CN102305456A - Energy-saving constant-temperature and constant-humidity unit with fresh air energy compensation function and method for controlling energy-saving constant-temperature and constant-humidity unit - Google Patents
Energy-saving constant-temperature and constant-humidity unit with fresh air energy compensation function and method for controlling energy-saving constant-temperature and constant-humidity unit Download PDFInfo
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Abstract
The invention discloses an energy-saving constant-temperature and constant-humidity unit with a fresh air energy compensation function and a method for controlling the energy-saving constant-temperature and constant-humidity unit. The unit comprises a return air temperature and humidity transmitter, a return air fan, an exhaust air valve, a mixed air valve, an air pressure difference transmitter, a fresh air valve, a fresh air temperature and humidity transmitter, an air supply fan, an air supply temperature and humidity transmitter and a controller. The method comprises the following steps of: comparing the waste heat and waste humidity of fresh air and return air; dynamically switching control objects, namely temperature or humidity, of the fresh air valve according to the most energy-saving and quickest principle; adding a refrigerating, heating or humidifying function in some adjustment regions; and finally, stabilizing target temperature and target humidity in a required range. The invention has the advantages that: controlling is performed according to an enthalpy value; the temperature and humidity of the return air serve as the control objects; a control process is simple and convenient; requirements of constant temperature and constant humidity are met; and the unit is energy-saving and environment-friendly.
Description
Technical field
What the present invention relates to is a kind of energy-saving air conditioning unit and control method, and in particular a kind of have novel wind energy compensation energy-saving type constant temperature and humidity unit and a control method thereof.
Background technology
At present for air-conditioning unit with new wind; A lot of producers only control according to enthalpy; The size of simple relatively return air enthalpy and new wind enthalpy; With the refrigeration is example, if new wind enthalpy is higher than the return fan enthalpy, new wind air-valve reaches minimum or cuts out; Adopt the minimum fresh air requirmente operation or close new wind air-valve; If new wind enthalpy is lower than the return air enthalpy, new wind air-valve standard-sized sheet adopts brand-new wind mode to move.Some producer not only can be according to new wind enthalpy control at transition season in addition; Can also allow new wind air-valve regulate temperature or humidity; But can only regulate temperature or humidity in the whole adjustment process, can not make the most effectively according to the situation of change of return air humiture, new wind-warm syndrome humidity and selecting.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of have novel wind energy compensation energy-saving type constant temperature and humidity unit and control method thereof are provided; Newer wind and return air waste heat, surplus wet under condition of different are according to control object the most energy-conservation, the new wind air-valve of the dynamic switching of principle the most fast.
Technical scheme: unit of the present invention comprises return air humiture transmitter, return fan, air draft air-valve, mixed wind air-valve, leeway transmitter, new wind air-valve, new wind-warm syndrome humidity transmitter, pressure fan, air-supply humiture transmitter and controller; Wherein: return air humiture transmitter is arranged on the air inlet of return fan; New wind-warm syndrome humidity transmitter is arranged in the import of new wind air-valve; Air-supply humiture transmitter is arranged on the air outlet of pressure fan; The import that mixes the wind air-valve is arranged in the outlet of air outlet and air draft air-valve of return fan; One end of leeway transmitter links to each other with the outlet of mixed wind air-valve; The other end of leeway transmitter links to each other the leeway transmitter with the inlet of new wind air-valve; The air draft air-valve; Mix the wind air-valve; New wind air-valve; Return air humiture transmitter; New wind-warm syndrome humidity transmitter links to each other with controller respectively with air-supply humiture transmitter.
