ventilation and temperature

Heating, ventilation, and air conditioning

SummaryVentilationOverviewHistoryHeatingAir conditioningEnergy efficiencyAir filtration and cleaning

See also: Duct workVentilation is the process of changing or replacing air in any space to control the temperature or remove any combination of moisture, odors, smoke, heat, dust, airborne bacteria, or carbon dioxide, and to replenish oxygen. Ventilation often refers to the intentional delivery of the outside air to the building indoor space…

The Effects of Ventilation, Humidity, and Temperature on Bacterial …

The Effects of Ventilation, Humidity, and Temperature on Bacterial Growth and Bacterial Genera Distribution. by. Yujia Qiu. 1,†, Yan Zhou. 1,*,†, Yanfen …

Roles of temperature and ventilation in oxygen consumption: A …

These marginal seas have special properties such as high/low temperature, rapid/slow ventilation. The temperature can affect the oxygen consumption process of organic matter degradation driven by microorganisms, and the rate of ventilation can affect the dating of water (i.e., age), then affecting the rate of apparent oxygen consumption.

Understanding Sauna Airflow for Optimal Ventilation

The optimal temperature for a sauna is typically between 176 to 194 degrees Fahrenheit (80-90 degrees Celsius), while humidity levels vary depending on the sauna type. By monitoring temperature and humidity levels using a thermometer and hygrometer, you can ensure that your sauna remains within the optimal range.

Development and application of linear ventilation and temperature …

Table 6, Table 7 sketched the results of optimal supply air temperatures after control in two cases: (1) The outdoor temperature remained constant at 298 K (25℃) and the heating values of four heating bodies changed somewhat (considering different number of personal computers); (2) The heating value of one heating body was 135 W …

(PDF) The effects of ventilation and temperature on sleep quality …

Ten healthy young adults slept one by one in a specially designed and constructed sleep capsule located in a climate chamber at two temperatures (24 and 28 °C) and two ventilation rates that ...

Natural Ventilation

The use of a natural ventilation system assumes temperature stratification throughout the room height. Air close to heat sources is heated and rises as a thermal plume (Fig. 7.108). Part of this heated air is evacuated through air outlets in the upper zone, and part of it remains in the upper zone, in the so-called heat cushion.

Natural Ventilation

Natural ventilation relies on natural forces: wind from the surrounding environment as well as buoyancy forces that develop due to temperature gradients within the building. …

What''s Ventilation: Types and the Importance of Natural Ventilation

1. Natural Ventilation. This type of ventilation relies on natural driving forces like wind and temperature differences to circulate air. It''s the most traditional form and involves the use of windows and doors, as well as other openings, to allow fresh outdoor air to replace indoor air.

Ventilation (architecture)

Ventilation is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used to control indoor temperature, humidity, …

Natural Ventilation for Infection Control in Health-Care …

Ventilation moves outdoor air into a building or a room, and distributes the air within the building or room. The general purpose of ventilation in buildings is to provide healthy air for breathing by both diluting the pollutants …

The History of Ventilation and Temperature Control

Ventilation to control odors and reduce disease became an inte-gral part of heating equipment. It was becoming clear that over-heating was a key part of the sense of poor …

Associations of bedroom temperature and ventilation with …

Bedroom environmental quality is one of the key causes of sleep disturbance, so a better understanding of the associations of bedroom temperature and ventilation rate (using CO 2 as the surrogate) with …

The effects of ventilation and temperature on sleep quality and next …

DOI: 10.1016/j.buildenv.2021.108666 Corpus ID: 245200274; The effects of ventilation and temperature on sleep quality and next-day work performance: pilot measurements in a climate chamber @article{Fan2022TheEO, title={The effects of ventilation and temperature on sleep quality and next-day work performance: pilot measurements in a …

Ventilation, Temperature, and Humidity

Humidity levels and ventilation affect an animal''s ability to cope with heat stress. Cows are at risk of heat stress when temperature and humidity exceed a THI, (temperature humidity index) of 72 (17) (see Appendix B – Temperature-Humidity Index Table for more detail). When the THI exceeds 72, additional management is required to …

The Effects of Ventilation, Humidity, and Temperature on Bacterial …

Background: Bacteria are readily nourished in airtight environments with high humidity, such as storage cabinets, clothing closets, and corners, where ventilation is normally low and humidity is high. Objectives: We characterized the role of humidity and ventilation in bacterial growth and genus distribution at different temperatures (26 °C …

