ISO 13256-2:2021 水源ヒートポンプ—性能のテストと評価—パート2：水から水およびブラインから水へのヒートポンプ | ページ 6

3.1

water-to-water heat pump

brine-to-water heat pump

heat pump which consists of one or more factory-made assemblies which normally include an indoor side refrigerant to water heat exchanger (load side), compressor(s), and outdoor-side refrigerant-to-water or refrigerant-to-brine heat exchanger(s) (source side), including means to provide both cooling and heating, cooling-only, or heating-only functions

Note 1 to entry: When such equipment is provided in more than one assembly, the separated assemblies should be designed to be used together.

Note 2 to entry: Such equipment may also provide functions of sanitary water heating.

3.2

water-loop heat pump

water-to-water heat pump using, on the source side, a liquid circulating in a common piping loop

Note 1 to entry: The temperature of the liquid loop is usually within a range of 10 °C to 30 °C.

3.3

ground-water heat pump

water-to-water heat pump using, on source side, water pumped from a well, lake, or stream

Note 1 to entry: The temperature of the water is related to the climatic conditions and is generally constant within the range from 5 °C to 25 °C for deep wells.

3.4

ground-loop heat pump

brine-to-water heat pump using, on the source side, a brine solution circulating through a subsurface piping loop

Note 1 to entry: The heat exchange loop may be placed in horizontal trenches or vertical bores, or be submerged in a body of surface water.

Note 2 to entry: The temperature of the brine is related to the heat exchange load and climatic conditions and is generally within a range from –5 °C to 40 °C.

3.5

cooling capacity

amount of heat that the equipment can remove from the water used to condition the indoor space in a defined interval of time

Note 1 to entry: Expressed in units of watts.

3.6

net cooling capacity

cooling capacity with load side liquid pump power adjustment

Note 1 to entry: Expressed in units of watts.

3.7

heating capacity

amount of heat that the equipment can add to the water used to condition the indoor space in a defined interval of time

Note 1 to entry: Expressed in units of watts.

3.8

net heating capacity

heating capacity with load side liquid pump power adjustment

Note 1 to entry: Expressed in units of watts.

3.9

rated voltage

voltage shown on the nameplate of the equipment

Note 1 to entry: Expressed in units of volts.

3.10

rated frequency

frequency shown on the nameplate of the equipment

Note 1 to entry: Expressed in units of Hz.

3.11

energy efficiency ratio

EER

ratio of the net cooling capacity to the effective power input at any given set of rating conditions

Note 1 to entry: Expressed in units of watt per watt.

3.12

coefficient of performance

COP

ratio of the net heating capacity to the effective power input of the equipment at any given set of rating conditions

Note 1 to entry: Expressed in units of watt per watt.

3.13

effective power input

Note 1 to entry: Expressed in units of watts.

3.14

brine

heat transfer liquid that has a freezing point lower than the freezing point of water

3.15

external static pressure difference

∆pe

pressure difference measured between the water (or brine) outlet section and the water (or brine) inlet section of the unit, which is available for overcoming the pressure drop of any additional water (or brine) circuit

Note 1 to entry: Expressed in units of pascals.

3.16

internal static pressure difference

∆pi

pressure difference measured between the water (or brine) outlet section and the water(or brine) inlet section of the unit, which corresponds to the total pressure drop of all components on the water (or brine) side of the unit

Note 1 to entry: Expressed in units of pascals.

3.17

fixed capacity heat pump

equipment which does not have possibility to change its capacity

Note 1 to entry: This definition applies to each cooling and heating operation individually.

3.18

two-stage capacity heat pump

equipment where the capacity is varied by two steps

Note 1 to entry: This definition applies to each cooling and heating operation individually.

3.19

multi-stage capacity heat pump

equipment where the capacity is varied by three or four steps

Note 1 to entry: This definition applies to each cooling and heating operation individually.

3.20

variable capacity heat pump

equipment where the capacity is varied by five or more steps to represent continuously variable capacity

Note 1 to entry: This definition applies to each cooling and heating operation individually.

3.21

source side

source side is referring to outdoor side heat exchanger and the liquid, water or brine, circulating in it

3.22

load side

load side is referring to indoor side heat exchanger and the liquid, water, circulating in it

3.23

standard rating conditions

operating conditions while establishing the standard rating net cooling and/or heating capacities

Note 1 to entry: These conditions correspond to an operation of the heat pump at full capacity, in relation to the source side.

3.24

application rating conditions

operating conditions while establishing additional cooling and/or heating capacities

Note 1 to entry: These conditions correspond to an operation of the heat pump at reduced capacity, in relation to the source side.

3.25

standard rating capacity

net cooling and/or heating capacity measured at standard rating conditions