A kind of control method with novel wind energy compensation energy-saving type constant temperature and humidity unit, the control of process of refrigerastion may further comprise the steps,
1) detects new wind-warm syndrome degree t
WWith new rheumatism degree
Return air temperature t
NWith return air humidity
Calculate new wind absolute humidity d respectively
W, new wind enthalpy h
W, return air absolute humidity d
NWith return air enthalpy h
N, according to target temperature t
SAnd target humidity
Calculate target absolute humidity d
SWith target enthalpy h
S
2) judge whether new wind enthalpy h
WMore than or equal to return air enthalpy h
N, in this way, then new wind air-valve reaches minimum aperture with the air draft air-valve, and it is definite value that mixed wind air-valve is regulated with the pressure of keeping the leeway transmitter, as not being then to get into next step;
3) judge whether new wind-warm syndrome degree t
WMore than or equal to target temperature t
S, and new wind absolute humidity d
WMore than or equal to target absolute humidity d
S, in this way, then the air draft air-valve reaches maximum with new wind air-valve, mixes the wind air-valve and closes, as not being then to get into next step;
4) calculate the surplus wet W of return air
N, return air waste heat Q
N, the new surplus wet W of wind
WWith new wind waste heat Q
W,
W
N＝2500×(d
N-d
S)+c
p·q×t
N×(d
N-d
S)，
Q
N＝c
p·g×(t
N-t
S)+c
p·q×d
S×(t
N-t
S)，
W
W＝2500×(d
W-d
S)+c
p·q×t
S×(d
W-d
S)，
Q
W＝c
p·g×(t
W-t
S)+c
p·q×d
W×(t
W-t
S)，
c
PqBe the specific heat at constant pressure of water vapour, c
PgBe the specific heat at constant pressure of dry air,
Work as Q
N>=W
N, then judge whether | Q
W|>=| W
W|, in this way, then the aperture of new wind air-valve is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being to judge whether again | Q
W|>=W
N, in this way, then the aperture of new wind air-valve is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being that the aperture of then new wind air-valve is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable;
5) work as Q
N＜W
N, then judge whether | Q
W|＜| W
W|, in this way, then the aperture of new wind air-valve is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being to judge whether again | W
W|>=Q
N, in this way, then the aperture of new wind air-valve is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being, then the aperture of new wind air-valve is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable.
In said step 4) and the step 5), the air draft air-valve keeps interlock with new wind air-valve, and it is definite value that mixed wind air-valve is regulated with the pressure of keeping the leeway transmitter.
Said step 2) span of definite value is 5～10Pa in.
A kind of control method with novel wind energy compensation energy-saving type constant temperature and humidity unit, the control that heats process may further comprise the steps,
1) detects new wind-warm syndrome degree t
WWith new rheumatism degree
Return air temperature t
NWith return air humidity
Calculate new wind absolute humidity d respectively
W, new wind enthalpy h
W, return air absolute humidity d
NWith return air enthalpy h
N, according to target temperature t
SAnd target humidity
Calculate target absolute humidity d
SWith target enthalpy h
S
2) judge whether new wind enthalpy h
WBe less than or equal to return air enthalpy h
N, in this way, then new wind air-valve reaches minimum aperture with the air draft air-valve, and it is definite value that mixed wind air-valve is regulated with the pressure of keeping the leeway transmitter, as not being then to get into next step;
3) judge whether new wind-warm syndrome degree t
WBe less than or equal to target temperature t
S, and new wind absolute humidity d
WBe less than or equal to target absolute humidity d
S, in this way, then the air draft air-valve reaches maximum with new wind air-valve, mixes the wind air-valve and closes, as not being then to get into next step;
4) calculate the surplus wet W of return air
N, return air waste heat Q
N, the new surplus wet W of wind
WWith new wind waste heat Q
W,
W
N＝2500×(d
N-d
M)+c
p·q×t
N×(d
N-d
M)
Q
N＝c
p·g×(t
N-t
S)+c
p·q×d
S×(t
N-t
S)，
W
W＝2500×(d
W-d
S)+c
p·q×t
S×(d
W-d
S)，
Q
W＝c
p·g×(t
W-t
S)+c
p·q×d
W×(t
W-t
S)，
When | Q
N|>=| W
N|, then judge whether Q
W>=W
W, in this way, then the aperture of new wind air-valve is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being to judge whether Q again
W>=| W
N|, in this way, then the aperture of new wind air-valve is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being, then the aperture of new wind air-valve is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable;
5) as | Q
N|＜| W
N|, then judge whether Q
W＜W
W, in this way, then the aperture of new wind air-valve is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being to judge whether W again
W>=| Q
N|, the aperture of then new wind air-valve is with return air absolute humidity d in this way
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being, then the aperture of new wind air-valve is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable.
