Wyniki wyszukiwania - BazTech

1

CFD modelling of thermal comfort in the passenger coach

Palmowska Agnieszka, Sarna Izabela

Architecture Civil Engineering Environment

|

2022

|

Vol. 15, no. 4

133--146

EN

This paper presents the results of numerical simulations of thermal comfort in a passenger coach. The numerical model with people’s presence was developed and appropriate boundary conditions were prepared. The ANSYS CFX program was used for the simulations. The calculations were carried out for summer and winter conditions. The predicted mean vote (PMV), predicted percentage dissatisfied (PPD) and draft rate (DR) were calculated to assess the thermal comfort of passengers. The requirements of railway standards in terms of passenger comfort assessment were also verified. Based on the simulation results, it was found that the thermal comfort conditions of the passengers in the coach were not fully satisfactory, especially in summer.

2

Projektowanie systemów wentylacji w obiektach przemysłowych

Palmowska Agnieszka, Sarna Izabela, Żydek Karolina

Nowoczesne Hale

|

2020

|

Nr 1

26--33

PL

W artykule przedstawiono najważniejsze wymagania dotyczące projektowania wentylacji przemysłowej – ogólnej, miejscowej i pożarowej – w obiektach przemysłowych. Są one określone na podstawie przepisów obowiązujących w zakresie budownictwa, ochrony środowiska, bezpieczeństwa i higieny pracy oraz znajdują się w literaturze fachowej.

EN

The article presents the most important requirements of designing the general, local exhaust and fire ventilation systems in industrial facilities. The requirements are based on regulations of civil engineering, environmental protection, occupational health and safety or are found in specialized literature.

3

Bezpieczeństwo pożarowe w obiektach przemysłowych

Król Małgorzata, Sarna Izabela, Żydek Karolina

Nowoczesne Hale

|

2020

|

Nr 4

34--41

PL

W artykule przedstawiono najważniejsze wymagania przeciwpożarowe stawiane obiektom przemysłowym oraz systemy zapewniające bezpieczne warunki ewakuacji i ograniczające rozwój pożaru, które spełniają cele bezpieczeństwa pożarowego obiektów.

EN

The article presents the most important requirements for fire safety in industrial facilities as well as fire safety systems which provide safe conditions during evacuation and reduce fire propagation.

4

Modelling of the airflow in the passenger coach

Sarna Izabela, Palmowska Agnieszka

Architecture Civil Engineering Environment

|

2019

|

Vol. 12, no. 4

125--133

EN

In this paper currents requirements of HVAC designing (Heating, Ventilation and Air Conditioning) in railway vehicles have been presented. The data were based on railway standards [1, 2]. The aim of this study was to carry out the numerical calculation of airflow combined with heat exchange in a passenger coach. ANSYS CFX 12.1 software was used to carry out the simulation. Two cases of boundary conditions were considered, the first obtained from design calculations common for ordinary buildings and information included in standards and the second only based on the information included in standards. After analysing of the results, it was found that the distribution of air velocity in a coach was similar in both cases, average air velocity was 0.79 m/s. However, the distribution of air temperature was different. For case 1 the average indoor air temperature was 25.07°C and for case 2 was 23.53°C. The method of determining the heat solar gains had a great impact on the results. A further possibility of a model improvement was indicated for example human models will be introduced in coaches, in order to verify the conditions of their thermal comfort, and air recirculation.