Burrah Boy
11-12-2008, 08:27 PM
Hi, I have to do an assignment for a cold room inside a conditioned supermarket with an ambient of 20degC.
I have set my hottest ambient outdoor temp as 32degC for SE England, where the condensing unit will be mounted. I will be chilling 2000kg of beef to 0degC, arriving at 10 degC. I have calculated the heat load for the plant to chill using the 20degC store ambient, for conducton through the insulation, and not the 32degC. However I am now being thrown a curve ball by some people who say I should use the 32degC for my heat load calcs. I have used this 32degC in my condensing calculations allowing for 45degC condensing temp using 134a. I feel that I have calculated correctly, but I may be wrong! I am not using software, but doing it the old skool way.
Please advise.
Thanks!
Marc :rolleyes:
I have set my hottest ambient outdoor temp as 32degC for SE England, where the condensing unit will be mounted. I will be chilling 2000kg of beef to 0degC, arriving at 10 degC. I have calculated the heat load for the plant to chill using the 20degC store ambient, for conducton through the insulation, and not the 32degC. However I am now being thrown a curve ball by some people who say I should use the 32degC for my heat load calcs. I have used this 32degC in my condensing calculations allowing for 45degC condensing temp using 134a. I feel that I have calculated correctly, but I may be wrong! I am not using software, but doing it the old skool way.
Please advise.
Thanks!
Marc :rolleyes: