for diverse applications at temperatures from below 100 K to above 1000 K. To date, the highest effectiveness measured is about 98%, and relative pressure drops below 0.1% with a specific conductance of about 45 W/kgK are reported. During the pre-award period DSI built and tested a 3-module heat exchanger bank using 103-tube microtube strip (MTS) modules. To add to their analytical capabilities, DSI has acquired computational fluid dynamics (CFD) software. This report describes the pre-award work and the status of the ten tasks of the current project, which are: analyze flow distribution and thermal stresses within individual modules; design a heat exchanger bank of ten modules with 400 microtube per module; obtain production quality tubestrip die and AISI 304 tubestrips; obtain production quality microtubing; construct revised MTS heat exchanger; construct dies and fixtures for prototype heat exchanger; construct 100 MTS modules; assemble 8-10 prototype MTS heat exchangers; test prototype MTS heat exchanger; and verify test through independent means. 7 refs., 9 figs. 1 tab. (CK)

• Research Organization: Doty Scientific, Inc., Columbia, SC (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: FG01-90CE15440
• OSTI ID: 6233867
• Report Number(s): DOE/CE/15440-T1; ON: DE91005741
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
54 ENVIRONMENTAL SCIENCES
BRAYTON CYCLE POWER SYSTEMS
HEAT EXCHANGERS
CRYOGENIC STORAGE DEVICES
DESIGN
PERFORMANCE TESTING
POLLUTION CONTROL EQUIPMENT
EFFICIENCY
FABRICATION
GAS FLOW
HYDRODYNAMICS
MATERIALS
MODULAR STRUCTURES
PRESSURE DROP
PROGRESS REPORT
THERMAL CONDUCTIVITY
THERMAL STRESSES
THERMODYNAMICS
DOCUMENT TYPES
ENERGY SYSTEMS
EQUIPMENT
FLUID FLOW
FLUID MECHANICS
MECHANICS
MEMORY DEVICES
PHYSICAL PROPERTIES
POWER SYSTEMS
STRESSES
TESTING
THERMODYNAMIC PROPERTIES
420400* - Engineering- Heat Transfer & Fluid Flow
420201 - Engineering- Cryogenic Equipment & Devices
425001 - Engineering- Power Cycles- Brayton- (1980-)
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)