Operation principle of the present invention is: the present invention respectively is divided into three zoness of different to new wind and return air enthalpy, target temperature, absolute humidity to psychrometric chart according to unit refrigeration or heating condition; Newer wind and return air waste heat, surplus wet; According to control object the most energy-conservation, the new wind air-valve of the dynamic switching of principle the most fast; Be temperature or humidity; Simultaneously also can increase refrigeration or heating or humidification function, finally the target humiture is stabilized in the scope of requirement at some control band.Whole control process is accomplished by the programmable controller program of finishing writing that prelists automatically, need not manual intervention.
Beneficial effect: the present invention compares prior art and has the following advantages, and the present invention not only controls according to enthalpy, simultaneously with the temperature and humidity of return air as the control object, control procedure is simple and convenient, satisfies the requirement of constant temperature and humidity, energy-conserving and environment-protective simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the block plan of the present invention's psychrometric chart when freezing;
Fig. 3 is the freeze control flow chart of stylish wind air-valve of the present invention;
Fig. 4 is the block plan of the present invention's psychrometric chart when heating;
Fig. 5 is the control flow chart that the present invention heats stylish wind air-valve.
The specific embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
As shown in Figure 1, present embodiment comprises return air humiture transmitter 1, return fan 2, air draft air-valve 3, mixed wind air-valve 4, leeway transmitter 5, new wind air-valve 6, new wind-warm syndrome humidity transmitter 7, pressure fan 8, air-supply humiture transmitter 9, controller, low-temperature receiver 10, thermal source 11 and humidifier 12; Wherein: return air humiture transmitter 1 is arranged on the air inlet of return fan 2; New wind-warm syndrome humidity transmitter 7 is arranged in the import of new wind air-valve 6; Air-supply humiture transmitter 9 is arranged on the air outlet of pressure fan 8; The import that mixes wind air-valve 4 is arranged in the outlet of air outlet and air draft air-valve 3 of return fan 2; One end of leeway transmitter 5 links to each other with the outlet of mixed wind air-valve 4; The other end of leeway transmitter 5 links to each other with the inlet of new wind air-valve 6; The outlet of new wind air-valve 6; Low-temperature receiver 10; Thermal source 11 links to each other with humidifier 12 successively; The outlet of humidifier 12 links to each other with the import of pressure fan 8; Leeway transmitter 5; Air draft air-valve 3; Mix wind air-valve 4; New wind air-valve 6; Return air humiture transmitter 1; New wind-warm syndrome humidity transmitter 7 links to each other with controller respectively with air-supply humiture transmitter 9; Return air humiture transmitter 1; New wind-warm syndrome humidity transmitter 7 and air-supply humiture transmitter 9 with the humiture transfer of data to controller; Leeway transmitter 5 transfers to controller with differential pressure data, calculates back output control command to air draft air-valve 3 by controller; Mix wind air-valve 4 and new wind air-valve 6.Low-temperature receiver 10 is chilled waters; Also can be direct vaporation-type in other embodiments; Thermal source 11 is electrical heating; Can be Steam Heating or other mode of heatings in other embodiments; Humidifier 12 is electrothermals, also can be electric pole type, steam humidification formula or other humidification methods in other embodiments.
Air draft air-valve 3, mixed wind air-valve 4 and new wind air-valve 6 are controlled analog quantity; Each valve area all can be regulated arbitrarily in 0～100% scope; Leeway transmitter 5 is used for measuring and gets into the air that mixes after the wind air-valve 4 and the pressure differential of outside air; Regulate the aperture of mixing wind air-valve 4 through controller; Controlling this pressure differential is a definite value, guarantees that novel wind energy enough gets into unit.
As shown in Figures 2 and 3, under the cooling condition psychrometric chart is divided into A, B, three zones of C, N is the return air point, and W is new wind point, and S is an impact point.New wind air-valve 6 control procedures of process of refrigerastion are following:
(1) at first utilize return air humiture transmitter 1, new wind-warm syndrome humidity transmitter 7 and air-supply humiture transmitter 9 to detect new wind-warm syndrome degree t
WAnd humidity
Return air temperature t
NAnd humidity
Calculate new wind absolute humidity d respectively
W, new wind enthalpy h
W, return air absolute humidity d
NWith return air enthalpy h
N, then according to target temperature t
SAnd humidity
Calculate target absolute humidity d
SWith target enthalpy h
S
Calculate absolute temperature T: T=t+273, t is a Celsius temperature,
Calculate saturated vapor partial pressure p
Q.b:
When-100≤t＜0 ℃
ln(p
q.b)＝c
1/T+c
2+c
3×T+c
4×T
2+c
5×T
3+c
6×T
4+c
7×ln(T)
When 0≤t＜200 ℃
ln(p
q.b)＝c
8/T+c
9+c
10×T+c
11×T
2+c
12×T
3+c
13×ln(T)
C1～c13 is a constant, can obtain concrete data " air conditioning " (China Construction Industry Press, in November, 1994) through consulting.
