System Envelope Energy Transfer Station

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System Envelope Energy Transfer Station

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Summary
Applications
Designed for indoor applications that include but not limited to District energy building load energy transfer station, Waterside economizer/ cooling tower, Pressure break, Geosource heat sink or heat source, Boiler Circuit application, Sector coupling and Tertiary loads
Description
Armstrong’s System Envelope technology reimagines the HVAC system as a network of integrated, intelligent subsystems, delivering value far beyond standard alternatives. With exact heat transfer mapped curves embedded in its control software, System Envelope Energy Transfer System seamlessly align operating data and system selection with pumps. This integrated packaged solution proactively adjusts flow, reducing energy consumption by more than 30%. Designed to seamlessly unite with existing HVAC equipment and BAS to deliver a factory tested solution for fluid flow and heat exchange, combining reliability, efficiency, and intelligence to offer unmatched value compared to any alternative.
Materials
Armstrong’s Brazed Plate Heat Exchangers with 316 Stainless Steel Plates and Copper brazing, and Design Envelope Tango Pumps with Stainless Steel impeller and on-board Intelligent Variable Speed controls with Sensorless control
Configuration
A factory-assembled and fully tested packaged system, complete with integrated system controls for seamless operation. Consists of a Heat Transfer Module that incorporates up to three brazed plate heat exchangers for optimal energy transfer and a Pumping Module with customizable options that include pumps or pump-and-pressure independent control valve combinations to regulate fluid flow effectively.
Performance range
Heat Load from 950MBH to 7125 MBH (278kW to 2088kW) and Flow from 190gpm to 1425gpm (12L/s to 90L/s)
Power Range
5HP to 40HP
Size
Heat Transfer Module (LxWxH) from 39”x55”x79” to 94”x55”x79”
Pumping Module (LxWxH) from 37”x31”x65” to 61”x40”x65”

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Lowest installed cost

Compact design uses up to 75% less floor space than traditional approaches. Lower overall height means the system fits in a standard room with 8 ft ceilings.
Systems can be delivered as a set of factory built modules, which can pass through regular elevator door, to be assembled on site. Modules can be added as needed, so your installation is future-proofed against changes to HVAC load
Easy installation and commissioning process combined with minimized costs for bas points. Factory programmed, calibrated and tested systems reduce time and risk during commissioning

Pump Models Designed and Engineered for Outdoor Operation

Controls enclosure rated for UL type 4x. Equipped with overhead weather shield to prevent icing in cold weather or overheating in direct sunlight.

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Lowest operating cost

Pre-programmed optimization algorithms are available for even better efficiency in select applications.
Proactive management minimizes the possibility of a system outage and emergency service costs.
Maintaining return temperature on the source side and supply temperature on the load side
Capacity matching: maximize source side Delta T with constant temperature approach and constant load side Delta T
Flow matching: matching the source side mass flow with the load side mass flow
Customized optimal mode: maximize source side Delta T with variable temperature approach and variable load side Delta T
Internal sensors and monitoring functions provide alerts and trending related to flow and heat transfer, vibration, power draw, RPM, sensor failure, heat imbalance, clogging and communication errors.

Lowest installed cost. Lowest operating cost.

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Lowest project and operating risk

Packaged systems solutions with performance certified by ETL, assembled and tested at an ISO 14001 certified facility to ensure investment grade performance for developers, operators and contractors
Application specific algorithms and control sequences the user can choose to optimize operation for best energy efficiency and reliability reducing the need for custom designs and programming. Algorithms are based on industry best practices and patented methods for best efficiency.
Powers and optimizes buildings by precisely controlling the temperature differential on the load side. This maximizes energy transfer, prevents utility backcharges, and minimizes overall power consumption. It also offers options for pressure-independent controls and seamless staging of multiple heat exchangers for enhanced efficiency and flexibility.
Built with a standard pressure rating of 250 psi, ensuring easy installation and commissioning. Advanced algorithms enable precise control of outlet temperature, load-side temperature differentials, or supply-side temperatures, seamlessly integrating with pumps or pressure-independent control valves. Minimum and maximum flow parameters safeguard chillers and boilers, enhancing system protection and reliability.