Our World Issue 21 page 7

Commercial solutions

7

CIBSE CPDA new CPD module, developed by Daikin and CIBSE, will help

speci� ers and installers to understand VRV climate control

solutions and how they can be applied to meet EU legislation.

VRV solutions can now be designed on a greater scale than ever

before - for buildings of up to 15,000 sqm and beyond. However,

legislation is an increasingly important aspect of specifying a

complex VRV system. As a market leader, Daikin is always looking to

anticipate future legislation, so its customers can take advantage of

solutions to meet not only today's but tomorrow's requirements.

Complete the CIBSE CPD

As the technology further matures, variable

refrigerant volume (VRV) or variable

refrigerant flow (VRF) systems are being

applied to a wider range of HVAC services.

Although originally designed to provide

comfort air conditioning through air-to-air

heat pump heating and cooling, they have

evolved to encompass heat recovery systems,

small (or mini) VRV systems, as well as

extensive systems that can function effectively

at more extreme ambient conditions - so that

VRV can be used in countries with cooler and

warmer climates.

This CPD will consider the application

of advanced VRV systems that can provide

energy and cost-effective domestic hot water,

as well as fulfilling their role in comfort

conditioning.

VRV systems can now provide heating and

cooling to other building services, beyond

the demands of direct comfort conditioning

requirements. The heat pump 'split system',

designed for heating water, was originally

developed in the 1980s. By using the hot gas

refrigerant (leaving the compressor), passing

heat through a plate heat exchanger to a cold

water supply, it was possible to heat water

more effectively than using direct electrical

immersion systems. However, due to the low

cost of natural gas and low demand for energyefficient products

during that era, this type

of heat pump hot water production system

was not widely adopted, and manufacturing

development was held back until demand

increased.

As technology evolved and the focus on

energy efficiency grew sharper, it became

appropriate to re-introduce this technology -

but not only as a split system (single indoor

unit to single outdoor unit combination),

but also on distributed VRV systems.

Concurrently, manufacturers were also

introducing direct refrigerant connections

to coils in air handling units, as a means of

heating and cooling ventilation air, using the

refrigerant as the working fluid.

Subsequently, there have been many

projects that utilise VRV systems that can

control the temperature in ventilation air

supplies and hot water systems. However, the

success of such integrated systems requires

an holistic appreciation of the building and its

environment, the system (and its capabilities

and practical limitations) and the operational

realities. Manufacturers have the ability -

and the required components - to meet the

opportunities offered by VRV-linked direct

refrigerant heat transfer within AHUs and

plate heat exchangers, but each application

needs to be carefully considered to ascertain

the best system selection. Some air-handling

applications lend themselves to connection

to heat pump systems that are dedicated

to looking after the fresh air requirements,

Figure 1: Thermal modelling of hotel

March 2014 CIBSE Journal 65

CPD PROGRAMME

Professional

development

www.cibsejournal.com

The CIBSE Journal CPD Programme

Members of the Chartered Institution of Building Services Engineers (CIBSE) and other professional bodies are

required to maintain their professional competence throughout their careers.

Continuing professional development (CPD) means the systematic maintenance, improvement and broadening

of your knowledge and skills, and is therefore a long-term commitment to enhancing your competence. CPD is a

requirement of both CIBSE and the Register of the Engineering Council (UK).

CIBSE Journal is pleased to offer this module in its CPD programme. The programme is free and can be used by any

reader. This module will help you to meet CIBSE's requirement for CPD. It will equally assist members of other institutions,

who should record CPD activities in accordance with their institution's guidance.

Simply study the module and complete the questionnaire on the final page, following the instructions for its submission.

Modules will be available online at www.cibsejournal.com/cpd while the information they contain remains current.

You can also complete the questionnaire online, and receive your results by return email.

This module explores the application of advanced VRV systems

Evolving VRV beyond comfort conditioning

CIBSEMar14 pp65-68 cpd.indd 65 21/02/2014 15:18

CIBSE Journal March 2014 www.cibsejournal.com

64

Complete our CPD module

opposite or online at

www.cibsejournal.com/cpd

Efficiency

redefined

the revolution is here

Discover the capabilities of

the latest VRV systems for

heat recovery and domestic

hot water provision.

your comfort. our world.

p64_cibsemagmar14.indd 64 18/02/2014 09:53

As the technology further matures, variable

refrigerant volume (VRV) or variable

refrigerant flow (VRF) systems are being

applied to a wider range of HVAC services.

Although originally designed to provide

comfort air conditioning through air-to-air

heat pump heating and cooling, they have

evolved to encompass heat recovery systems,

small (or mini) VRV systems, as well as

extensive systems that can function effectively

at more extreme ambient conditions - so that

VRV can be used in countries with cooler and

warmer climates.

This CPD will consider the application

of advanced VRV systems that can provide

energy and cost-effective domestic hot water,

as well as fulfilling their role in comfort

conditioning.

VRV systems can now provide heating and

cooling to other building services, beyond

the demands of direct comfort conditioning

requirements. The heat pump 'split system',

designed for heating water, was originally

developed in the

refrigerant (leaving the compressor), passing

heat through a plate heat exchanger to a cold

water supply, it was possible to heat water

more effectively than using direct electrical

immersion systems. However, due to the low

cost of natural gas and low demand for energyefficient products

during that era, this type

of heat pump hot water production system

Professional

development

www.cibsejournal.com

The CIBSE Journal

Members of the Chartered Institution of Building Services Engineers (CIBSE) and other professional bodies are

required to maintain their professional competence throughout their careers.

Continuing professional development (CPD) means the systematic maintenance, improvement and broadening

of your knowledge and skills, and is therefore a long-term commitment to enhancing your competence. CPD is a

requirement of both CIBSE and the Register of the Engineering Council (UK).

CIBSE Journal

reader. This module will help you to meet CIBSE's requirement for CPD. It will equally assist members of other institutions,

who should record CPD activities in accordance with their institution's guidance.

Simply study the module and complete the questionnaire on the final page, following the instructions for its submission.

Modules will be available online at

You can also complete the questionnaire online, and receive your results by return email.

This module explores the application of advanced VRV systems

Complete our CPD module

www.cibsejournal.com/cpd

our world.

Index

  1. Daikin Our World Issue 21 Cover page
  2. Daikin Our World Issue 21 page 2
  3. Daikin Our World Issue 21 page 3
  4. Daikin Our World Issue 21 page 4
  5. Daikin Our World Issue 21 page 5
  6. Daikin Our World Issue 21 page 6
  7. Our World Issue 21 page 7
  8. Our World Issue 21 page 8
  9. Our World Issue 21 page 9
  10. Our World Issue 21 page 10
  11. Our World Issue 21 page 11
  12. Our World Issue 21 page 12

Related Issues

powered by PageTiger