Calculate partial pressure of water vapor p
q:
Be relative humidity,
Calculate the absolute humidity d:
where B is the atmospheric pressure,
Calculating enthalpy h:h=1.01 * t+0.001 * d * (2501+1.84 * t);
(2) judge whether new wind enthalpy h
WMore than or equal to return air enthalpy h
NIn this way; Be that new wind-warm syndrome humidity drops on the A district; Then new wind air-valve 6 reaches minimum aperture with air draft air-valve 3 and (is preset as 10%; Can adjust); Unit moves with minimum fresh air requirmente, mixes wind air-valve 4 and regulates to keep the pressure differential that gets into the air that mixes behind the wind air-valve 4 and outside air constantly, and the pressure that promptly keeps leeway transmitter 5 is 8Pa; As not being then to get into next step;
(3) judge whether new wind-warm syndrome degree t
WMore than or equal to target temperature t
S, and new wind absolute humidity d
WMore than or equal to target absolute humidity d
S, promptly new wind enthalpy is less than the return air enthalpy, and in this way, promptly new wind-warm syndrome humidity drops on the B district, and then air draft air-valve 3 reaches maximum with new wind air-valve 6, mixes wind air-valve 4 and closes, and adopts brand-new wind mode the most energy-conservation; As not being then to get into next step;
(4) drop on the C district when new wind-warm syndrome humidity; Because new wind-warm syndrome degree, absolute humidity not only are lower than return air temperature, absolute humidity; And be lower than target temperature, absolute humidity; This stylish wind both can reduce the temperature of return air; Also can reduce return air humidity, but the waste heat that new wind has is with surplus wet different, if the waste heat in the return air is a lot of when the diverse location in C district; And surplus wet less, utilize the waste heat in the new wind to remove the waste heat in the return air as far as possible; If surplus wet a lot of in the return air, and waste heat would be less, utilizes surplus wet surplus the wetting that removes in the return air in the new wind as far as possible.
Based on the waste heat in the return air, surplus wet, combine waste heat and surplus wetting in the new wind more below, judge that which is the most energy-conservation, the quickest when satisfying return air temperature or humidity.For the situation that reduces the return air humiture with draft type, the variation that the N point is ordered to S from Fig. 2 can equivalence be that point waits temperature drop wet earlier from N to M, and then waits wet cooling again from the M point to the S point, finally arrives the S point.
For waiting temperature drop wet, reduce the absolute humidity in the return air from the N point to the M point, the N point is ordered the unnecessary wet amount that is had with respect to S and is called the surplus wet W of return air
N(be on the occasion of), because this process temperature is constant, i.e. t
N=t
M, and d
M=d
S,
By formula:
i＝c
p·g×t+(2500+c
p·q×t)×d
Wherein: c
PqBe the specific heat at constant pressure of water vapour, c
PgBe the specific heat at constant pressure of dry air, i is an air enthalpy;
Can develop into following formula:
W
N＝c
p·g×t
N+(2500+c
p·q×t
N)×d
N-c
p·g×t
M-(2500+c
p·q×t
M)×d
M
＝2500×(d
N-d
S)+c
p·q×t
N×(d
N-d
S)
Wet temperature-fall period such as be from the M point to the S point, when reducing in the return air temperature, the N point is ordered the unnecessary heat that is had with respect to S and is called return air waste heat Q
N(be on the occasion of), because this process humidity is constant, i.e. d
M=d
S, and t
M=t
N,
Q
N＝c
p·g×t
M+(2500+c
p·q×t
M)×d
M-c
p·g×t
S-(2500+c
p·q×t
S)×d
S
＝c
p·g×(t
N-t
S)+c
p·q×d
S×(t
N-t
S)
