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Heat pumps guide from BSRIA

25 November 2009

BSRIA's new guide explains the design of heat-pump based heating and cooling systems to maximise the benefits of reduced operating costs and carbon emissions while avoiding excessive capital costs for plant and infrastructure.

Heat pumps are increasingly being considered as an alternative to combustion-based heating plant as a means to reduce operating costs and carbon emissions. In some countries heat pumps have already taken a significant proportion of the market for heating appliances and this is likely to be a long-term trend throughout Europe. However, while it is true that space heating and hot water needs in housing and most other buildings can be fulfilled by heat pumps, it would be wrong to treat heat pumps simply as a drop-in replacement for conventional boilers. Heat pumps can replace boiler plant in existing houses, but this should not be done without a thorough review of the associated heat distribution system and rarely without system changes. Conversely, a hydronic heat distribution system, optimised for a heat pump should also work well with a condensing boiler.
This guide explains the design of heat-pump based heating and cooling systems to maximise the benefits of reduced operating costs and carbon emissions while avoiding excessive capital costs for plant and infrastructure. The guide’s emphasis is on the application of packaged heat pump plant for residential and small commercial buildings. Some guidance is provided for component-based plant that may be used for larger scale applications.

The contents of the BSRIA Guide is as follows:
HEAT PUMP FUNDAMENTALS :Heat pump technology and the economic carbon case, Refrigeration cycles and efficiency,Heat sources and sinks ,Combined cycles, Integration of renewable energy
LEGISLATION:F-Gas Regulations, Handling of refrigerants, Pressure Systems Safety Regulations, Waste Electrical and Electronic Equipment Regulations ,Building Regulations,  Construction Design and Management Regulations
OUTLINE DESIGN:Sizing heat pump systems, Selection of heat source and sinks,  Estimation of performance
DETAILED DESIGN OF HEATING AND COOLING SOURCE: Packaged units,  Air source, Exhaust air source, Ground source, Ground water,  Surface water
DETAILED DESIGN OF HEATING AND COOLING DISTRIBUTION: Principle, Air-to-air systems, Water (or brine) to air systems, Hydronic systems, Domestic hot water, Integration with conventional heat sources, Integration with renewable energy
SYSTEM CONTROLS  INSTALLATION:  Delivery and positioning , Electrical installation, Internal pipework installation, Ground loops and boreholes
COMMISSIONING AND TESTING:Electrical aspects,  Refrigeration circuit, Heat source, Heating and cooling distribution, Handover.


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