EARTH TUBE VENTILATION SYSTEM: A PROJECT PRE-FEASIBILITY ANALYSIS TOOL

2007 ◽  
Author(s):  
M.A.A. COSTA ◽  
M.S.A. OLIVEIRA ◽  
N. MARTINS
Keyword(s):  
Ventilation System ◽  
Feasibility Analysis ◽  
Analysis Tool ◽  
System A

scholarly journals A Novel Method to Evaluate Patient-Ventilator Synchrony during Mechanical Ventilation

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Liming Hao ◽  
Shuai Ren ◽  
Yan Shi ◽  
Na Wang ◽  
Yixuan Wang ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Ventilation System ◽  
Future Research ◽  
Evaluation Indexes ◽  
Response Parameter ◽  
System A ◽  
Clinical Strategies ◽  
The Future ◽  
Novel Method ◽  
Ventilator Synchrony

The synchrony of patient-ventilator interaction affects the process of mechanical ventilation which is clinically applied for respiratory support. The occurrence of patient-ventilator asynchrony (PVA) not only increases the risk of ventilator complications but also affects the comfort of patients. To solve the problem of uncertain patient-ventilator interaction in the mechanical ventilation system, a novel method to evaluate patient-ventilator synchrony is proposed in this article. Firstly, a pneumatic model is established to simulate the mechanical ventilation system, which is verified to be accurate by the experiments. Then, the PVA phenomena are classified and detected based on the analysis of the ventilator waveforms. On this basis, a novel synchrony index SIhao is established to evaluate the patient-ventilator synchrony. It not only solves the defects of previous evaluation indexes but also can be used as the response parameter in the future research of ventilator control algorithms. The accurate evaluation of patient-ventilator synchrony can be applied to the adjustment of clinical strategies and the pathological analyses of patients. This research can also reduce the burden on clinicians and help to realize the adaptive control of the mechanical ventilation and weaning process in the future.

scholarly journals Analysis of alternative ventilation strategies for existing multi-family buildings using CONTAM simulation software

2020 ◽  
Vol 172 ◽  
pp. 09004
Author(s):  
Xinxiu Tian ◽  
Jamie Fine ◽  
Marianne Touchie
Keyword(s):  
Ventilation System ◽  
Poor Performance ◽  
Simulation Software ◽  
Base Case ◽  
Building Model ◽  
System A ◽  
Airflow Distribution ◽  
Air Ventilation ◽  
Ventilation Strategies ◽  
Post War

In many existing high-rise multi-family buildings, a pressurized corridor ventilation system is used to meet outdoor air ventilation requirements. However, this system often has poor performance, leading to under- or over- ventilation in different parts of a building. This study examines three ventilation strategies including: the base case, which is a traditional pressurized corridor ventilation system, a direct-to-suite ducted ventilation system, and a suite-based HRV ventilation system. A building model was constructed in CONTAM using features of a typical post-war multi-family building in Toronto, Canada. All three strategies were simulated using CONTAM under both summer and winter conditions. The resulting outdoor airflow delivery rates to the suites and corridor pressure differentials were compared to assess the effectiveness of each strategy. The results show that the suite-based HRV strategy is able to provide adequate ventilation airflow to individual suites in both summer and winter. In the traditional pressurized corridor system and the direct-to-suite ducting system, the airflows delivered to the suites located at the top of the building are higher than those delivered to the suites located at the bottom of the building. This uneven airflow distribution is more pronounced in winter when stack effect impacts the ventilation system more significantly.

scholarly journals A study on the Contamination of Microbial in a Geothermal Exchanger Pipe by Lab-experiment

2019 ◽  
Vol 111 ◽  
pp. 06062
Author(s):  
Hyuntae Kim ◽  
Makoto Koganei
Keyword(s):  
Global Warming ◽  
Energy Consumption ◽  
Geothermal Energy ◽  
High Efficiency ◽  
Ventilation System ◽  
Pipe Surface ◽  
System A ◽  
Reduce Energy Consumption ◽  
High Insulation ◽  
Reduction Of Energy Consumption

Recently, since global warming has continued, reduction of greenhouse gas CO2 is required. CO2 emissions in the civil area sectors in Japan account for approximately 30%, which is about one-third of the whole of Japan. Therefore, reduction of energy consumption in houses, office and etc. is obviously required. In order to reduce energy consumption of buildings, high-efficiency of machinery, high-insulation, high-airtightness, and use of renewable energy are mentioned. Especially, use of geothermal energy which has almost constant temperature throughout the year has been drawing attention. However, in case of geothermal ventilation system, a fungi, dust, pollen and etc. derived from the outside air are taken directly into the pipe. It is concerned that they cause contamination inside the pipes and breeding of molds, which may lead to odors. The present study analyzed the contamination degree of the pipe surface in the geothermal ventilation system and proposed cleaning frequency in the pipe, cleaning method and so on.

Field Performance Evaluation of a Ventilation System: A Swine Case Study

2012 ◽  
Vol 28 (2) ◽  
pp. 251-257 ◽  
Author(s):  
J. D. Harmon ◽  
M. C. Brumm ◽  
L. D. Jacobson ◽  
S. H. Pohl ◽  
D. R. Stender ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Ventilation System ◽  
Field Performance ◽  
System A

Feasibility Analysis of 100kW Grid Connected PV System: A Case Study at Karachi

2016 ◽  
Vol 4 (3) ◽  
pp. 165-173
Author(s):  
Umer Zahid ◽  
◽  
Muhammad Ihsan Ul Haq ◽  
Sidra Zahid ◽  
Abdullah Khan ◽  
...  
Keyword(s):  
Feasibility Analysis ◽  
Pv System ◽  
System A
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