SPONSOR CPD PROGRAMME | AIR SOURCE HEAT PUMPS Module 219 August 2023 1.What is the flow water temperature typically in an historic low temperature hot water (LTHW) system? A 50C or below B Between 51C and 60C Name (please print) Job title Organisation Address C Between 61C and 70C D Between 71C and 80C E Over 80C 2.What maximum water output temperature would be typical from an R32 ASHP when outside air is -5C? Postcode Email A 50C or below Are you a member of CIBSE? If so, please state your B Between 51C and 60C membership number: C Between 61C and 70C D Between 71C and 80C E Over 80C 3.For the illustrated 50kW monobloc ASHP, what is the approximate COP when operating at -4C outdoor temperature and delivering water at 55C? A 1.5 B 1.75 C 2 D 2.25 E 2.5 The CIBSE Journal CPD Programme By participating in this CPD module, you consent to sharing your details with Hamworthy. Hamworthy may contact you via email and/or telephone with further information and technical insight on its services. You have the right to opt out from such communications at any time. I understand that I will receive marketing communications from Hamworthy after completing this module (please tick here) 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 4.Which of these is least likely to be true? A A 1K reduction in flow temperature can increase heat pump efficiency by 1.5% to 3% B As outdoor air temperature rises, so does the capacity of ASHPs C In hybrid systems, the priority is to activate the highest efficiency and lowest operating cost heating device D The refrigerant condensing temperature is likely to be 2K to 4K cooler than the flow water temperature E Thermal stores can be employed to spread the load across the day 5.What is employed in the illustrated hybrid system to create hydraulic separation of the heat pump? A Air and dirt separator B Buffer tank C Cavitation detector D Thermal store E Weather compensation 50 August 2023 www.cibsejournal.com Further reading: Further reading: CIBSE AM17 and CIBSE AM16 Heat pump installations for multi-unit residential buildings provide excellent references and provide extensive links to other guidelines and standards. The CIBSE Journal CPD Module 166 (May 2022) complements this article. References: 1 Heat pump retrofit in London, Carbon Trust, August 2020. 2 BS EN 14825:2022 Air conditioners, liquid chilling packages and heat pumps, Testing and rating at part-load conditions and calculation of seasonal performance, BSI 2022. 3 CIBSE AM15 Biomass heating, CIBSE 2015.