In like manner, the variation of ordering from the W point to S can equivalence for earlier the wet P of being warmed up to point such as ordering from W, and then from P point isothermal humidification to the S point, the W point is ordered the heat that is lacked with respect to S and is called new wind waste heat Q
W(being negative value), W point are ordered the wet amount that is lacked with respect to S and are called the surplus wet W of new wind
W(being negative value), computing formula is distinguished as follows:
Q
W＝c
p·g×(t
W-t
S)+c
p·q×d
W×(t
W-t
S)
W
W＝2500×(d
W-d
S)+c
p·q×t
S×(d
W-d
S)
Work as Q
N>=W
N, illustrate that the waste heat in the return air wets greater than surplus, then judge whether | Q
W|>=| W
W|, in this way, illustrate that the waste heat in the new wind also wets greater than surplus, can utilize the waste heat in the new wind to remove the waste heat in the return air, then the aperture of new wind air-valve 6 is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, satisfy the return air temperature requirement gradually; As not being, illustrate that the waste heat in the new wind wets less than surplus, judge whether again | Q
W|>=W
N, in this way, then the aperture of new wind air-valve 6 is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, satisfy the return air temperature requirement gradually; As not being that the aperture of then new wind air-valve 6 is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, take into account relative humidity simultaneously, satisfy the return air humidity requirement gradually; In above-mentioned adjustment process; Return air temperature that is not conditioned or return air humidity can only slowly reduce or reach temperature or humidity requirement fast through starting refrigeration; Finally satisfy the requirement of constant temperature and humidity; Air draft air-valve 3 keeps interlock with new wind air-valve 6 in this process, and it is definite value 8Pa that mixed wind air-valve 4 is regulated with the pressure of keeping leeway transmitter 5.
5) work as Q
N＜W
N, surplus the wetting greater than waste heat in the return air is described, then judge whether | Q
W|＜| W
W|, in this way, surplus the wetting also greater than waste heat in the new wind is described, can utilize surplus the wetting in the new wind to remove surplus the wetting in the return air, then the aperture of new wind air-valve 6 is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, take into account relative humidity simultaneously, satisfy the return air humidity requirement gradually, return air temperature slowly reduces or reaches temperature requirement through starting refrigeration; As not being, waste heat, judges whether when wet greater than surplus again in the then new wind | W
W|>=Q
N, in this way, then the aperture of new wind air-valve 6 is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, take into account relative humidity simultaneously, satisfy the return air humidity requirement gradually; As not being, then the aperture of new wind air-valve 6 is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, satisfy the return air temperature requirement gradually; In above-mentioned adjustment process, return air temperature that is not conditioned or return air humidity slowly reduce or reach temperature or humidity requirement fast through starting refrigeration, finally satisfy the requirement of constant temperature and humidity.New wind air-valve 6 can constantly be adjusted its aperture according to new wind and return air waste heat, surplus wet result of calculation; Make return air temperature or humidity constantly near desired value; Air draft air-valve 3 keeps interlock with new wind air-valve 6 in this process, and it is definite value 8Pa that mixed wind air-valve 4 is regulated with the pressure of keeping leeway transmitter 5.
