Recent content by tj00343

I like it, if I'm getting you right, you're suggesting that the rooms be designed tight and utilizing pressure relief dampers in case of excessive pressure.

Thank you , I've been reading up on isolation rooms and the general consensus is that they must be kept tight for the obvious reason of contamination prevention. Operation rooms and isolation rooms require a specified minimum pressure difference 2.5 Pa. I'm thinking about encouraging the...

I'm wondering about the provision of door grilles in hospitals. I can imagine that they would not be allowed in critical environment rooms such as isolation rooms and operation theaters as it wouldn't be possible to achieve the recommended pressure difference if air is continuously leaking in or...

What I wanted to know was in regards to the actual mechanism of the machine. Can we consider the vacuum outlet as an actual outflow from the space.

Hey, I'm designing an HVAC system for a laundry building. I have vacuum equipment (Vacuum press and Vacuum Ironing boards ) in the space which have a vacuum outlet the is taken outside the building through individual ducts. When all machines are operational, 877 l/s of hot air and moisture would...

Hello, Can someone please tell me what the mean rating temperature in the tables provided in ASHRAE fundamentals, ASHRAE standard 90.1&90.2 for chilled water insulation indicates.

Hello, I was tasked with calculating the cooling and heating load calculations for a hotel which employs passive chilled beam systems using HAP. Can someone please provide me with the highlights of the calculation procedure and things to watch out for, especially things that differ from load...

Hello, I have the following hot water system. I have a water heater with a pressurized cold water inlet. A re circulation line is taken near the farthest fixture passed through a circulating pump and back to the heater inlet. When calculating pump head, do I calculate pressure drop in the entire...

What's the difference between zone sizing data and terminal unit sizing data in HAP and is it possible that the maximum cooling sensible load for the zone be greater than the Sensible coil load of the terminal unit as indicated in the system design report attached .Note that it is a single space...

Hello Everyone, Can someone please explain to me how I would go about verifying the External Static Pressure of a pump that feeds a pressurized fire fighting network with loops in it. An image of the network is attached. I'm not being able to grasp the concept of pressure drop in a pressurized...

Hi guys, I'm a mechanical engineer working in a design firm in the construction industry.We have recently been tasked with the design of the Plumbing Infrastructure(Drainage, Water supply, and Firefighting) for a large district. We haven't undertaken this kind of work before since we usually do...

My specific difficulties have to do with how to numerically model the jet fans and smoke in ansys cfx

Hi , I'm new to CFD. I'm modeling a parking ventilation system in ansys CFX. I'm having some trouble modeling the jet fans . I went as follows. I created a fresh air inlet (Opening BC), an exhuast outlet (outlet BC) and in the middle I distributed jet fans .The jet fans are modeled as sub...

Hey, I'm designing the HVAC system for a bank. What are the special cooling and ventilation requirements that go into the bank(specifically the vault ventilation) and where can i find resources regarding the subject. Thanks in advance.

I'm just wondering if outdoor units can be freely combined.