PDF Publication Title:
Text from PDF Page: 017
A correctly-sized heat pump system, when compared to a poorly-sized system, will have: • shorter total compression run times • lower frequency operation speeds • reduced defrost mode running. Installing an undersized heat pump unit will significantly increase running costs, to the extent that the extra annual running cost will be more than the cost of installing a unit that is the next size up. Where a large-capacity heat pump is required or the space being heated is large, installing two smaller units or a multi-split system may give better heat distribution within the space and better control than the large single unit. Heating loads tend to be larger than cooling loads where both are required (particularly in colder winter climates). Systems designed for heating are likely to be oversized for cooling, in which case, the system will run only intermittently in cooling, lowering cooling performance. 4.3 Step 1: Determine requirements The first step in designing a system is gathering the information that you will use to determine what the most appropriate heart pump option is for a particular home. Use the checklists below to determine requirements for the system. 4.3.1 Checklist of heating/cooling requirements ❏❏ What is required? For example, is it mainly heating or cooling? ❏❏ What is the region and location of the building? ❏❏ Are there specific local conditions, such as microclimates within the climatic zones, which may influence selection? ❏❏ What are the seasonal high and low ambient temperatures? ❏❏ What type of home is the system for? For example, old, new, insulated. ❏❏ Is it for a typical single room or a large room (where more than one unit may be required)? ❏❏ What is the number of occupants? ❏❏ What is the owner preference for the type of indoor unit? For example, a floor-mounted unit may be better for an older user to give more direct heat flow and allow access for maintenance. ❏❏ What are the hours of occupation? For example, out at work all day, home all day, work from home, retired/elderly and so on. 4.3.2 Checklist of building conditions ❏❏ Building orientation. ❏❏ Window orientation. ❏❏ Solar gain. ❏❏ Areas of walls, ceilings, windows and floors. ❏❏ Building envelope; for example, air infiltration/heat loss around doors/windows. ❏❏ Insulation levels of walls, ceilings and floors. ❏❏ Single/double glazing. 4.3.3 Environmental requirements Check that the unit selected is suitable for the environment it is being installed in. For example, geothermal regions require the outdoor unit coil to be protected against atmospheric sulphides that will cause corrosion of the coil, and coastal regions also require protection against corrosion for both the outdoor cabinet and the coils. 17PDF Image | Heat pump installation Good Practice Guide
PDF Search Title:
Heat pump installation Good Practice GuideOriginal File Name Searched:
Good_practice_heat_pump_installation.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)