Like Fig. 4 and shown in Figure 5, under the heating condition psychrometric chart is divided into A, B, three zones of C, N is the return air point, and W is new wind point, and S is an impact point.New wind air-valve 6 control procedures that heat process are following:
(1) at first utilize return air humiture transmitter 1, new wind-warm syndrome humidity transmitter 7 and air-supply humiture transmitter 9 to detect: new wind-warm syndrome degree t
WAnd humidity
Return air temperature t
NAnd humidity
Target temperature t
SAnd humidity
Calculate new wind absolute humidity d respectively
W, new wind enthalpy h
W, return air absolute humidity d
N, return air enthalpy h
N, target absolute humidity d
SWith target enthalpy h
S
(2) judge whether new wind enthalpy h
WBe less than or equal to return air enthalpy h
N, in this way, new wind-warm syndrome humidity drops on the A district; Then new wind air-valve 6 reaches minimum aperture with air draft air-valve 3; Unit moves with minimum fresh air requirmente, mixes wind air-valve 4 and regulates to keep the pressure differential that gets into the air that mixes behind the wind air-valve 4 and outside air constantly, and promptly the pressure of leeway transmitter 5 is 10Pa; As not being then to get into next step;
(3) judge whether new wind-warm syndrome degree t
WBe less than or equal to target temperature t
S, and new wind absolute humidity d
WBe less than or equal to target absolute humidity d
S, new wind enthalpy is greater than the return air enthalpy, and in this way, new wind-warm syndrome humidity drops on the B district, adopts brand-new wind mode the most energy-conservation, and then air draft air-valve 3 reaches maximum with new wind air-valve 6, mixes wind air-valve 4 and closes; As not being then to get into next step;
(4) drop on the C district when new wind-warm syndrome humidity; Because new wind-warm syndrome degree, absolute humidity not only are higher than return air temperature, absolute humidity; And be higher than target temperature, absolute humidity; This stylish wind both can improve return air temperature; Also can improve return air humidity, but the waste heat that when the diverse location in C zone, is had is with surplus wet different, if the waste heat in the return air seldom; And surplus wet more, utilize the waste heat in the new wind to improve the waste heat in the return air as far as possible; If surplus wet a lot of in the return air, and waste heat would be less, utilizes surplus the wetting in the new wind to improve surplus the wetting in the return air as far as possible.Based on the waste heat in the return air, surplus wet, combine waste heat and surplus wetting in the new wind more below, judge that which is the most energy-conservation, the quickest when satisfying return air temperature or humidity.
For the situation that improves return air temperature or humidity with draft type, the variation that the N point is ordered to S from Fig. 4 can equivalence be point wet intensification such as earlier from N to M, and then from the M point to the S point isothermal humidification again, finally arrive the S point.
To wet intensifications such as the M point are, improve the temperature in the return air from the N point, the N point is ordered the heat that is lacked with respect to S and is called return air waste heat Q
N(being negative value), because this process humidity is constant, i.e. d
M=d
S,
Q
N＝c
p·g×(t
N-t
S)+c
p·q×d
S×(t
N-t
S)
Is the isothermal humidification process from the M point to the S point, improves humidity in the return air, and the N point is called return air waste heat W with respect to the scarce rare wet amount of S point
N(being negative value), because this process temperature is constant, i.e. t
N=t
M,
W
N＝2500×(d
N-d
M)+c
p·q×t
N×(d
N-d
M)
In like manner, the variation of ordering from the W point to S also can equivalence for earlier the wet P of cooling to point such as ordering from W, and then from P point isothermal humidification to the S point, the W point with respect to S order unnecessary heat be called new wind waste heat Q
W(be on the occasion of), the W point with respect to S order unnecessary wet amount be called the surplus wet W of new wind
W(be on the occasion of), computing formula be respectively as follows:
Q
W＝c
p·g×(t
W-t
S)+c
p·q×d
W×(t
W-t
S)
W
W＝2500×(d
W-d
S)+c
p·q×t
S×(d
W-d
S)
When | Q
N|>=| W
N|, illustrate that the waste heat in the return air wets still less than surplus, then judge whether Q
W>=W
W, in this way, illustrate that the waste heat in the new wind when wet, can utilize the waste heat in the new wind to improve the waste heat in the return air greater than surplus, then the aperture of new wind air-valve 6 is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, satisfy the return air temperature requirement gradually; As not being, illustrate surplus wet more in the new wind to judge whether Q again than waste heat
W>=| W
N|, in this way, then the aperture of new wind air-valve 6 is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, satisfy the return air temperature requirement gradually, as not being, then the aperture of new wind air-valve 6 is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, satisfy the return air humidity requirement gradually; In above-mentioned adjustment process; Return air temperature that is not conditioned or return air humidity slowly improve or come to reach fast temperature or humidity requirement through starting heating or humidification; Finally satisfy the requirement of constant temperature and humidity; Air draft air-valve 3 keeps interlock with new wind air-valve 6 in this process, and it is definite value 10Pa that mixed wind air-valve 4 is regulated with the pressure of keeping leeway transmitter 5;
5) as | Q
N|＜| W
N|, surplus wetting than waste heat still less in the return air is described, then judge whether Q
W＜W
W, in this way, surplus the wetting greater than waste heat in the new wind is described, can utilize surplus the wetting in the new wind to improve surplus the wetting in the return air, then the aperture of new wind air-valve 6 is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, satisfy the return air humidity requirement gradually, as not being, illustrate that waste heat judges whether W again greater than surplus wet in the new wind
W>=| Q
N|, the aperture of then new wind air-valve 6 is with return air absolute humidity d in this way
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, satisfy the return air humidity requirement gradually, as not being, then the aperture of new wind air-valve 6 is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, satisfy the return air temperature requirement gradually.In above-mentioned adjustment process; Return air temperature that is not conditioned or return air humidity slowly improve or come to reach fast temperature or humidity requirement through starting heating or humidification; Finally satisfy the requirement of constant temperature and humidity; Air draft air-valve 3 keeps interlock with new wind air-valve 6 in this process, and it is definite value 10Pa that mixed wind air-valve 4 is regulated with the pressure of keeping leeway transmitter 5.
