01 · MODULE 06

Two-stage DHW module

Name: Two-stage DHW module · ANHEL
Brand: ANHEL
SKU: BITP-NU

Used in closed domestic-hot-water schemes. Skid-mounted: 1st-stage and 2nd-stage heat exchangers, circulation pumps and piping.

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02 · Technical specifications

Series parameters

Reference characteristics. The final configuration is sized to the project brief.

Heat exchangers
2 to 4standard
Circulation pumps
1 to 3standard
Pump location
supply / return
Heat-exchange stages
2 (preheater + main)
Pump control
on/off / VFD / VFD-per-pump
DHW control
by temperature, cascade

03 · DESCRIPTION

Purpose and operating principle

In a two-stage mixed scheme, cold DHW water first passes through a preheater (tail) exchanger where it is warmed by the heating-loop return water, then through the main exchanger where it is brought up to temperature by the primary supply water. This recovers the otherwise-wasted heat from the return line and reduces the load on the main exchanger. It is used at facilities with high and variable DHW load.

04 · APPLICATIONS

Where the module is used

Multi-unit residential buildings with high and variable DHW load
Business centres and shopping complexes
Facilities with sharp peaks in hot-water consumption
Retrofit of substations to improve energy efficiency

05 · ADVANTAGES

Why ANHEL®

Factory assembly, quality control and our own automation.

Factory assembly
Block-modular construction — not improvised on-site assembly in the basement.
Made to order
Built to the heat-network design parameters with flexible capacity and heat-carrier options.
Quality control
Every module passes hydraulic and electrical testing before shipment.
Weather-compensated control
Automatic parameter selection from the outdoor sensor. Integrates with the building SCADA.
Long design life
Average service life of at least 15 years in normal operation.
Complete documentation set
Regulatory, operational and passport documents — all supplied with the delivery.