Exam (elaborations)
Tamu Cosc 325 exam 2 Houston/92 Questions and Solutions
- Course
- Institution
Tamu Cosc 325 exam 2 Houston/92 Questions and Solutions
[Show more]
Content preview
Tamu Cosc 325 exam 2Houston/92 Questions and
Solutions
BTU - - British Thermal Unit is the amount of heat required to raise 1 lb of
water 1 degrees F.
- Ton - - amount of heat required to melt a ton of ice (2000 lb) over a 24-
hour period.
· 1 ton = 12,000 Btu/hr or 288,000 Btu per 24-hour period
- Humidity - - amount of moisture (water vapor) in the air
· Comfortable relative humidity is about 50%
- Air Velocity - - speed at which air moves from one point to another
· Measured in feet per minute (fpm)
· 40 fpm is ideal
- Registers - -
- Filtration - - process of removing particles and contaminants from air that
circulated through an air distribution system
· Located in air ductwork where air enters the heating and cooling equipment
- Ventilation - - process that occurs when outdoor air is brought into a
building
- Exhaust & make up air - - Building with exhaust has no recirculation
· Make up air: is air that is used to replace air that is lost to exhaust
- IAQ (Indoor air quality) - - is the quality of the air in the building space
· CO2 levels: well ventilated - 600 to 1000 AVG. 800
- ASHRAE (American Society of Heating, Refrigerating, and Air-conditioning
Engineers, Inc.) - - · Recommends that ventilation be increased in all
residential, commercial, and industrial buildings
- Dry bulb temperature - - measurement of a sensible heat
- Latent heat - - heat required to change liquid into a gas
- Relative Humidity - - is the amount of moisture in the air compared to the
amount it would hold if the air were saturated
, - Dew point - - The temperature below which moisture in the air begins to
condense.
- Enthalpy: - - the total heat contained in a substance measure from a
baseline of 32 degrees F and is the sum of sensible heat(dry bulb
temperature) and latent heat
- Psychrometric Chart - - chart that defines the condition of the air for any
given property
- Forced Air System - - forced air heating system is a heating system that
uses air to carry heat. The air is heated and distributed through a building to
control the temperature in the building space
- Furnace - - self-contained heating unit that includes a blower, burners, and
heat exchanger or electric heating elements, and controls.
- Types of Blowers - - Blower fan, centrifugal blower, axial flow blower
- Propeller Fan - - mechanical device that consists of blades mounted on a
central hub
- Centrifugal blower - - · consists of a scroll, blower wheel, shaft, and inlet
vanes
o Scroll is a sheet metal enclosure that surrounds the blower wheel
o Blower wheel is a sheet metal cylinder with curved vanes along its
perimeter
- Axial flow blower - - a blower that contains a blower wheel, which works
like a turbine wheel
- Venturi: - - restriction that causes increased pressure as air moves
through it
- Static Pressure - - pressure that acts through weight only with no motion
· Expressed in inches of water column
- Heat exchanger - - any device that transfers heat form one substance to
another without allowing the substances to mix
- Low-efficiency filters - - filters that contain filter media made of fiberglass.
Remove 40%
- Medium-Efficiency Filters - - · filters that contain filter media made of
dense fibrous mats or filter paper. Remove 40%-80%
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Nursephil2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
85169 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now