The above quoted reply is a great example of the type of question or in this case statement that could take pages upon pages to respond to.Originally posted by matt8085
An oversized evap w/txv will certainly run at a high superheat, providing alot less cooling for compressor. Resulting in eventual compressor/system component failure.
I am not necessarily indicating the statement is inaccurate, but it does encompass several different laws of physics that to discuss each in detail would take an enormous amount of time.
Just a few short examples:
1. Proper sizing of equipment
2. Type and size of the TXV
3. Latent & Sensible Heat
4. Refrigerant saturation point and change of state
5. The amount of heat loss/gain required in the Change of State
6. The amount of heat required to change the sensible heat of a Superheated vapor
7. The amount of CFM across the evaporator (As to how it effects the Sensible and Latent heat absorption of the refrigerant
8. General maintenance habits of consumers (here are just two of the items that would relate here as examples: 1. Air Filter type and replacement
2. Condenser coil maintenance
9. Compressor design and construction
10. Minimum and maximum operating conditions of a particular design of compressor
I am going to stop at ten; to the relief of anyone reading this I am sure.
A couple of other discussions could be had:
1. On what is meant by “oversized” and the amount of over sizing?
2. What is exactly meant by “a lot of Superheat”?
Again I am not taking issue with the statement, just saying it is a very good example of how what could seem to be a simple question or statement, could in fact be very complex and take time to properly discuss.
What I really like about the question is how well it points out the need for highly trained and experienced professionals.
I have always felt that the vast amount of knowledge, training and experience we must acquire to be skilled at our profession is lost on the general public.
Who would ever think it would be good ideas for NASA go down to the local fast food restaurant to hire mechanical or electrical engineers? How about a neighbor, friend, relative?
Answer: No reasonable thinking person that I know of
Who would ever think it would be a good idea for the homeowner to go down to the local fast food restaurant to hire HVAC-R engineers? How about a neighbor, friend, relative?
Answer: A large percentage of the general public