Experimental Evaluation of a Residential CO2-based Demand Controlled Dual Core Energy Recovery Ventilation System for Northern Housing

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• ASHRAE

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Heat/energy recovery ventilators (HRVs/ERVs) installed in the north are selected to meet the required ventilation set by ventilation standards calculated on the basis of fixed floor area and number of bedroom or people. Conventional HRVs/ERVs offer constant or globally controlled airflows. Northern housing experience varying occupancy and indoor conditions, often overcrowding leading to higher indoor pollutants and moisture that need to be controlled to avoid mold problem, deterioration of the indoor air quality (IAQ). To better address these issues ventilation needs to become smarter and designed to automatically adjust ventilation rate based on indoor needs. This paper present results from an experimental side-by-side testing of a CO2-based demand-controlled dual core ERV unit versus a conventional single core constant flow ERV using twin houses with simulated occupancies achieved by automated CO2 dosing systems. The control strategy was based on threshold for the difference CO2 concentration between return air from indoor to the ERV and outdoor air, and was used to control the ERV unit to adjust the supply and exhaust air flows based on four thresholds. The experimental results showed that the implemented ERV-based control strategy based on a CO2 sensor network connected with the dual core ERV unit is simple and can be effective in controlling the indoor CO2 concentrations in zones with continuous extraction of stale air by the ERV, but less effective in bedrooms during the sleeping time of the residents. However, the demand controlled ventilation strategy had a significant impact on the CO2-based DC ERV’s power consumption that increased by up to 82%.

Product Details

Published:

2023

Number of Pages:

9

Units of Measure:

Dual

File Size:

1 file , 4.6 MB

Product Code(s):

D-CCC23-32

Note:

This product is unavailable in Russia, Belarus