Claims (7)
1. one kind has novel wind energy compensation energy-saving type constant temperature and humidity and has novel wind energy compensation energy-saving type constant temperature and humidity unit; It is characterized in that, comprise return air humiture transmitter (1), return fan (2), air draft air-valve (3), mixed wind air-valve (4), leeway transmitter (5), new wind air-valve (6), new wind-warm syndrome humidity transmitter (7), pressure fan (8), air-supply humiture transmitter (9) and controller; Wherein: return air humiture transmitter (1) is arranged on the air inlet of return fan (2); New wind-warm syndrome humidity transmitter (7) is arranged in the import of new wind air-valve (6); Air-supply humiture transmitter (9) is arranged on the air outlet of pressure fan (8); The import that mixes wind air-valve (4) is arranged in the outlet of air outlet and air draft air-valve (3) of return fan (2); One end of leeway transmitter (5) links to each other with the outlet of mixed wind air-valve (4); The other end of leeway transmitter (5) links to each other leeway transmitter (5) with the inlet of new wind air-valve (6); Air draft air-valve (3); Mix wind air-valve (4); New wind air-valve (6); Return air humiture transmitter (1); New wind-warm syndrome humidity transmitter (7) links to each other with controller respectively with air-supply humiture transmitter (9).
2. a kind of control method that novel wind energy compensation energy-saving type constant temperature and humidity has novel wind energy compensation energy-saving type constant temperature and humidity unit that has according to claim 1, it is characterized in that: the control of process of refrigerastion may further comprise the steps,
1) detects new wind-warm syndrome degree t
WWith new rheumatism degree
Return air temperature t
NWith return air humidity
Calculate new wind absolute humidity d respectively
W, new wind enthalpy h
W, return air absolute humidity d
NWith return air enthalpy h
N, according to target temperature t
SAnd target humidity
Calculate target absolute humidity d
SWith target enthalpy h
S
2) judge whether new wind enthalpy h
WMore than or equal to return air enthalpy h
N, in this way, then new wind air-valve (6) reaches minimum aperture with air draft air-valve (3), and it is definite value that mixed wind air-valve (4) is regulated with the pressure of keeping leeway transmitter (5), as not being then to get into next step;
3) judge whether new wind-warm syndrome degree t
WMore than or equal to target temperature t
S, and new wind absolute humidity d
WMore than or equal to target absolute humidity d
S, in this way, then air draft air-valve (3) and new wind air-valve (6) reach maximum, mix wind air-valve (4) and close, as not being then to get into next step;
4) calculate the surplus wet W of return air
N, return air waste heat Q
N, the new surplus wet W of wind
WWith new wind waste heat Q
W,
W
N＝2500×(d
N-d
S)+c
p·q×t
N×(d
N-d
S)，
Q
N＝c
p·g×(t
N-t
S)+c
p·q×d
S×(t
N-t
S)，
W
W＝2500×(d
W-d
S)+c
p·q×t
S×(d
W-d
S)，
Q
W＝c
p·g×(t
W-t
S)+c
p·q×d
W×(t
W-t
S)，
c
PqBe the specific heat at constant pressure of water vapour, c
PgBe the specific heat at constant pressure of dry air,
Work as Q
N>=W
N, then judge whether | Q
W|>=| W
W|, in this way, then the aperture of new wind air-valve (6) is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being to judge whether again | Q
W|>=W
N, in this way, then the aperture of new wind air-valve (6) is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being that the aperture of then new wind air-valve (6) is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable;
5) work as Q
N＜W
N, then judge whether | Q
W|＜| W
W|, in this way, then the aperture of new wind air-valve (6) is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being to judge whether again | W
W|>=Q
N, in this way, then the aperture of new wind air-valve (6) is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being, then the aperture of new wind air-valve (6) is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable.
