WATER-TO-WATER HEAT PUMPS 30XWHV 580-1710
Carrier products and green
building certification
■■ Introduction
Energy usage and costs combined with increasing
concerns to reduce CO2 emissions are among the most
important environmental challenges in today’s world.
New and existing buildings are one area where energy
efficiency and the conservation of natural resources is a
high priority.
■■ Green building design
Design teams increasingly focus on designing “green
buildings” to address today’s energy efficiency and
environ-mental sustainability needs. A green building is a
building that is environmentally sustainable and has been
designed, constructed and is operated to minimise the
total impact of the environment.
Remote management
(EMM option)
The Energy Management Module offers extended remote
control possibilities:
-- Room temperature: permits set-point reset based
on the building indoor air temperature (with Carrier
thermostat)
-- Set point reset: ensures reset of the cooling set-point
based on a 4-20 mA or 0-10 V signal
-- Demand limit: permits limitation of the maximum
chiller power or current based on a 0-10 V signal
-- Demand limit 1 and 2: closing of these contacts limits
the maximum chiller power or current to two predefined
values
-- User safety: this contact can be used for any
customer safety loop; opening the contact generates a
specific alarm
-- Ice storage end: when ice storage has finished, this
input permits return to the second set-point (unoccupied
mode)
-- Time schedule override: closing of this contact
cancels the time schedule effects
-- Out of service: this signal indicates that the chiller is
completely out of service
-- Chiller capacity: this analogue output (0-10 V) gives an
immediate indication of the chiller capacity
-- Alert indication: this volt-free contact indicates the
necessity to carry out a maintenance operation or the
presence of a minor fault.
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7
The main strategies* adopted to achieve a green building
design include:
-- Sustainable Sites (SS)
-- Water Efficiency (WE)
-- Energy & Atmosphere (EA)
-- Materials & Resources (MR)
-- Indoor Environmental Quality (IEQ)
-- Innovation in Design (ID)
■■ Green building certification
A number of green building certification programs exist
in the market and offer third-party assessment of green
building measures for a wide variety of building types. Some
examples of existing programs include:
-- LEED (Leadership in Energy & Environmental Design)
-- BREEAM
-- ESTIDAMA PEARL
-- NABERS (National Australian Built Environment Rating
System)
■■ HVAC products and systems
Carrier HVAC products are built to high energy efficiency
and indoor air quality standards. They assist building
designers and owners by offering high-performance heating,
ventilation, and air conditioning (HVAC) systems and
products with reduced energy consumption and enhanced
indoor air quality for the occupants, contributing to
optimised green building performance.
Each certification program may address and prioritise
different green building design strategies according to
local and regional needs and legislation. The following
example looks at how Carrier’s new 30XWHV range helps
customers involved in LEED building certification.
*
AIR TREATMENT
■■ R-134a refrigerant
-- HFC-refrigerant with zero ozone depletion potential
■■ Leak-tight refrigerant circuit
-- Reduction of leaks as no capillary tubes and flare
connections are used
-- Verification of pressure transducers and temperature
sensors without transferring refrigerant charge
-- Discharge line shut-off valve and liquid line service
valve for simplified maintenance.
HEATING
The underlying principles of this approach: the resulting
building will be economical to operate, offer increased
comfort and create a healthier environment for the people
who live and work there, increasing productivity.
Environmentally balanced
Source USGBC: LEED
Example: 30XWHV and LEED® certification
The LEED® (Leadership in Energy and Environmental Design)
green building certification programme is a pre-eminent
programme to rate the design, construction and operation
of green buildings with points assigned in seven credit
categories:
563
CONTROLS
■■ Advanced control algorithms combine inverter frequency
output with motor input logic to minimise mechanical
part stress, resulting in best compression performance
and high chiller reliability. The compressor is equipped with
bearings with oversized rollers, oil pressure lubricated for
reliable and durable operation, even at maximum load.
■■ Other advantages:
-- If a fault occurs e.g. if the condenser is fouled or at
very high water temperature, the compressor does not
switch off, but continues operation at reduced capacity
(unloaded mode).
-- The silencer in the discharge line considerably
reduces discharge gas pulsations for much quieter
operation.
-- The condenser includes an oil separator that
minimises the amount of oil in circulation in the
refrigerant circuit and re-directs it to the compressor
function.