SPONSOR CPD PROGRAMME | AIR CONDITIONING Module 143 Name (please print).......................................................................................... April 2019 Job title................................................................................................................... 1.Applying the Darcy equation, what would be the Organisation........................................................................................................ approximate pressure drop through 10m of 200mm diameter galvanised steel duct with friction factor 0.023 and with air at 25C flowing with an average velocity of4m.s-1? Address ................................................................................................................. .................................................................................................................................. A 0.11Pa B 0.66Pa C 1.1Pa D 6.6Pa E 11Pa 2.What is the minimum average air velocity certain to be turbulent for the duct in question 1? A 0.13ms- .................................................................................................................................. Postcode ............................................................................................................... Email ...................................................................................................................... Are you a member of CIBSE? If so, please state your membership number: ..................................................................................... B 0.23ms- C 0.33ms- D 0.43ms- E 0.53ms- 3.What was the temperature of the primary supply air that was historically used in multizone VAV systems? A 9C B 11C The CIBSE Journal CPD Programme By entering your details above, you agree that CIBSE may contact you with information about CPD and other training or professional development programmes, and about membership of CIBSE, if you are not a member. Go to www.cibsejournal.com/cpd to complete this questionnaire online. You will receive notification by email of successful completion, which can be used to validate your CPD records. Alternatively, fill in this page and post it to: N Hurley, CIBSE, 222 Balham High Road, London, SW12 9BS C 13C D 15C E 17C 4.What is a purge cycle referred to in this article? A A boosted ventilation rate to remove contaminants when there are more occupants in the room B A purging period of ventilation used after the occupants have left the room to reduce humidity C An extract-led ventilation to reduce room pressure D An increase in demand-controlled ventilation as CO2 levels rise E An increased ventilation rate prior to the Further reading: CIBSE Guide B3, Section 3.2.3.2.2, 2016. CIBSE Guide H, 2009, Section 5.8, 2009. Shepherd, K, VAV Air Conditioning Systems, Blackwell Science, 1999. Hydeman, M et al, Advanced Variable Air Volume System Design Guide, California Energy Commission, 2003. Demand Control Ventilation Application Guide for Consulting Engineers, Siemens 2013. Understanding Single-Zone VAV Systems, Trane Engineers Newsletter, Volume 422,2013. References: 1 Shepherd, K, VAV Air Conditioning Systems, Blackwell 1999. 2 Taylor, S, Making VAV Great Again, ASHRAE Journal, August 2018. 3 Brambley, M et al, Final Project Report: Self-Correcting Controls for VAV System Faults, PNNL 2011. occupation of the room 5.Which of these technologies were not cited in the article in association with compact single-zone VAV systems? A DX cooling with variable speed compressors B Heat pumps C High velocity ductwork D Particulate filtering E Variable speed fans 62 April 2019 www.cibsejournal.com CIBSE Apr19 pp60-62 CPD v2.indd 62 22/03/2019 17:05