3. a kind of control method that novel wind energy compensation energy-saving type constant temperature and humidity has novel wind energy compensation energy-saving type constant temperature and humidity unit that has according to claim 2; It is characterized in that: in said step 4) and the step 5); Air draft air-valve (3) and new wind air-valve (6) keep interlock, and it is definite value that mixed wind air-valve (4) is regulated with the pressure of keeping leeway transmitter (5).
4. according to claim 2 or 3 described a kind of control methods that novel wind energy compensation energy-saving type constant temperature and humidity has novel wind energy compensation energy-saving type constant temperature and humidity unit that have, it is characterized in that: the span of definite value is 5～10Pa said step 2).
5. a kind of control method that novel wind energy compensation energy-saving type constant temperature and humidity has novel wind energy compensation energy-saving type constant temperature and humidity unit that has according to claim 1, it is characterized in that: the control that heats process may further comprise the steps,
1) detects new wind-warm syndrome degree t
WWith new rheumatism degree
Return air temperature t
NWith return air humidity
Calculate new wind absolute humidity d respectively
W, new wind enthalpy h
W, return air absolute humidity d
NWith return air enthalpy h
N, according to target temperature t
SAnd target humidity
Calculate target absolute humidity d
SWith target enthalpy h
S
2) judge whether new wind enthalpy h
WBe less than or equal to return air enthalpy h
N, in this way, then new wind air-valve (6) reaches minimum aperture with air draft air-valve (3), and it is definite value that mixed wind air-valve (4) is regulated with the pressure of keeping leeway transmitter (5), as not being then to get into next step;
3) judge whether new wind-warm syndrome degree t
WBe less than or equal to target temperature t
S, and new wind absolute humidity d
WBe less than or equal to target absolute humidity d
S, in this way, then air draft air-valve (3) and new wind air-valve (6) reach maximum, mix wind air-valve (4) and close, as not being then to get into next step;
4) calculate the surplus wet W of return air
N, return air waste heat Q
N, the new surplus wet W of wind
WWith new wind waste heat Q
W,
W
N＝2500×(d
N-d
M)+c
p·q×t
N×(d
N-d
M)
Q
N＝c
p·g×(t
N-t
S)+c
p·q×d
S×(t
N-t
S)，
W
W＝2500×(d
W-d
S)+c
p·q×t
S×(d
W-d
S)，
Q
W＝c
p·g×(t
W-t
S)+c
p·q×d
W×(t
W-t
S)，
When | Q
N|>=| W
N|, then judge whether Q
W>=W
W, in this way, then the aperture of new wind air-valve (6) is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being to judge whether Q again
W>=| W
N|, in this way, then the aperture of new wind air-valve (6) is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable, as not being, then the aperture of new wind air-valve (6) is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable;
5) as | Q
N|＜| W
N|, then judge whether Q
W＜W
W, in this way, then the aperture of new wind air-valve (6) is with return air absolute humidity d
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being to judge whether W again
W>=| Q
N|, the aperture of then new wind air-valve (6) is with return air absolute humidity d in this way
NWith target absolute humidity d
SDifference as controlled quentity controlled variable, as not being, then the aperture of new wind air-valve (6) is with return air temperature t
NWith target temperature t
SDifference as controlled quentity controlled variable.
6. a kind of control method according to claim 5 with novel wind energy compensation energy-saving type constant temperature and humidity unit; It is characterized in that: in said step 4) and the step 5); Air draft air-valve (3) and new wind air-valve (6) keep interlock, and it is definite value that mixed wind air-valve (4) is regulated with the pressure of keeping leeway transmitter (5).
7. according to claim 5 or 6 described a kind of control methods with novel wind energy compensation energy-saving type constant temperature and humidity unit, it is characterized in that: the span of definite value is 5～10Pa said step 2).
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