Laboratory HVAC Design Inquiries

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SUMMARY

The discussion focuses on HVAC design for agricultural laboratory environments, emphasizing the calculation of cooling and heating loads, exhaust flow requirements, and maintaining appropriate pressure relationships with adjacent spaces. The participant confirms the inclusion of exhaust hoods and biological safety cabinets (BSC) to address contamination concerns. Verification of air changes per hour (ACH) compliance with ASHRAE standards is also highlighted as a critical step in the design process.

PREREQUISITES
  • Understanding of HVAC load calculations
  • Familiarity with ASHRAE standards for air changes per hour (ACH)
  • Knowledge of exhaust flow requirements for laboratory hoods
  • Concept of pressure relationships in laboratory environments
NEXT STEPS
  • Research ASHRAE standards for laboratory HVAC design
  • Learn about different exhaust hood types and their applications
  • Explore methods for calculating cooling and heating loads specific to laboratories
  • Investigate pressure control strategies in laboratory settings
USEFUL FOR

HVAC engineers, laboratory designers, and university students involved in laboratory HVAC projects will benefit from this discussion.

tj00343
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I'm doing a university project on HVAC design of a laboratory(Agricultural Products).I'm having trouble verifying whether I have understood what I have researched correctly This is what I have understood from what I've read.First I would calculate the cooling/heating loads as I would have from any other type of building taking into consideration of course miscellaneous loads that would occur in the lab. Than I would calculate exhaust flow required from hoods that would satisfy contamination concerns.Afterwards, I would adjust the supply flow to satisfy the required pressure relationship of the lab w.r.t adjacent spaces. Than I would verify that the required ACH are met (according to say ASHRAE standards).
 
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tj00343 said:
I'm doing a university project on HVAC design of a laboratory(Agricultural Products).I'm having trouble verifying whether I have understood what I have researched correctly This is what I have understood from what I've read.First I would calculate the cooling/heating loads as I would have from any other type of building taking into consideration of course miscellaneous loads that would occur in the lab. Than I would calculate exhaust flow required from hoods that would satisfy contamination concerns.Afterwards, I would adjust the supply flow to satisfy the required pressure relationship of the lab w.r.t adjacent spaces. Than I would verify that the required ACH are met (according to say ASHRAE standards).

Sounds good so far. Are there different positive pressure requirements for different contamination levels? Are you planning on including an exhaust hood in the system (like for handling chemicals, etc.)?
 
yes exhaust hoods and BSC are definitely included
 

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