Hvac In hospitals

Eng.Nescafee · 2009-04-12T11:55:04+00:00

dear all member : i decided to provide free lessons of HVAC in hospitals With my Best wishes; Eng.Mohamed fawzy

Member • Apr 12, 2009

Lesson#1(Hospitals) - Definitions-1:

In this lesson we will talk about a definitions of the important terms in the HVAC of hospitals

1-Age of air:

It is the time that elapsed after the air enters a space (at any given point).

The freshness of the air and its dilution is determined by its age.

2-Air change rate(ACH ) :

It is the air flow in volume units per hour devided by the building space volume
in identical volume units.

3-Air cleaning system:

It is a device or combination of devices used to reduce the concentration of
airborne contaminants such as microorganisms,dusts,fumes,repairable particles.

An example of air-cleaning devices is filters in air-handling units or ducts.

4-Air-conditioning system:

It is assembly of equipments for air treatment to control simultaneously its
temperature, humidity,cleanliness and distribution to meet the requirements
of a conditioned space.

5-Air volume migration:

It is the volume of air that exchanged during room entry/exit (trough a door way
between a room and the area beyond its door).

6-Exhaust air:

It is the air removed from a space and discharged outside the building by mechanical
or natural ventilation systems.

7-outdoor air:

It is the ambient air enters the system through mechanical ventilation or natural
ventilation or infiltration.

outdoor air is not previously circulated through the system.

8-Recirculated air:

It is the air removed from a space and reused as supply air.

9-Supply air:

It is the air delivered to space that composed of any combination of outdoor air,
recirculated air or transfer air.

11-Transfer air:

It is air removed from one indoor space to another indoor space.

12-Airborne droplet nuclei:

It is small-particle residue (5micro meter or smaller) of evaporated droplets
(up to 150 micrometer) containing microorganisms that remain suspended in
air and can be dispersed widely by air currents within a room or over a long
distance.

13-Air borne infection isolation room:

It is a room designed with negative pressurization to protect patients and
people outside the room from the spread of microorganisms (transmitted
by airborne droplet nuclei) that infect them.

common airborne infectious agent include measles,tuberculosis and
chicken pox.

14-Anteroom:

It is a room separating an isolation room from the corridor.

15-Birthing room:

It is a specialized version of a single patient room,used for normal
,uncomplicated births.

<a href="https://4.bp.blogspot.com/_JsHFF95a2-U/SeJfggNNCBI/AAAAAAAAAEI/6ZC4Y8gEelY/s1600-h/birth1.gif" target="_blank" rel="nofollow noopener noreferrer">birth1.gif (image)</a>
These area called LDR (Labor,Delivery,Recovery),If the patient stays
in the same room until discharge,the space is identified as and LDRP
(Labor,Delivery,Recovery,Postpartum) .

16-Cystoscopy room:

It is an examination of the bladder by an instrument(Cystoscope) inserted
via the urethra.

<a href="https://1.bp.blogspot.com/_JsHFF95a2-U/SeJgFPGEFDI/AAAAAAAAAEQ/gsjpiuTDy_4/s1600-h/Cysto1_sm.gif" target="_blank" rel="nofollow noopener noreferrer">Cysto1_sm.gif (image)</a>
17-Delivery room:

It is operation room that used for complicated births.

<a href="https://3.bp.blogspot.com/_JsHFF95a2-U/SeJhDxg_eHI/AAAAAAAAAEY/v87CdIyMryI/s1600-h/images.jpeg" target="_blank" rel="nofollow noopener noreferrer">images.jpeg (image)</a>
18-Diagnosis:

It is an activities,including history taking,physical examination and laboratory
evaluation that determine the nature of patients ilness and its origin.

19-Dialysis room:

It is an external method of adjusting the levels of ions and chemicals in the blood
by diverted the patient blood to the dialysis equipment osmotically filtered and
then returned to the patient.

<a href="https://1.bp.blogspot.com/_JsHFF95a2-U/SeJh862dn5I/AAAAAAAAAEg/g7LtUZu-3oU/s1600-h/Dialysis-1.JPG" target="_blank" rel="nofollow noopener noreferrer">Dialysis-1.JPG (image)</a>
20-CT scan room(computed tomographic scan):

It is a room which contain tomographic equipment which use X-Ray to focus
of an item in the body and provide a single plane of this item.

<a href="https://4.bp.blogspot.com/_JsHFF95a2-U/SeJixBJHFxI/AAAAAAAAAEo/d-TwlZsoU8k/s1600-h/ct-scan.jpg" target="_blank" rel="nofollow noopener noreferrer">ct-scan.jpg (image)</a>
21-Endoscopy room:

The visualization of body cavities and structures through an inserted optical
instrument.

