Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: variable air flow

Sortuj według:

Ogranicz wyniki do:

Indoor air quality assessment in a single-family house equipped with demand controlled mechanical ventilation

Müller Jarosław, Dębowski Maciej

Ecological Chemistry and Engineering. S

2020

Vol. 27, nr 3

387--402

The paper presents the results of modelling airflow for ventilation of a single-family house with an area of 180 m2. The building was equipped with mechanical ventilation with the possibility of varying the airflow. The airflow was calculated as a function of carbon dioxide concentration. The presence of people in selected rooms was an internal source of carbon dioxide. In order to properly design of a ventilation system and then model the contamination level, ContamW software was used. The year-long cost analysis was carried out for the installation working with variable airflow (day, night). The analysis took into account the price of the electricity used by the fans of Air Handling Unit and meteorological data to estimate the power input to the heater of the Unit. Different scenarios of system operation were included as an input data in order to find a difference in energy consumption. The calculations were to answer the question of whether it is necessary to apply expensive and advanced system that enables individual control of the airflow in every room or use the simple control of the central unit to vary the airflow in the ventilation system of single-family houses. The difference in operating cost between the system that maintains 800 and 600 ppm reaches 100 % and demonstrates the need of simple demand controlled ventilation system.

Sterowanie pracą wentylatorów w systemach VAV

Lewicka A., Przydróżny E.

Instal

2015

nr 10

54--58

W artykule przedstawiono dwa różne rozwiązania sterowania pracą wentylatorów w systemach ze zmiennymi strumieniami powietrza wentylującego. Dla rozpatrywanych sposobów sterowania wentylatorami wykonano analizę rozkładu ciśnienia powietrza w przykładowej instalacji wentylacyjnej przy różnych przepływach powietrza oraz analizę całorocznego zapotrzebowania na energię do transportu powietrza wentylującego.

The paper presents the possibilities of fan controlling in ventilation systems with variable air flow. Fan control methods have been presented for the analysis of air pressure distribution in ductwork and year-round demand energy to transport the ventilation air and its costs.