Temperature fluctuations and ventilation dynamics induced by …

INTRODUCTION. Cave ventilation and air temperature fluctuations play crucial roles in controlling speleothem growth rate, as well as influencing their morphology and internal fabrics (Spötl et al., Reference Spötl, Fairchild and Tooth 2005; Treble et al., Reference Treble, Fairchild, Griffiths, Baker, Meredith, Wood and McGuire 2015; Mattey …

Investigating the coupling effect of ventilation and GHEs on …

The couple effect of ventilation and GHE on the temperature. • The high flow rate of GHEs initially enhances heat transfer but decreases late. • Ventilation prolongs the heat exchanges time and affect the efficiency. • Optimal ranges for 0.4–0.6 m/s and 1.5–2 m/s ensure efficient heat exchanges.

The effects of ventilation and temperature on sleep quality and next …

The present results, albeit from a small exploratory pilot study, show that increased temperature and reduced ventilation both have negative effects on sleep …

The history of ventilation and temperature control | Semantic Scholar

The history of ventilation and temperature control. About the Author John E. Janssen chaired Standards Project Committee (SPC) 62, which developed ANSI/ASHRAE Standard 62 1989, Ventilation for Acceptable Indoor Air Qualtiy and also served on the SPC that wrote Standard 62 1981. Until his retirement, he was a principal research fellow at …

The effects of ventilation and temperature on sleep quality and next …

The effects of ventilation and temperature on sleep quality and next-day work performance: pilot measurements in a climate chamber. Xiaojun Fan, Huiqi Shao, …

Lighting, ventilation and temperature

Lighting, ventilation and temperature. August 2010. British Poultry Science 51 Suppl 1 (sup1):35-43. DOI: 10.1080/00071668.2010.497298. Source. PubMed. Authors: P.D. Lewis. To read the full-text ...

Investigating the coupling effect of ventilation and GHEs on …

In the non-ventilated condition, at 55 cm from the lining, there is a more obvious difference between the temperature drop and the ventilated condition, and the temperature of the surrounding rock even has a tendency to increase. Download : Download high-res image (892KB) Download : Download full-size image; Fig. 13.

The effect of air change rate and temperature on phthalate

The effect of temperature on SVOC dust-phase concentration is more obvious than ventilation. Acknowledgement This study was supported by the national key project of the Ministry of Science and Technology of the People''s Republic of China on "Green Buildings and Building Industrialization" (Grant No. 2016YFC0700500 ) and the …

The effects of ventilation and temperature on sleep quality and next …

Ten healthy young adults slept one by one in a specially designed and constructed sleep capsule located in a climate chamber at two temperatures (24 °C and 28 °C) and two ventilation rates that ensured that the resulting CO 2 concentrations were 800 and 1700 ppm. Subjectively rated sleep quality was reduced at 28 °C and reduced ventilation, …

Temperature fluctuations and ventilation dynamics induced by …

Cave ventilation and air temperature fluctuations play crucial roles in controlling speleothem growth rate, as well as influencing their morphology and internal fabrics (Spötl et al., Reference Spötl, Fairchild and Tooth 2005; Treble et al., Reference Treble, Fairchild, Griffiths, Baker, Meredith, Wood and McGuire 2015; Mattey et al ...

Experimental study of vertical air temperature distribution and …

Mechanical Ventilation. The temperature effect and aeromotive effect are two ways to produce natural ventilation [1], [2]. Residential and commercial buildings consume the most energy, while heating, ventilation, and air conditioning account for 50–60% of total building energy usage.

Heating, ventilation, and air conditioning

Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, ... Although ground temperatures vary according to latitude, at 1.8 metres (6 ft) underground, temperatures generally only range from 7 to 24 °C (45 to 75 °F).

Impact of ventilation rate and its associated characteristics on …

Ventilation in greenhouses is achieved either naturally (driven by wind or buoyancy or both) or mechanically (using fans). Natural ventilation is the commonly used energy-efficient technique of cooling greenhouses by reducing the inside-outside air temperature difference substantially and regulating humidity (RH) and carbon-dioxide …

Insolation-induced mid-Brunhes transition in Southern Ocean …

These insolation-induced differences in the deep-sea temperature and in the Southern Ocean ventilation between the more recent interglacials and the older ones were not expected, because there is ...

A review of different ventilation modes on thermal comfort, air …

Building and Environment. Volume 212, 15 March 2022, 108831. A review of different ventilation modes on thermal comfort, air quality and virus spread control. …