<a href="https://3.bp.blogspot.com/_JsHFF95a2-U/SeJkIDlewPI/AAAAAAAAAEw/d1Cs7p45piY/s1600-h/file.asp.jpeg" target="_blank" rel="nofollow noopener noreferrer">file.asp.jpeg (image)</a>
[FONT=&quot]** Now this lesson is finished write your questions about this lesson in the comments below in the next lesson we will complete talking about the definitions [/FONT][FONT=&quot]see you soon.[/FONT]

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gohm

Member • Apr 12, 2009

What do you see as the main challenges with adapting new technology to the hospital environment in HVAC? What new technologies do you think are well suited for this environment?

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Eng.Nescafee

Member • Apr 13, 2009

The main challenges with adapting new technology to the hospital environment in HVAC is a long topic to answer it in one reply but i will give you one problem as an example i had met in the hospital design and had solved it such as:

Problem:
High Air change requirements at some areas like (operating rooms) which require control in supply temperature and we don,t want solve this problem with reheat coil because it will consume high rate of electric energy

Solve:
1-using of run around coil as pre cool coil which use the exhausted return as pre cool to the mixed supply air.(for easy reference ashrae equipment and systems handbook 2008-air to air recovery chapter).

2-using plate to plate air recovery which will do the same fuction of run around coil(same refrence and same chapter).

i hope that this answer help u and i promise i will explain it in details in later lessons if you have any questions u can ask me and i will answer you

best regards;
Eng:Mohamed Fawzy

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Eng.Nescafee

Member • Apr 24, 2009

In the previous lesson <a href="https://hvac-world.blogspot.com/2009/04/lesson1hospitals-definitions.html" target="_blank" rel="nofollow noopener noreferrer">hvac-world</a>we had talked about a definitions of the important terms in the H.V.A.C. of hospitals.

In this lesson we continue the definitions of the important terms in the HVAC of hospitals.

22-Epidemiology:

It is the study of the distribution and determination of the disease.

23-Equipment,medical:

it is an equipment specific to medical procedure or activity such as the equipments which used in diagnostic radiology,clinical laboratory,pharmacy...etc.

24-(emergency) Exam room:

It is a space used for emergency treatment of broken bones,lacerations,concussions...etc.

<a href="https://1.bp.blogspot.com/_JsHFF95a2-U/Se-U40RspnI/AAAAAAAAAG4/VF8jkXZnWY8/s1600-h/6.2.jpg" target="_blank" rel="nofollow noopener noreferrer">6.2.jpg (image)</a>
25-Ex-filtration:

It is an air leakage outward through cracks,ceiling,floors and walls of a space in a building.

26-Freestanding emergency clinic:

It is an emergency facility that is separated from a hospital which includes previsions for temporary observation of the patient until release or transfer.

This type of unit requires special transportation planning to accommodate the transfer of the patients.

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28-Hematology:

It is the study of the blood and the blood forming tissues.

29-H.E.P.A. filter:

It is a high efficiency particulate air filter with efficiency of 99.97% or higher
of particulate larger than 0.3 microns.

<a href="https://1.bp.blogspot.com/_JsHFF95a2-U/Se-ce89k7gI/AAAAAAAAAHA/zlWoGtpWLMM/s1600-h/HEPA.jpg" target="_blank" rel="nofollow noopener noreferrer">HEPA.jpg (image)</a>30-Immunocompromised host:

An individual whose immune system has been weakened by diseases such as (AIDS) or medical treatment such as (chemotherapy).

31-Immunocompromised infectious host:

A patient who is both and immunocompromised host and a potential transmitter of infection.

32-Infiltration:

It is an air leakage inward through cracks ,ceiling,floors and walls of a space in the building.

33-Intensive care rooms:

It is a rooms which the level of patient care and electronic monitoring of patients are greatly increased over conventional patient rooms.

<a href="https://3.bp.blogspot.com/_JsHFF95a2-U/Se-iFb4wz6I/AAAAAAAAAHI/_swrbmjbmNs/s1600-h/2782494640050301256rlFCtw_fs.jpg" target="_blank" rel="nofollow noopener noreferrer">2782494640050301256rlFCtw_fs.jpg (image)</a>
34-Invasive procedure:

It is the insertion of an instrument or device into the body trough the skin or skin or body orifice for diagnosis or treatment such as endoscopy,cystoscopy.

35-Local exhaust:

Local exhausts operate on the principle of capturing an air borne contaminant or heat at or near the source.

36-MRI(Magnetic Resonance Imaging) :

it is an body imaging by measuring changes in energy resonance in a large magnetic field.

<a href="https://2.bp.blogspot.com/_JsHFF95a2-U/Se-miARw71I/AAAAAAAAAHQ/luEJd5vlkak/s1600-h/2782494640050301256rlFCtw_fs.jpg" target="_blank" rel="nofollow noopener noreferrer">2782494640050301256rlFCtw_fs.jpg (image)</a>
37-Minor surgery:

It is an operation in which a body cavity is not entered or in which a permanent device is not inserted by incision.

[FONT=&quot]** Now this lesson is finished write your questions about this lesson in the comments below in the next lesson we will complete talking about the definitions [/FONT][FONT=&quot]see you soon.[/FONT]

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