Summary

The Mechanically Pumped Fluid Loop is aimed to provide a European Single-Phase Mechanically Pumped Fluid Loop (MPFL), consisting of a Pump Package, bypass assembly, connectors and coolant fluid, that may be used on future very high-power communication satellites, such as the extended range AlphaBus telecommunications platform.

Alphabus is a new telecommunications satellite platform in the payload DC power range from 12 to 18 kW.

Architecture

The MPFL subsystem architecture is depicted in the figure above. The payload dissipates its heat into the Payload Heat Exchanger (PHX). The Radiator Heat Exchanger (RHX) provides heat dissipation from the coolant to the external environment. For reliability purposes, both Pump Package and bypass assembly are redundant. This redundant design provides the possibility to switch to a redundant Pump and 3-Way valve in case of active branch failure. Maximum use has been made of qualified European off-the-shelf components.

Full Size Characterization Testing

The control algorithm determines the regulation behavior of the 3-way valve, which divides the flow between the Radiator Heat Exchanger (RHX)-branch and the bypass. Purpose of the Control Algorithm is to control the pump inlet temperature of the Pump Package.

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Last updated: 2022-05-28

Mechanically Pumped Fluid Loop

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