Get the ducts replaced that is the only lasting solution. Moreover it is a healthcare facility and an air quality check may expose you to potential insurance claims. If the duct work is not very old you need to investigate what is causing this for eg saline air in a coastal area. If weather is...
You need to create an annual load profile for the facility with the percentage of operational time at each segment of the load profile. Once you complete the load profile you may see that the the building peak load occurs for less than 10% of total operation time. You need to find out from the...
Please check the design to see if there are any exhaust dampers on the system. I have seen hospitals being designed with a purge system that allows the air handling system to function on a 100% fresh air mode. Usually the purge cycle is done in the morning when the temperature is favourable and...
I would suggest a course in Revit MEP and look for opportunities to work as a Revit MEP designer with either consulting or contacting industries. As you gain more experience as a designer you can move up to an engineer role. You can utilise your operational and maintenance experience to create...
A buffer tank or a balancing tank with hot/cold well is very common in all production facilities requiring process cooling. The chiller capacity and production demand is never going to match so you need a buffer to stop the chiller from cycling on/off.If the production load is of short duration...
VRV system will be obviously cheaper. You can save more by using ductless systems. There is also cost saving as the VRV system comes with its own control system so you may not require a full on building automation system required for chilled water systems
There is a limitation on the number of times the heat pump compressor can start in an hour usually not more than 6-7 times in an hour. Therefore you need a buffer storage tank that will smoothen the fluctuating field flow requirement. This buffer tank sizing will also take into account seasonal...
You can solve the problem by supplying ventilation air at a neutral temperature say 21C.The ventilation AHU needs to cool down to at least 13C( or lower as allowed by the chilled water flow temp) to wring out all moisture from the air and then reheat it to 21C.This is how it is done in hotels...
VPF is not a panacea for all new buildings. Its use is limited to simple designs. A more complex campus like building layout still requires the conventional primary-secondary system. Functionality is more important than minor improvement in energy efficiency.
Thanks for asking a good question Smali1!
This is how you do it:
Before you start the balancing process you isolate a certain number of AHUs/FCUs equivalent to 250 tons in your case. You start the pump and balance the operational units at their maximum design flows. Once you accomplish the...
If I understood you correctly some of the VAV boxes have air flowing in reverse direction when the AHU is shut off. This means the space is at a higher pressure/temperature than the duct and air is flowing out of the space through a path of least resistance. The exfiltration could be due to...
It was not very wise to use a metal duct for burying underground. FRP or HDPE would have been better choices.
Aluminium is not well known for strength so typically I have always used a gauge higher than recommended when I needed to use Aluminium in places like MRI rooms etc. So it is worth...
As trashcanman said these coolers will not work in SEA.I have worked and travelled throughout SEA and I have never seen them in use anywhere. Do not fool yourself and the poor workers who need to live in this horrible environment!
You need to challenge your consultant for specifying something that is not available in Egypt. They should have researched it before specifying it. It is not going to be economical for your client to fly out duct cleaners from the US. These certifications are a ticket clipping business in the US...
